Difference between revisions of "Part:BBa E0040"

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GFP (mut3b) [note that this part does not have a barcode]
 
GFP (mut3b) [note that this part does not have a barcode]
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<h2> <b> Contribution of OUC-China 2022 </b> </h2>
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===Usage: Characterization of SSRE promoter in Aureobasidium  melanogenum===
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We got GFP gene synthetized by a company after optimizing the codon of the part BBa_E0040.Then we cloned GFP gene into our electrocompetent plasmid. We co-transfected this plasmid with AtCRE1-electrocompetent plasmid. We selected 583bp specific fragment of AtCRE1 gene (Lane 1 ) and the whole length of PTP2+GFP (Lane 4) to test transformation. Then we amplifying the targeted gene of genome extracted respectively.
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Shown in figure1, we successfully introduced all our target sequence into Aureobasidium  melanogenum.
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<img src="https://static.igem.wiki/teams/4193/wiki/model/qs-result.jpg" style="width: 80%;">
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Figure 1. Gel electrophoresis results of P16 genome amplifying AtCRE1 gene(Lane 1), transformed strain genome amplifying AtCRE1(Lane 2), P16 genome amplifying PTP2+GFP(Lane 3) and transformed strain genome amplifying PTP2+GFP(Lane 4)
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In order to better characterize the SSRE promoter, we optimized the codon of the part BBa_E0040 and expressed it in Aureobasidium  melanogenum, expanding the application chassis range of this part. The sequence optimized of the codon also can be a suitable part for the team committed to developing the potential of Aureobasidium  melanogenum.
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<img src="https://static.igem.wiki/teams/4193/wiki/other/part/ssre-expression.jpg" style="width: 80%;">
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Figure2. Effect of different concentrations of IP on SSRE promoter induction(measured by the flourescence intensity of GFP)
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<h2> <b> Contribution of LZU-CHINA 2021 </b> </h2>
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===Usage: Construction of SARS-CoV-2 pseudovirus===
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We cloned GFP gene into a third generation lentiviral plasmid.We co-transfected this lentiviral plasmid, PAX2 and a plasmid carried SARS-CoV-2 spike protein gene into 293T cells. The spike protein of SARS-CoV-2 in cell and medium was detected by Western-blot. HEK293T cells were transfected for 40 h. RIPA lysis buffer was used to lyse cells. pMD2.G plasmid is used as control.<br>
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The samples were separated by SDS-PAGE and transferred to PVDF membrane for Western Blot detection. The membrane was incubated with primary antibody and secondary antibody. We observed the result after using ECL chemiluminescence reagent.
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[[Image:T--LZU-CHINA--WB.png | thumb | center | 400px |Figure 1 SARS-CoV-2 spike protein expression in cell and medium.
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]]
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Then We added the medium containing pseudovirus to ACE2-293T stable cell line. After 48h, fluorescence microscope was used to observe the infection effect. As the result shows, pseudovirus is prepared successfully.
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[[Image:T--LZU-CHINA--GFP.png | thumb | center | 400px |Figure 2  Infection effect of SARS-CoV-2 pseudovirus.
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]]
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<h2> <b> Jiangnan_China 2020 - Contribution </b> </h2>
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The green fluorescent protein (GFP) gene can be used as reporter gene and express in <i>Starmerella bombocola</i>. We want to use it to test the strength of promoters.
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<br>
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We built a device([https://parts.igem.org/Part:BBa_K3402050# BBa_K3402050]) and transfer the expression cassette into <i>Starmerella bombocola</i> to observe the fluorescence intensity. This device consists of the promoter, the <i>GFP</i> gene([https://parts.igem.org/Part:BBa_K3402000# BBa_K3402000]) and a terminator with the constructed vector. Besides, the hygromycin resistance gene was also constructed into the plasmid as the marker gene to determine if the transformation is successful.
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<br>
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The transformed yeast was coated on a plate containing hygromycin. After 48 hours of incubation, the existed transformants were performed fluorescence observation and transcriptome analysis. As a result, the expression of the GFP gene in <i>Starmerella bombocola</i> is completed. Finally, we can link different promoters to yeGFP to know the strength of promoters by testing different fluorescence intensity of different promoters.
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[[Image:Expression of yeGFP abc.png|700px|thumb|center|a) Fluorescence intensity of different promoters.  b) Transcription levels of different promoters.  c) GFP was successfully expressed in cells]]
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===Usage and Biology: Characterization===
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Group: Valencia_UPV iGEM 2018
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<br>
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Author: Adrián Requena Gutiérrez, Carolina Ropero
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<br>
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Summary: We have adapted the part to be able to assemble transcriptional units with the Golden Gate method and we have done the characterization of this protein.
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<br>
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Documentation:
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<br>
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The characterization of this protein (and by extension of all the other part that codify for the GFP) was performed with our transcriptional unit [https://parts.igem.org/Part:BBa_K2656105 BBa_K2656105].
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This transcriptional unit was assembled in a Golden Braid alpha1 plasmid including the following parts:
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<html>
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<ul>
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<li></html>[https://parts.igem.org/Part:BBa_K2656004 BBa_K2656004]: the [https://parts.igem.org/Part:BBa_J23106 J23106] promoter in its Golden Braid compatible version from our [http://2018.igem.org/Team:Valencia_UPV/Part_Collection Part Collection]<html></li>
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<li></html>[https://parts.igem.org/Part:BBa_K2656009 BBa_K2656009]: the [https://parts.igem.org/Part:BBa_B0030 B0030] ribosome biding site in its Golden Braid compatible version from our [http://2018.igem.org/Team:Valencia_UPV/Part_Collection Part Collection]<html></li>
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<li></html>[https://parts.igem.org/Part:BBa_K2656022 BBa_K2656022]: This part.<html></li>
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<li></html>[https://parts.igem.org/Part:BBa_K2656026 BBa_K2656026]: the [https://parts.igem.org/Part:BBa_B0015 B0015] transcriptional terminator in its Golden Braid compatible version from our [http://2018.igem.org/Team:Valencia_UPV/Part_Collection Part Collection]<html></li>
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</ul>
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</html>
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In order to carry out a correct characterization of the protein and to be able to use it to make measurements of the different transcriptional units that we assembled with it, we have obtained the emission and excitation spectra in the conditions of our equipment. By using this [http://2018.igem.org/Team:Valencia_UPV/Experiments#spectra protocol] with the parameters of Table 1, Figure 1 was obtained.
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{|class='wikitable'
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|'''Parameter'''
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|'''Value'''
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|-
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|Number of samples
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|6
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|-
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|Excitation Wavelength measurement range (nm)
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|[430-520]
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|-
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|Emission wavelenght (nm)
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|545
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|-
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|Emission Wavelength measurement range (nm)
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|[490-580]
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|-
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|Excitation wavelenght (nm)
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|475
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|-
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|Gain (G)
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|70
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|-
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|colspan=4|Table 1. Parameters used to obtain the spectra
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|-
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|}
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[[File:T--Valencia_UPV--GFP_spectrum.png|900px|thumb|none|alt=GFP spectra.|Figure 1. GFP emission and excitation spectra]]
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<h2> <b> SBS_NY 2019 - Characterization </b> </h2>
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We used GFP as a critical reporter gene in our heavy metal biosensor and built four plasmids with GFP expression driven by MerR-GFP like heavy metal inducible repressors:
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CadR-GFP BBa_K3194007
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MerR-GFP BBa_K3194008
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CueR-GFP BBa_K3194009
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ZntR-GFP BBa_K3194010
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https://2019.igem.org/wiki/images/7/73/T--SBS_NY--zntR-GFP.png
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Under the relatively low concentration levels in our experiment, heavy metal cations didn't have an observable effect on GFP activity and signal strength.
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Also, we designed a Low-Cost, all-solid-state GFP sensor and used its prototype measured the fluorescent output of BBa_E0040.
  
 
===Usage and Biology===
 
===Usage and Biology===
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#Cormack pmid=10659856
 
#Cormack pmid=10659856
 
</biblio>
 
</biblio>
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Allergen characterization of BBa_E0040
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The Baltimore Biocrew 2017 team discovered that proteins generated through biobrick parts can be evaluated for allergenicity. This information is important to the people using these parts in the lab, as well as when considering using the protein for mass production, or using in the environment. The allergenicity test permits a comparison between the sequences of the biobrick parts and the identified allergen proteins enlisted in a data base.The higher the similarity between the biobricks and the proteins, the more likely the biobrick is allergenic cross-reactive. In the full-length alignments by FASTA, 30% or more amount of similarity signifies that the biobrick has a Precaution Status meaning there is a potential risk with using the part. A 50% or more amount of identity signifies that the biobrick has a Possible Allergen Status. In the sliding window of 80 amino acid segments, greater than 35% signifies similarity to allergens. The percentage of similarity implies the potential of harm biobricks’ potential negative impact to exposed populations. For more information on how to assess your own biobrick part please see the “Allergenicity  Testing Protocol” in the following page http://2017.igem.org/Team:Baltimore_Bio-Crew/Experiments
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For the biobrick part, BBa_E0040, there was a 28.7% of identity match and 47.1% of similarity match compared to the top allergen in the database. This means that the biobrick part is NOT of potential allergen status. In the 80 amino acid alignments by FASTA, no matches found that are greater than 35% for this biobrick.
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>Internal Priming Screening Characterization of BBa_E0040: Has no possible internal priming sites between this BioBrick part and the VF2 or the VR primer.
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The 2018 Hawaii iGEM team evaluated the 40 most frequently used BioBricks and ran them through an internal priming screening process that we developed using the BLAST program tool. Out of the 40 BioBricks we evaluated, 10 of them showed possible internal priming of either the VF2 or VR primers and sometime even both. The data set has a range of sequence lengths from as small as 12 bases to as large as 1,210 bases. We experienced the issue of possible internal priming during the sequence verification process of our own BBa_K2574001 BioBrick and in the cloning process to express the part as a fusion protein. BBa_K2574001 is a composite part containing a VLP forming Gag protein sequence attached to a frequently used RFP part (BBa_E1010). We conducted a PCR amplification of the Gag-RFP insert using the VF2 and VR primers on the ligation product (pSB1C3 ligated to the Gag + RFP). This amplicon would serve as template for another PCR where we would add the NcoI and BamHI restriction enzyme sites through new primers for ligation into pET14b and subsequent induced expression. Despite gel confirming a rather large, approximately 2.1 kb insert band, our sequencing results with the VR primer and BamHI RFP reverse primer gave mixed results. Both should have displayed the end of the RFP, but the VR primer revealed the end of the Gag. Analysis of the VR primer on the Gag-RFP sequence revealed several sites where the VR primer could have annealed with ~9 - 12 bp of complementarity. Internal priming of forward and reverse primers can be detrimental to an iGEM project because you can never be sure if the desired construct was correctly inserted into the BioBrick plasmid without a successful sequence verification.
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===Part Characteristics in [[Chassis/Cell-Free_Systems|Cell-Free Chassis]]===
 
===Part Characteristics in [[Chassis/Cell-Free_Systems|Cell-Free Chassis]]===
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[[Image:E0040 invitro deglog.png|thumb|none|500px|Semi-log plot of GFP degradation at different GFP concentrations]]<br clear="all">
 
[[Image:E0040 invitro deglog.png|thumb|none|500px|Semi-log plot of GFP degradation at different GFP concentrations]]<br clear="all">
 
From the semi-log plot, the degradation constant (in minutes) was derived to be 0.0003501, which is equivalent to GFPmut3b having a half-life of 33 hours in the cell-free chassis.
 
From the semi-log plot, the degradation constant (in minutes) was derived to be 0.0003501, which is equivalent to GFPmut3b having a half-life of 33 hours in the cell-free chassis.
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====Expression of GFP-mut3b in cell lysate====
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Cell-free GFP-mut3b synthesis was analyzed in self-made E.Coli lysate from strain BL21(DE3). Fluorescence was measured at 37°C for five hours on a plate reader. For details on how the lysate and the energy solution were made and which components went into the final reaction volume of 10uL, check out our [http://2017.igem.org/Team:EPFL/Protocols protocols]. Shown are three repeats with a negative control as well as a shaded error graph (control was subtracted) summarizing the result. GFP-mut3b expression yields high signals in lysate and thus is a good choice of reporter while working on a cell-free chassis. Saturation occurs after about five hours.
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[[Image:T--EPFL--page gfp bl21.png|thumb|center|500px|Three repeats and control of GFP-mut3b  expression in cell lysate.]]
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[[Image:Gfp bl21 shadederror.png|thumb|center|500px|Shaded error graph of GFP-mut3b expression in cell lysate (control was subtracted).]]
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<h2> <b> IIT Delhi 2017 - Characterization of Photobleaching </b> </h2>
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<p> Photobleaching is the phenomenon of irreversible damage to the fluorophore, such that after certain number of electronic transitions on absorption of photons, it cannot fluoresce anymore. This hinders the ability to continuously image a sample over a long period of time, thus acting as a bottleneck to the characterization pipeline. Therefore, it is of paramount importance to understand and characterize the bleaching effect so that an optimum time gap between successive images could be chosen. This would ensure that the fluorophores do not bleach and at the same time we don’t have to compromise on the amount of collected data due to the time gap. </p>
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<p> Here, we characterize the photobleaching effect in wildtype GFP (E0040) using fluorescent microscopy with the etaluma Lumascope 500 microscope. Cells expressing GFP under the PhlF repressible promoter (BBa_K2525016) in the absence of PhlF, so that it constitutively expressed GFP. Cells were loaded in microfluidic chambers and droplet encapsulation was performed to capture a small number of cells. This droplet was continuously exposed to light corresponding to the excitation wavelength of GFP (~485 nm) and the emission was captured continuously as well. The real time video for photobleaching in the cells encapsulated in the droplet is shown in GIF 1. ImageJ was used to analyze the images to obtain the rate of photobleaching as shown in Fig 1. Where we have fitted an exponential curve to the total intensity over time. It is known that photobleaching has a first order decay. We obtain a photobleaching rate of 0.002 per second (7.2 per hour). </p>
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[[File:Photobleach_GIF.gif|900px|thumb|left|GIF. 1 Real time video showing photobleaching in cells encapsulated in a droplet. To access the video in the GIF you'll have to visit the GIF at its link on the wiki; for that, click twice over the image in succession.]]
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[[File:Plate_reader_1.png|900px|thumb|left|Fig. 1 Total Intensity in the encapsulated droplet over time. Since photobleaching is known to be a first order process, we have fitted an exponential curve to the data. The high R-squared value implies a good fit of the exponential model to the data. The rate of photobleaching turns out to be 0.002 per second (7.2 per hour).]]
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<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
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<h2> <b> Amazonas_Brazil team - Caracterization in  E. coli Nissle 1917 </b> </h2>
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===Characterization===
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Escherichia coli Nissle 1917 (EcN) is widely used as a probiotic since it’s discovery in the second half of the 19th century by Alfred Nissle1 and although many iGEM teams had worked with this bacteria, we couldn’t find any specific characterization about the manipulation of EcN. To improve the quality of our work and provide data for other teams or researchers that might want to work with this bacteria in their laboratory, we characterized EcN growth curve and it’s behavior when transformed by electroporation with the iGEM vector pSB1C3 with GFP and RFP. <br>
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E. coli Nissle 1917 strains were grown overnight in Lysogeny Broth (LB) containing ampicilin (100 µg/mL) at 37°C and 200 rpm. Cultures were diluted in fresh LB until achieve 0,1 OD with the corresponding antibiotic and transferred to a 96-well plate (50 µL/well). Samples were always made in triplicates and a blank of LB. During 8h the absorbance at OD600 and fluorescence (excitation 504 nm and emission 515 nm) were measured with intervals of 1 hour.<br>
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<html>
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<img src="https://2019.igem.org/wiki/images/7/70/T--Amazonas-Brazil--gfppucpsb1c3.png"width="600"/>
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</html><BR>
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Fig. 1. Fluorescence values of E. coli Nissle 1917 curve(w/v)<BR>
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<h2> <b> Kyoto 2018 - Characterization </b> </h2>
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<p>We tested nonspecifically interaction of GFP(E0040) by immunoprecipitation for characterization.
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The figure shows the result of immunoprecipitation by GFPnanobody.(link)
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Without GFP’s band, we can see same bands pattern in lane 2 and 6.
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This result shows GFP has no nonspecifically interaction with proteins of S.cerevisiae under physiological salt concentration. So, there is no problem when we identify the location of localized proteins that fused with this GFP.
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Otherwise, in lane 8, there is a unique band.(④) This band might shows GFP’s nonspecifically interaction under high salt concentrations. So, when we use this part, we have to experiment under physiological salt concentration.</p>
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[[File:T--Kyoto--GFP IP.png|900px]]
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Secondly,TDH3 promoter and CYC1 terminator were added to both ends of ORF and cloned into pRS316 which is a shuttle vector of S. cerevisiae and E. coli. The resulting plasmid was transformed into wild-type yeast strain BY 4741 to overexpress GFP in yeast.
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Photographs of pellets recovered from the culture medium of yeast cells is below.As can be easily seen, the yeast pellet overexpressing GFP was colored in a pale yellow color.From this, it was confirmed that GFP of BBa_E0040 can be expressed in large amounts in yeast cells without changing the codon and that the expression level thereof is so large as to be visually observed under visible light without breaking the yeast.<br>
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[[File:T--Kyoto--Yeast GFPRFP.jpeg|300px]]
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====Improvements====
 
====Improvements====
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• <i>Chlamydomonas reinhardtii</i> chloroplast optimised: <html><a href="https://parts.igem.org/Part:BBa_K2148009" target="_blank">BBa_K2148009</a> <br>•
 
Yeast- and FACS optimized GFP: <html><a href="https://parts.igem.org/Part:BBa_K194001" target="_blank">BBa_K194001</a>
 
Yeast- and FACS optimized GFP: <html><a href="https://parts.igem.org/Part:BBa_K194001" target="_blank">BBa_K194001</a>
Yeast- and FACS optimized, fast degradable GFP: <html><a href="https://parts.igem.org/Part:BBa_K194002" target="_blank">BBa_K194002</a>
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<br>• Yeast- and FACS optimized, fast degradable GFP: <html><a href="https://parts.igem.org/Part:BBa_K194002" target="_blank">BBa_K194002</a><br>• RFC[1000] compatible GFP: <html><a href="https://parts.igem.org/Part:BBa_K2294444" target="_blank">BBa_K2294444</a>
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<br>
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<h2> <b>Improved by BNU-China 2019</b> </h2>
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We design a device for increasing the degradation rate of green fluorescent protein (GFP) by adding a 16-amino-acid-long tag replication protein A (RepA) at the N-terminal, therefore the green fluorescence will degrade sooner when expression ends. Please view  <html><a href="https://parts.igem.org/Part:BBa_K3036006" target="_blank">BBa_K3036006</a> for more details<br>
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<br><br><html><!--- Please copy this table containing parameters for BBa_E0040 at the end of the parametrs section ahead of the references. ---><style type="text/css">table#AutoAnnotator {border:1px solid black; width:100%; border-collapse:collapse;} th#AutoAnnotatorHeader { border:1px solid black; width:100%; background-color: rgb(221, 221, 221);} td.AutoAnnotator1col { width:100%; border:1px solid black; } span.AutoAnnotatorSequence { font-family:'Courier New', Arial; } td.AutoAnnotatorSeqNum { text-align:right; width:2%; } td.AutoAnnotatorSeqSeq { width:98% } td.AutoAnnotatorSeqFeat1 { width:3% } td.AutoAnnotatorSeqFeat2a { width:27% } td.AutoAnnotatorSeqFeat2b { width:97% } td.AutoAnnotatorSeqFeat3 { width:70% } table.AutoAnnotatorNoBorder { border:0px; width:100%; border-collapse:collapse; } table.AutoAnnotatorWithBorder { border:1px solid black; width:100%; border-collapse:collapse; } td.AutoAnnotatorOuterAmino { border:0px solid black; width:20% } td.AutoAnnotatorInnerAmino { border:1px solid black; width:50% } td.AutoAnnotatorAminoCountingOuter { border:1px solid black; width:40%;  } td.AutoAnnotatorBiochemParOuter { border:1px solid black; width:60%; } td.AutoAnnotatorAminoCountingInner1 { width: 7.5% } td.AutoAnnotatorAminoCountingInner2 { width:62.5% } td.AutoAnnotatorAminoCountingInner3 { width:30% } td.AutoAnnotatorBiochemParInner1 { width: 5% } td.AutoAnnotatorBiochemParInner2 { width:55% } td.AutoAnnotatorBiochemParInner3 { width:40% } td.AutoAnnotatorCodonUsage1 { width: 3% } td.AutoAnnotatorCodonUsage2 { width:14.2% } td.AutoAnnotatorCodonUsage3 { width:13.8% } td.AutoAnnotatorAlignment1 { width: 3% } td.AutoAnnotatorAlignment2 { width: 10% } td.AutoAnnotatorAlignment3 { width: 87% } td.AutoAnnotatorLocalizationOuter {border:1px solid black; width:40%} td.AutoAnnotatorGOOuter {border:1px solid black; width:60%} td.AutoAnnotatorLocalization1 { width: 7.5% } td.AutoAnnotatorLocalization2 { width: 22.5% } td.AutoAnnotatorLocalization3 { width: 70% } td.AutoAnnotatorGO1 { width: 5% } td.AutoAnnotatorGO2 { width: 35% } td.AutoAnnotatorGO3 { width: 60% } td.AutoAnnotatorPredFeat1 { width:3% } td.AutoAnnotatorPredFeat2a { width:27% } td.AutoAnnotatorPredFeat3 { width:70% } div.AutoAnnotator_trans { position:absolute; background:rgb(11,140,143); background-color:rgba(11,140,143, 0.8); height:5px; top:100px; } div.AutoAnnotator_sec_helix { position:absolute; background:rgb(102,0,102); background-color:rgba(102,0,102, 0.8); height:5px; top:110px; } div.AutoAnnotator_sec_strand { position:absolute; background:rgb(245,170,26); background-color:rgba(245,170,26, 1); height:5px; top:110px; } div.AutoAnnotator_acc_buried { position:absolute; background:rgb(89,168,15); background-color:rgba(89,168,15, 0.8); height:5px; top:120px; } div.AutoAnnotator_acc_exposed { position:absolute; background:rgb(0, 0, 255); background-color:rgba(0, 0, 255, 0.8); height:5px; top:120px; } div.AutoAnnotator_dis { position:absolute; text-align:center; font-family:Arial,Helvetica,sans-serif; background:rgb(255, 200, 0); background-color:rgba(255, 200, 0, 1); height:16px; width:16px; top:80px; border-radius:50%; } </style><table id="AutoAnnotator"><tr><!-- Time stamp in ms since 1/1/1970 1380155648870 --><th id="AutoAnnotatorHeader" colspan="2">Protein data table for BioBrick <a href="https://parts.igem.org/wiki/index.php?title=Part:BBa_E0040">BBa_E0040</a> automatically created by the <a href="http://2013.igem.org/Team:TU-Munich/Results/AutoAnnotator">BioBrick-AutoAnnotator</a> version 1.0</th></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Nucleotide sequence</strong> in <strong>RFC 10</strong>: (underlined part encodes the protein)<br><span class="AutoAnnotatorSequence">&nbsp;<u>ATGCGTAAA&nbsp;...&nbsp;CTATACAAA</u>TAATAA</span><br>&nbsp;<strong>ORF</strong> from nucleotide position 1 to 714 (excluding stop-codon)</td></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Amino acid sequence:</strong> (RFC 25 scars in shown in bold, other sequence features underlined; both given below)<br><span class="AutoAnnotatorSequence"><table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorSeqNum">1&nbsp;<br>101&nbsp;<br>201&nbsp;</td><td class="AutoAnnotatorSeqSeq">MRKGEELFTGVVPILVELDGDVNGHKFSVSGEGEGDATYGKLTLKFICTTGKLPVPWPTLVTTFGYGVQCFARYPDHMKQHDFFKSAMPEGYVQERTIFF<br>KDDGNYKTRAEVKFEGDTLVNRIELKGIDFKEDGNILGHKLEYNYNSHNVYIMADKQKNGIKVNFKIRHNIEDGSVQLADHYQQNTPIGDGPVLLPDNHY<br>LSTQSALSKDPNEKRDHMVLLEFVTAAGITHGMDELYK*</td></tr></table></span></td></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Sequence features:</strong> (with their position in the amino acid sequence, see the <a href="http://2013.igem.org/Team:TU-Munich/Results/Software/FeatureList">list of supported features</a>)<table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorSeqFeat1"></td><td class="AutoAnnotatorSeqFeat2b">None of the supported features appeared in the sequence</td></tr></table></td></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Amino acid composition:</strong><table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorOuterAmino"><table class="AutoAnnotatorWithBorder"><tr><td class="AutoAnnotatorInnerAmino">Ala (A)</td><td class="AutoAnnotatorInnerAmino">9 (3.8%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Arg (R)</td><td class="AutoAnnotatorInnerAmino">7 (2.9%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Asn (N)</td><td class="AutoAnnotatorInnerAmino">13 (5.5%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Asp (D)</td><td class="AutoAnnotatorInnerAmino">18 (7.6%)</td></tr></table></td><td class="AutoAnnotatorOuterAmino"><table class="AutoAnnotatorWithBorder"><tr><td class="AutoAnnotatorInnerAmino">Cys (C)</td><td class="AutoAnnotatorInnerAmino">2 (0.8%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Gln (Q)</td><td class="AutoAnnotatorInnerAmino">8 (3.4%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Glu (E)</td><td class="AutoAnnotatorInnerAmino">16 (6.7%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Gly (G)</td><td class="AutoAnnotatorInnerAmino">23 (9.7%)</td></tr></table></td><td class="AutoAnnotatorOuterAmino"><table class="AutoAnnotatorWithBorder"><tr><td class="AutoAnnotatorInnerAmino">His (H)</td><td class="AutoAnnotatorInnerAmino">10 (4.2%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Ile (I)</td><td class="AutoAnnotatorInnerAmino">12 (5.0%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Leu (L)</td><td class="AutoAnnotatorInnerAmino">19 (8.0%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Lys (K)</td><td class="AutoAnnotatorInnerAmino">20 (8.4%)</td></tr></table></td><td class="AutoAnnotatorOuterAmino"><table class="AutoAnnotatorWithBorder"><tr><td class="AutoAnnotatorInnerAmino">Met (M)</td><td class="AutoAnnotatorInnerAmino">6 (2.5%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Phe (F)</td><td class="AutoAnnotatorInnerAmino">13 (5.5%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Pro (P)</td><td class="AutoAnnotatorInnerAmino">10 (4.2%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Ser (S)</td><td class="AutoAnnotatorInnerAmino">8 (3.4%)</td></tr></table></td><td class="AutoAnnotatorOuterAmino"><table class="AutoAnnotatorWithBorder"><tr><td class="AutoAnnotatorInnerAmino">Thr (T)</td><td class="AutoAnnotatorInnerAmino">15 (6.3%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Trp (W)</td><td class="AutoAnnotatorInnerAmino">1 (0.4%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Tyr (Y)</td><td class="AutoAnnotatorInnerAmino">11 (4.6%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Val (V)</td><td class="AutoAnnotatorInnerAmino">17 (7.1%)</td></tr></table></td></tr></table></td></tr><tr><td class="AutoAnnotatorAminoCountingOuter"><strong>Amino acid counting</strong><table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorAminoCountingInner1"></td><td class="AutoAnnotatorAminoCountingInner2">Total number:</td><td class="AutoAnnotatorAminoCountingInner3">238</td></tr><tr><td class="AutoAnnotatorAminoCountingInner1"></td><td class="AutoAnnotatorAminoCountingInner2">Positively charged (Arg+Lys):</td><td class="AutoAnnotatorAminoCountingInner3">27 (11.3%)</td></tr><tr><td class="AutoAnnotatorAminoCountingInner1"></td><td class="AutoAnnotatorAminoCountingInner2">Negatively charged (Asp+Glu):</td><td class="AutoAnnotatorAminoCountingInner3">34 (14.3%)</td></tr><tr><td class="AutoAnnotatorAminoCountingInner1"></td><td class="AutoAnnotatorAminoCountingInner2">Aromatic (Phe+His+Try+Tyr):</td><td class="AutoAnnotatorAminoCountingInner3">35 (14.7%)</td></tr></table></td><td class="AutoAnnotatorBiochemParOuter"><strong>Biochemical parameters</strong><table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorBiochemParInner1"></td><td class="AutoAnnotatorBiochemParInner2">Atomic composition:</td><td class="AutoAnnotatorBiochemParInner3">C<sub>1207</sub>H<sub>1853</sub>N<sub>321</sub>O<sub>362</sub>S<sub>8</sub></td></tr><tr><td class="AutoAnnotatorBiochemParInner1"></td><td class="AutoAnnotatorBiochemParInner2">Molecular mass [Da]:</td><td class="AutoAnnotatorBiochemParInner3">26909.4</td></tr><tr><td class="AutoAnnotatorBiochemParInner1"></td><td class="AutoAnnotatorBiochemParInner2">Theoretical pI:</td><td class="AutoAnnotatorBiochemParInner3">5.80</td></tr><tr><td class="AutoAnnotatorBiochemParInner1"></td><td class="AutoAnnotatorBiochemParInner2">Extinction coefficient at 280 nm [M<sup>-1</sup> cm<sup>-1</sup>]:</td><td class="AutoAnnotatorBiochemParInner3">21890 / 22015 (all Cys red/ox)</td></tr></table></td></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Plot for hydrophobicity, charge, predicted secondary structure, solvent accessability, transmembrane helices and disulfid bridges</strong>&nbsp;<input type='button' id='hydrophobicity_charge_button' onclick='show_or_hide_plot()' value='Show'><span id="hydrophobicity_charge_explanation"></span><div id="hydrophobicity_charge_container" style='display:none'><div id="hydrophobicity_charge_placeholder0" style="width:100%;height:150px"></div><div id="hydrophobicity_charge_placeholder1" style="width:100%;height:150px"></div></div></td></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Codon usage</strong><table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorCodonUsage1"></td><td class="AutoAnnotatorCodonUsage2">Organism:</td><td class="AutoAnnotatorCodonUsage3"><i>E. coli</i></td><td class="AutoAnnotatorCodonUsage3"><i>B. subtilis</i></td><td class="AutoAnnotatorCodonUsage3"><i>S. cerevisiae</i></td><td class="AutoAnnotatorCodonUsage3"><i>A. thaliana</i></td><td class="AutoAnnotatorCodonUsage3"><i>P. patens</i></td><td class="AutoAnnotatorCodonUsage3">Mammals</td></tr><tr><td class="AutoAnnotatorCodonUsage1"></td><td class="AutoAnnotatorCodonUsage2">Codon quality (<a href="http://en.wikipedia.org/wiki/Codon_Adaptation_Index">CAI</a>):</td><td class="AutoAnnotatorCodonUsage3">good (0.72)</td><td class="AutoAnnotatorCodonUsage3">good (0.76)</td><td class="AutoAnnotatorCodonUsage3">good (0.75)</td><td class="AutoAnnotatorCodonUsage3">excellent (0.82)</td><td class="AutoAnnotatorCodonUsage3">good (0.77)</td><td class="AutoAnnotatorCodonUsage3">good (0.68)</td></tr></table></td></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Alignments</strong> (obtained from <a href='http://predictprotein.org'>PredictProtein.org</a>)<table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorAlignment1"></td><td class="AutoAnnotatorAlignment2">SwissProt:</td><td class="AutoAnnotatorAlignment3"><a href='http://www.uniprot.org/uniprot/P42212'>P42212</a> (98% identity on 238 AAs), <a href='http://www.uniprot.org/uniprot/Q9U6Y3'>Q9U6Y3</a> (25% identity on 217 AAs)</td></tr><tr><td class="AutoAnnotatorAlignment1"></td><td class="AutoAnnotatorAlignment2">TrEML:</td><td class="AutoAnnotatorAlignment3"><a href='http://www.uniprot.org/uniprot/B6UPG7'>B6UPG7</a> (99% identity on 238 AAs), <a href='http://www.uniprot.org/uniprot/B9U1C3'>B9U1C3</a> (98% identity on 238 AAs), <a href='http://www.uniprot.org/uniprot/J8VIQ3'>J8VIQ3</a> (98% identity on 238 AAs), <a href='http://www.uniprot.org/uniprot/Q71RY9'>Q71RY9</a> (98% identity on 238 AAs), <a href='http://www.uniprot.org/uniprot/Q8GHE2'>Q8GHE2</a> (98% identity on 238 AAs)</td></tr><tr><td class="AutoAnnotatorAlignment1"></td><td class="AutoAnnotatorAlignment2">PDB:</td><td class="AutoAnnotatorAlignment3"><a href='http://www.rcsb.org/pdb/explore/explore.do?structureId=1gfl'>1gfl</a> (98% identity on 229 AAs), <a href='http://www.rcsb.org/pdb/explore/explore.do?structureId=3vht'>3vht</a> (98% identity on 228 AAs)</td></tr></table></td></tr><tr><th id='AutoAnnotatorHeader' colspan="2"><strong>Predictions</strong> (obtained from <a href='http://predictprotein.org'>PredictProtein.org</a>)</th></tr><tr><td class="AutoAnnotatorLocalizationOuter"><strong>Subcellular Localization</strong> (reliability in brackets)<table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorLocalization1"></td><td class="AutoAnnotatorLocalization2">Archaea:</td><td class="AutoAnnotatorLocalization3">secreted (99%)</td></tr><tr><td class="AutoAnnotatorLocalization1"></td><td class="AutoAnnotatorLocalization2">Bacteria:</td><td class="AutoAnnotatorLocalization3">cytosol (62%)</td></tr><tr><td class="AutoAnnotatorLocalization1"></td><td class="AutoAnnotatorLocalization2">Eukarya:</td><td class="AutoAnnotatorLocalization3">cytosol (36%)</td></tr></table></td><td class="AutoAnnotatorGOOuter"><strong>Gene Ontology</strong> (reliability in brackets)<br><table class="AutoAnnotatorNoBorder"><tr><td class='AutoAnnotatorGO1'></td><td class='AutoAnnotatorGO2'>Molecular Function Ontology:</td><td class='AutoAnnotatorGO3'> - </td></tr><tr><td class='AutoAnnotatorGO1'></td><td class='AutoAnnotatorGO2'>Biological Process Ontology:</td><td class='AutoAnnotatorGO3'><a href='http://amigo.geneontology.org/cgi-bin/amigo/term_details?term=GO:0018298'>GO:0018298</a> (45%), <a href='http://amigo.geneontology.org/cgi-bin/amigo/term_details?term=GO:0008218'>GO:0008218</a> (32%)</td></tr><tr><td class='AutoAnnotatorGO1'> </td><td class='AutoAnnotatorGO2'> </td><td class='AutoAnnotatorGO3'>&nbsp;</td></tr></table></td></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Predicted features:</strong><table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorPredFeat1"></td><td class="AutoAnnotatorPredFeat2a">Disulfid bridges:</td><td class="AutoAnnotatorPredFeat3">&nbsp;- </td></tr><tr><td class="AutoAnnotatorPredFeat1"></td><td class="AutoAnnotatorPredFeat2a">Transmembrane helices:</td><td class="AutoAnnotatorPredFeat3">&nbsp;- </td></tr></table></td></tr><tr><td class="AutoAnnotator1col" colspan="2"> The BioBrick-AutoAnnotator was created by <a href="http://2013.igem.org/Team:TU-Munich">TU-Munich 2013</a> iGEM team. For more information please see the <a href="http://2013.igem.org/Team:TU-Munich/Results/Software">documentation</a>.<br>If you have any questions, comments or suggestions, please leave us a <a href="http://2013.igem.org/Team:TU-Munich/Results/AutoAnnotator">comment</a>.</td></tr></table><br><!-- IMPORTANT: DON'T REMOVE THIS LINE, OTHERWISE NOT SUPPORTED FOR IE BEFORE 9 --><!--[if lte IE 8]><script language="javascript" type="text/javascript" src="excanvas.min.js"></script><![endif]--><script type='text/javascript' src='http://code.jquery.com/jquery-1.10.0.min.js'></script><script type='text/javascript' src='http://2013.igem.org/Team:TU-Munich/Flot.js?action=raw&ctype=text/js'></script><script>var hydrophobicity_datapoints = 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charge_datapoints = 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border:1px solid black; width:50% } td.AutoAnnotatorAminoCountingOuter { border:1px solid black; width:40%;  } td.AutoAnnotatorBiochemParOuter { border:1px solid black; width:60%; } td.AutoAnnotatorAminoCountingInner1 { width: 7.5% } td.AutoAnnotatorAminoCountingInner2 { width:62.5% } td.AutoAnnotatorAminoCountingInner3 { width:30% } td.AutoAnnotatorBiochemParInner1 { width: 5% } td.AutoAnnotatorBiochemParInner2 { width:55% } td.AutoAnnotatorBiochemParInner3 { width:40% } td.AutoAnnotatorCodonUsage1 { width: 3% } td.AutoAnnotatorCodonUsage2 { width:14.2% } td.AutoAnnotatorCodonUsage3 { width:13.8% } td.AutoAnnotatorAlignment1 { width: 3% } td.AutoAnnotatorAlignment2 { width: 10% } td.AutoAnnotatorAlignment3 { width: 87% } td.AutoAnnotatorLocalizationOuter {border:1px solid black; width:40%} td.AutoAnnotatorGOOuter {border:1px solid black; width:60%} td.AutoAnnotatorLocalization1 { width: 7.5% } td.AutoAnnotatorLocalization2 { width: 22.5% } td.AutoAnnotatorLocalization3 { width: 70% } td.AutoAnnotatorGO1 { width: 5% } td.AutoAnnotatorGO2 { width: 35% } td.AutoAnnotatorGO3 { width: 60% } td.AutoAnnotatorPredFeat1 { width:3% } td.AutoAnnotatorPredFeat2a { width:27% } td.AutoAnnotatorPredFeat3 { width:70% } div.AutoAnnotator_trans { position:absolute; background:rgb(11,140,143); background-color:rgba(11,140,143, 0.8); height:5px; top:100px; } div.AutoAnnotator_sec_helix { position:absolute; background:rgb(102,0,102); background-color:rgba(102,0,102, 0.8); height:5px; top:110px; } div.AutoAnnotator_sec_strand { position:absolute; background:rgb(245,170,26); background-color:rgba(245,170,26, 1); height:5px; top:110px; } div.AutoAnnotator_acc_buried { position:absolute; background:rgb(89,168,15); background-color:rgba(89,168,15, 0.8); height:5px; top:120px; } div.AutoAnnotator_acc_exposed { position:absolute; background:rgb(0, 0, 255); background-color:rgba(0, 0, 255, 0.8); height:5px; top:120px; } div.AutoAnnotator_dis { position:absolute; text-align:center; font-family:Arial,Helvetica,sans-serif; background:rgb(255, 200, 0); background-color:rgba(255, 200, 0, 1); height:16px; width:16px; top:80px; border-radius:50%; } </style><table id="AutoAnnotator"><tr><!-- Time stamp in ms since 1/1/1970 1380155648870 --><th id="AutoAnnotatorHeader" colspan="2">Protein data table for BioBrick <a href="https://parts.igem.org/wiki/index.php?title=Part:BBa_E0040">BBa_E0040</a> automatically created by the <a href="http://2013.igem.org/Team:TU-Munich/Results/AutoAnnotator">BioBrick-AutoAnnotator</a> version 1.0</th></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Nucleotide sequence</strong> in <strong>RFC 10</strong>: (underlined part encodes the protein)<br><span class="AutoAnnotatorSequence">&nbsp;<u>ATGCGTAAA&nbsp;...&nbsp;CTATACAAA</u>TAATAA</span><br>&nbsp;<strong>ORF</strong> from nucleotide position 1 to 714 (excluding stop-codon)</td></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Amino acid sequence:</strong> (RFC 25 scars in shown in bold, other sequence features underlined; both given below)<br><span class="AutoAnnotatorSequence"><table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorSeqNum">1&nbsp;<br>101&nbsp;<br>201&nbsp;</td><td class="AutoAnnotatorSeqSeq">MRKGEELFTGVVPILVELDGDVNGHKFSVSGEGEGDATYGKLTLKFICTTGKLPVPWPTLVTTFGYGVQCFARYPDHMKQHDFFKSAMPEGYVQERTIFF<br>KDDGNYKTRAEVKFEGDTLVNRIELKGIDFKEDGNILGHKLEYNYNSHNVYIMADKQKNGIKVNFKIRHNIEDGSVQLADHYQQNTPIGDGPVLLPDNHY<br>LSTQSALSKDPNEKRDHMVLLEFVTAAGITHGMDELYK*</td></tr></table></span></td></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Sequence features:</strong> (with their position in the amino acid sequence, see the <a href="http://2013.igem.org/Team:TU-Munich/Results/Software/FeatureList">list of supported features</a>)<table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorSeqFeat1"></td><td class="AutoAnnotatorSeqFeat2b">None of the supported features appeared in the sequence</td></tr></table></td></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Amino acid composition:</strong><table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorOuterAmino"><table class="AutoAnnotatorWithBorder"><tr><td class="AutoAnnotatorInnerAmino">Ala (A)</td><td class="AutoAnnotatorInnerAmino">9 (3.8%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Arg (R)</td><td class="AutoAnnotatorInnerAmino">7 (2.9%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Asn (N)</td><td class="AutoAnnotatorInnerAmino">13 (5.5%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Asp (D)</td><td class="AutoAnnotatorInnerAmino">18 (7.6%)</td></tr></table></td><td class="AutoAnnotatorOuterAmino"><table class="AutoAnnotatorWithBorder"><tr><td class="AutoAnnotatorInnerAmino">Cys (C)</td><td class="AutoAnnotatorInnerAmino">2 (0.8%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Gln (Q)</td><td class="AutoAnnotatorInnerAmino">8 (3.4%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Glu (E)</td><td class="AutoAnnotatorInnerAmino">16 (6.7%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Gly (G)</td><td class="AutoAnnotatorInnerAmino">23 (9.7%)</td></tr></table></td><td class="AutoAnnotatorOuterAmino"><table class="AutoAnnotatorWithBorder"><tr><td class="AutoAnnotatorInnerAmino">His (H)</td><td class="AutoAnnotatorInnerAmino">10 (4.2%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Ile (I)</td><td class="AutoAnnotatorInnerAmino">12 (5.0%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Leu (L)</td><td class="AutoAnnotatorInnerAmino">19 (8.0%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Lys (K)</td><td class="AutoAnnotatorInnerAmino">20 (8.4%)</td></tr></table></td><td class="AutoAnnotatorOuterAmino"><table class="AutoAnnotatorWithBorder"><tr><td class="AutoAnnotatorInnerAmino">Met (M)</td><td class="AutoAnnotatorInnerAmino">6 (2.5%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Phe (F)</td><td class="AutoAnnotatorInnerAmino">13 (5.5%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Pro (P)</td><td class="AutoAnnotatorInnerAmino">10 (4.2%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Ser (S)</td><td class="AutoAnnotatorInnerAmino">8 (3.4%)</td></tr></table></td><td class="AutoAnnotatorOuterAmino"><table class="AutoAnnotatorWithBorder"><tr><td class="AutoAnnotatorInnerAmino">Thr (T)</td><td class="AutoAnnotatorInnerAmino">15 (6.3%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Trp (W)</td><td class="AutoAnnotatorInnerAmino">1 (0.4%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Tyr (Y)</td><td class="AutoAnnotatorInnerAmino">11 (4.6%)</td></tr><tr><td class="AutoAnnotatorInnerAmino">Val (V)</td><td class="AutoAnnotatorInnerAmino">17 (7.1%)</td></tr></table></td></tr></table></td></tr><tr><td class="AutoAnnotatorAminoCountingOuter"><strong>Amino acid counting</strong><table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorAminoCountingInner1"></td><td class="AutoAnnotatorAminoCountingInner2">Total number:</td><td class="AutoAnnotatorAminoCountingInner3">238</td></tr><tr><td class="AutoAnnotatorAminoCountingInner1"></td><td class="AutoAnnotatorAminoCountingInner2">Positively charged (Arg+Lys):</td><td class="AutoAnnotatorAminoCountingInner3">27 (11.3%)</td></tr><tr><td class="AutoAnnotatorAminoCountingInner1"></td><td class="AutoAnnotatorAminoCountingInner2">Negatively charged (Asp+Glu):</td><td class="AutoAnnotatorAminoCountingInner3">34 (14.3%)</td></tr><tr><td class="AutoAnnotatorAminoCountingInner1"></td><td class="AutoAnnotatorAminoCountingInner2">Aromatic (Phe+His+Try+Tyr):</td><td class="AutoAnnotatorAminoCountingInner3">35 (14.7%)</td></tr></table></td><td class="AutoAnnotatorBiochemParOuter"><strong>Biochemical parameters</strong><table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorBiochemParInner1"></td><td class="AutoAnnotatorBiochemParInner2">Atomic composition:</td><td class="AutoAnnotatorBiochemParInner3">C<sub>1207</sub>H<sub>1853</sub>N<sub>321</sub>O<sub>362</sub>S<sub>8</sub></td></tr><tr><td class="AutoAnnotatorBiochemParInner1"></td><td class="AutoAnnotatorBiochemParInner2">Molecular mass [Da]:</td><td class="AutoAnnotatorBiochemParInner3">26909.4</td></tr><tr><td class="AutoAnnotatorBiochemParInner1"></td><td class="AutoAnnotatorBiochemParInner2">Theoretical pI:</td><td class="AutoAnnotatorBiochemParInner3">5.80</td></tr><tr><td class="AutoAnnotatorBiochemParInner1"></td><td class="AutoAnnotatorBiochemParInner2">Extinction coefficient at 280 nm [M<sup>-1</sup> cm<sup>-1</sup>]:</td><td class="AutoAnnotatorBiochemParInner3">21890 / 22015 (all Cys red/ox)</td></tr></table></td></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Plot for hydrophobicity, charge, predicted secondary structure, solvent accessability, transmembrane helices and disulfid bridges</strong>&nbsp;<input type='button' id='hydrophobicity_charge_button' onclick='show_or_hide_plot()' value='Show'><span id="hydrophobicity_charge_explanation"></span><div id="hydrophobicity_charge_container" style='display:none'><div id="hydrophobicity_charge_placeholder0" style="width:100%;height:150px"></div><div id="hydrophobicity_charge_placeholder1" style="width:100%;height:150px"></div></div></td></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Codon usage</strong><table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorCodonUsage1"></td><td class="AutoAnnotatorCodonUsage2">Organism:</td><td class="AutoAnnotatorCodonUsage3"><i>E. coli</i></td><td class="AutoAnnotatorCodonUsage3"><i>B. subtilis</i></td><td class="AutoAnnotatorCodonUsage3"><i>S. cerevisiae</i></td><td class="AutoAnnotatorCodonUsage3"><i>A. thaliana</i></td><td class="AutoAnnotatorCodonUsage3"><i>P. patens</i></td><td class="AutoAnnotatorCodonUsage3">Mammals</td></tr><tr><td class="AutoAnnotatorCodonUsage1"></td><td class="AutoAnnotatorCodonUsage2">Codon quality (<a href="http://en.wikipedia.org/wiki/Codon_Adaptation_Index">CAI</a>):</td><td class="AutoAnnotatorCodonUsage3">good (0.72)</td><td class="AutoAnnotatorCodonUsage3">good (0.76)</td><td class="AutoAnnotatorCodonUsage3">good (0.75)</td><td class="AutoAnnotatorCodonUsage3">excellent (0.82)</td><td class="AutoAnnotatorCodonUsage3">good (0.77)</td><td class="AutoAnnotatorCodonUsage3">good (0.68)</td></tr></table></td></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Alignments</strong> (obtained from <a href='http://predictprotein.org'>PredictProtein.org</a>)<table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorAlignment1"></td><td class="AutoAnnotatorAlignment2">SwissProt:</td><td class="AutoAnnotatorAlignment3"><a href='http://www.uniprot.org/uniprot/P42212'>P42212</a> (98% identity on 238 AAs), <a href='http://www.uniprot.org/uniprot/Q9U6Y3'>Q9U6Y3</a> (25% identity on 217 AAs)</td></tr><tr><td class="AutoAnnotatorAlignment1"></td><td class="AutoAnnotatorAlignment2">TrEML:</td><td class="AutoAnnotatorAlignment3"><a href='http://www.uniprot.org/uniprot/B6UPG7'>B6UPG7</a> (99% identity on 238 AAs), <a href='http://www.uniprot.org/uniprot/B9U1C3'>B9U1C3</a> (98% identity on 238 AAs), <a href='http://www.uniprot.org/uniprot/J8VIQ3'>J8VIQ3</a> (98% identity on 238 AAs), <a href='http://www.uniprot.org/uniprot/Q71RY9'>Q71RY9</a> (98% identity on 238 AAs), <a href='http://www.uniprot.org/uniprot/Q8GHE2'>Q8GHE2</a> (98% identity on 238 AAs)</td></tr><tr><td class="AutoAnnotatorAlignment1"></td><td class="AutoAnnotatorAlignment2">PDB:</td><td class="AutoAnnotatorAlignment3"><a href='http://www.rcsb.org/pdb/explore/explore.do?structureId=1gfl'>1gfl</a> (98% identity on 229 AAs), <a href='http://www.rcsb.org/pdb/explore/explore.do?structureId=3vht'>3vht</a> (98% identity on 228 AAs)</td></tr></table></td></tr><tr><th id='AutoAnnotatorHeader' colspan="2"><strong>Predictions</strong> (obtained from <a href='http://predictprotein.org'>PredictProtein.org</a>)</th></tr><tr><td class="AutoAnnotatorLocalizationOuter"><strong>Subcellular Localization</strong> (reliability in brackets)<table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorLocalization1"></td><td class="AutoAnnotatorLocalization2">Archaea:</td><td class="AutoAnnotatorLocalization3">secreted (99%)</td></tr><tr><td class="AutoAnnotatorLocalization1"></td><td class="AutoAnnotatorLocalization2">Bacteria:</td><td class="AutoAnnotatorLocalization3">cytosol (62%)</td></tr><tr><td class="AutoAnnotatorLocalization1"></td><td class="AutoAnnotatorLocalization2">Eukarya:</td><td class="AutoAnnotatorLocalization3">cytosol (36%)</td></tr></table></td><td class="AutoAnnotatorGOOuter"><strong>Gene Ontology</strong> (reliability in brackets)<br><table class="AutoAnnotatorNoBorder"><tr><td class='AutoAnnotatorGO1'></td><td class='AutoAnnotatorGO2'>Molecular Function Ontology:</td><td class='AutoAnnotatorGO3'> - </td></tr><tr><td class='AutoAnnotatorGO1'></td><td class='AutoAnnotatorGO2'>Biological Process Ontology:</td><td class='AutoAnnotatorGO3'><a href='http://amigo.geneontology.org/cgi-bin/amigo/term_details?term=GO:0018298'>GO:0018298</a> (45%), <a href='http://amigo.geneontology.org/cgi-bin/amigo/term_details?term=GO:0008218'>GO:0008218</a> (32%)</td></tr><tr><td class='AutoAnnotatorGO1'> </td><td class='AutoAnnotatorGO2'> </td><td class='AutoAnnotatorGO3'>&nbsp;</td></tr></table></td></tr><tr><td class="AutoAnnotator1col" colspan="2"><strong>Predicted features:</strong><table class="AutoAnnotatorNoBorder"><tr><td class="AutoAnnotatorPredFeat1"></td><td class="AutoAnnotatorPredFeat2a">Disulfid bridges:</td><td class="AutoAnnotatorPredFeat3">&nbsp;- </td></tr><tr><td class="AutoAnnotatorPredFeat1"></td><td class="AutoAnnotatorPredFeat2a">Transmembrane helices:</td><td class="AutoAnnotatorPredFeat3">&nbsp;- </td></tr></table></td></tr><tr><td class="AutoAnnotator1col" colspan="2"> The BioBrick-AutoAnnotator was created by <a href="http://2013.igem.org/Team:TU-Munich">TU-Munich 2013</a> iGEM team. For more information please see the <a href="http://2013.igem.org/Team:TU-Munich/Results/Software">documentation</a>.<br>If you have any questions, comments or suggestions, please leave us a <a href="http://2013.igem.org/Team:TU-Munich/Results/AutoAnnotator">comment</a>.</td></tr></table><br><!-- IMPORTANT: DON'T REMOVE THIS LINE, OTHERWISE NOT SUPPORTED FOR IE BEFORE 9 --><!--[if lte IE 8]><script language="javascript" type="text/javascript" src="excanvas.min.js"></script><![endif]--><script type='text/javascript' src='http://code.jquery.com/jquery-1.10.0.min.js'></script><script type='text/javascript' src='http://2013.igem.org/Team:TU-Munich/Flot.js?action=raw&ctype=text/js'></script><script>var hydrophobicity_datapoints = 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charge_datapoints = [[2.5,0.20],[3.5,0.00],[4.5,-0.20],[5.5,-0.40],[6.5,-0.40],[7.5,-0.20],[8.5,0.00],[9.5,0.00],[10.5,0.00],[11.5,0.00],[12.5,0.00],[13.5,0.00],[14.5,-0.20],[15.5,-0.20],[16.5,-0.40],[17.5,-0.40],[18.5,-0.60],[19.5,-0.40],[20.5,-0.40],[21.5,-0.20],[22.5,-0.10],[23.5,0.30],[24.5,0.30],[25.5,0.30],[26.5,0.30],[27.5,0.20],[28.5,-0.00],[29.5,-0.20],[30.5,-0.20],[31.5,-0.40],[32.5,-0.40],[33.5,-0.60],[34.5,-0.40],[35.5,-0.40],[36.5,-0.20],[37.5,-0.20],[38.5,0.20],[39.5,0.20],[40.5,0.20],[41.5,0.20],[42.5,0.40],[43.5,0.20],[44.5,0.20],[45.5,0.20],[46.5,0.20],[47.5,-0.00],[48.5,-0.00],[49.5,0.20],[50.5,0.20],[51.5,0.20],[52.5,0.20],[53.5,0.20],[54.5,-0.00],[55.5,-0.00],[56.5,-0.00],[57.5,-0.00],[58.5,-0.00],[59.5,-0.00],[60.5,-0.00],[61.5,-0.00],[62.5,-0.00],[63.5,-0.00],[64.5,-0.00],[65.5,-0.00],[66.5,-0.00],[67.5,-0.00],[68.5,-0.00],[69.5,-0.00],[70.5,0.20],[71.5,0.20],[72.5,0.20],[73.5,-0.00],[74.5,0.10],[75.5,-0.10],[76.5,0.10],[77.5,0.10],[78.5,0.40],[79.5,0.10],[80.5,0.10],[81.5,-0.10],[82.5,0.10],[83.5,-0.00],[84.5,0.20],[85.5,0.20],[86.5,0.20],[87.5,-0.20],[88.5,-0.20],[89.5,-0.20],[90.5,-0.20],[91.5,-0.20],[92.5,-0.20],[93.5,-0.00],[94.5,-0.00],[95.5,-0.00],[96.5,-0.00],[97.5,0.20],[98.5,0.20],[99.5,-0.00],[100.5,-0.20],[101.5,-0.20],[102.5,-0.20],[103.5,-0.40],[104.5,-0.00],[105.5,0.20],[106.5,0.40],[107.5,0.40],[108.5,0.20],[109.5,-0.00],[110.5,0.20],[111.5,-0.00],[112.5,-0.20],[113.5,-0.00],[114.5,-0.20],[115.5,-0.40],[116.5,-0.40],[117.5,-0.20],[118.5,-0.20],[119.5,0.20],[120.5,0.20],[121.5,-0.00],[122.5,-0.00],[123.5,0.20],[124.5,-0.00],[125.5,-0.00],[126.5,-0.00],[127.5,-0.00],[128.5,-0.00],[129.5,-0.20],[130.5,-0.40],[131.5,-0.20],[132.5,-0.20],[133.5,-0.40],[134.5,-0.20],[135.5,-0.00],[136.5,0.10],[137.5,0.30],[138.5,0.30],[139.5,0.10],[140.5,0.10],[141.5,-0.00],[142.5,-0.20],[143.5,-0.20],[144.5,-0.00],[145.5,0.10],[146.5,0.10],[147.5,0.10],[148.5,0.10],[149.5,0.10],[150.5,-0.00],[151.5,-0.00],[152.5,-0.20],[153.5,-0.00],[154.5,-0.00],[155.5,0.20],[156.5,0.20],[157.5,0.40],[158.5,0.20],[159.5,0.40],[160.5,0.20],[161.5,0.20],[162.5,0.20],[163.5,0.40],[164.5,0.20],[165.5,0.40],[166.5,0.50],[167.5,0.50],[168.5,0.30],[169.5,0.10],[170.5,-0.30],[171.5,-0.40],[172.5,-0.40],[173.5,-0.40],[174.5,-0.20],[175.5,-0.00],[176.5,-0.00],[177.5,-0.20],[178.5,-0.10],[179.5,-0.10],[180.5,-0.10],[181.5,-0.10],[182.5,0.10],[183.5,-0.00],[184.5,-0.00],[185.5,-0.00],[186.5,-0.00],[187.5,-0.20],[188.5,-0.20],[189.5,-0.20],[190.5,-0.20],[191.5,-0.20],[192.5,-0.00],[193.5,-0.00],[194.5,-0.20],[195.5,-0.20],[196.5,-0.10],[197.5,-0.10],[198.5,-0.10],[199.5,0.10],[200.5,0.10],[201.5,-0.00],[202.5,-0.00],[203.5,-0.00],[204.5,-0.00],[205.5,-0.00],[206.5,0.20],[207.5,-0.00],[208.5,-0.00],[209.5,-0.00],[210.5,-0.20],[211.5,-0.20],[212.5,0.20],[213.5,-0.00],[214.5,0.10],[215.5,0.30],[216.5,0.10],[217.5,-0.10],[218.5,0.10],[219.5,-0.20],[220.5,-0.20],[221.5,-0.20],[222.5,-0.20],[223.5,-0.20],[224.5,-0.00],[225.5,-0.00],[226.5,-0.00],[227.5,-0.00],[228.5,0.10],[229.5,0.10],[230.5,0.10],[231.5,-0.10],[232.5,-0.30],[233.5,-0.40],[234.5,-0.40],[235.5,-0.20]];var dis_datapoints = [];var trans_datapoints = [];var sec_helix_datapoints = [[5,9],[57,65],[84,86]];var sec_strand_datapoints = [[13,22],[25,31],[41,48],[70,72],[94,101],[105,114],[118,128],[139,140],[148,153],[160,171],[176,183],[200,200],[201,208],[217,228]];var acc_exposed_datapoints = [[1,6],[9,11],[13,13],[19,19],[23,23],[26,26],[32,32],[34,34],[36,36],[39,39],[41,41],[50,50],[52,52],[69,69],[73,73],[76,77],[79,80],[82,82],[85,85],[90,90],[101,101],[103,103],[113,113],[115,117],[126,126],[129,129],[132,133],[135,135],[138,138],[140,140],[142,142],[144,146],[155,159],[172,175],[180,180],[183,186],[189,192],[194,194],[197,197],[209,216],[230,230],[232,232],[234,235],[237,238]];var acc_buried_datapoints = [[8,8],[12,12],[14,14],[16,16],[18,18],[20,20],[22,22],[24,24],[27,27],[29,29],[31,31],[33,33],[35,35],[40,40],[42,42],[44,44],[46,46],[48,48],[53,64],[67,68],[70,72],[75,75],[83,84],[87,88],[91,92],[97,98],[100,100],[104,104],[106,106],[108,108],[112,112],[114,114],[119,119],[123,123],[125,125],[127,127],[130,130],[134,134],[136,137],[150,150],[152,152],[161,161],[163,163],[165,165],[167,169],[171,171],[179,179],[181,181],[193,193],[195,196],[199,200],[201,201],[203,203],[205,205],[207,207],[218,218],[220,220],[222,222],[224,224],[226,226]];var flot_plot_options = []; flot_plot_options[0] = {grid: {borderWidth: {top: 0,right: 0,bottom: 0,left: 0}},legend: {show: false},xaxes: [{show: true,min: 0,max: 200,ticks: [[0.5, '1'], [24.5, '25'], [49.5, '50'], [74.5, '75'], [99.5, '100'], [124.5, '125'], [149.5, '150'], [174.5, '175'], [199.5, '200']],tickLength: -5}],yaxes: [{show: true,ticks: [[0, '0'], [4.5,'hydro-<br>phobic&nbsp;&nbsp;'], [-4.5,'hydro-<br>philic&nbsp;&nbsp;']],min: 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[plot_num*200 + 149.5, (plot_num*200 + 150).toString()], [plot_num*200 + 174.5, (plot_num*200 + 175).toString()], [plot_num*200 + 199.5, (plot_num*200 + 200).toString()] ],tickLength: -5}];};function show_or_hide_plot(){try {if( $('#hydrophobicity_charge_button').val() =='Show' ){$('#hydrophobicity_charge_container').css('display','block');$('#hydrophobicity_charge_button').val('Hide');var description_html = '<div id=\'AutoAnnotator_plot_selectors\'>';description_html = description_html + '<br>&nbsp;<input type=\'checkbox\' id=\'hydrophobicity_checkbox\' checked=\'checked\'>&nbsp;Moving average over 5 amino acids for hydrophobicity (<img src=\'https://static.igem.org/mediawiki/2013/e/e9/TUM13_hydrophobicity_icon.png\' alt=\'blue graph\' height=\'10\'></img>)';description_html = description_html + '<br>&nbsp;<input type=\'checkbox\' id=\'charge_checkbox\' checked=\'checked\'>&nbsp;Moving average over 5 amino acids for charge (<img 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beta-strands (<img src=\'https://static.igem.org/mediawiki/2013/b/bf/TUM13_strand_icon.png\' alt=\'yellow bars\' height=\'10\'></img>)';description_html = description_html + '<br>&nbsp;<input type=\'checkbox\' id=\'acc_checkbox\' checked=\'checked\'>&nbsp;Predicted solvent accessability: Exposed (<img src=\'https://static.igem.org/mediawiki/2013/1/16/TUM13_exposed_icon.png\' alt=\'blue bars\' height=\'10\'></img>) and buried (<img src=\'https://static.igem.org/mediawiki/2013/0/0b/TUM13_buried_icon.png\' alt=\'green bars\' height=\'10\'></img>) residues';description_html = description_html + '<br></div>';$('#hydrophobicity_charge_explanation').html(description_html);plot_according_to_selectors();$('#AutoAnnotator_plot_selectors').find('input').click(plot_according_to_selectors);}else{$('#hydrophobicity_charge_container').css('display','none');$('#hydrophobicity_charge_button').val('Show');$('#hydrophobicity_charge_explanation').html('');}}catch(err){txt='There was an error with the button controlling the visibility of the plot.\n';txt=txt+'The originating error is:\n' + err + '\n\n';alert(txt);}};function plot_according_to_selectors(){try{var plot_datasets = [[],[]];if($('#hydrophobicity_checkbox').prop('checked') == true){plot_datasets[0] = { color: 'rgba(100,149,237,1)',data: hydrophobicity_datapoints,label: 'Hydrophobicity',lines: { show: true, fill: true, fillColor: 'rgba(100,149,237,0.1)' },yaxis: 1};}if($('#charge_checkbox').prop('checked') == true){plot_datasets[1] = {color: 'rgba(255,99,71,1)',data: charge_datapoints,label: 'Charge',lines: { show: true, fill: true, fillColor: 'rgba(255,99,71,0.1)' },yaxis: 2};}for (plot_num = 0 ; plot_num < number_of_plots ; plot_num ++){$.plot('#hydrophobicity_charge_placeholder'+ plot_num.toString(), plot_datasets, flot_plot_options[plot_num] );}var screen_width = $('canvas.flot-base').width(); var pos_of_first_tick = 46;var pos_of_last_tick = screen_width - 51;var tick_diff = (screen_width - 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class=\'AutoAnnotator_sec_strand\' style=\'width:' + (((sec_strand_datapoints[j][1] - sec_strand_datapoints[j][0] + 1)*tick_diff).toFixed(0)).toString() + 'px; left:' + ((pos_of_first_tick + (sec_strand_datapoints[j][0] - 1.5)*tick_diff - Math.floor((sec_strand_datapoints[j][0] - 1)/200)*200*tick_diff).toFixed(0)).toString() + 'px\'></div>');}}if($('#acc_checkbox').prop('checked') == true){for ( j = 0 ; j < acc_buried_datapoints.length ; j++ ){$('#hydrophobicity_charge_placeholder' + Math.floor((acc_buried_datapoints[j][0] - 1)/200) ).append('<div class=\'AutoAnnotator_acc_buried\' style=\'width:' + (((acc_buried_datapoints[j][1] - acc_buried_datapoints[j][0] + 1)*tick_diff).toFixed(0)).toString() + 'px; left:' + ((pos_of_first_tick + (acc_buried_datapoints[j][0] - 1.5)*tick_diff - Math.floor((acc_buried_datapoints[j][0] - 1)/200)*200*tick_diff).toFixed(0)).toString() + 'px\'></div>');}for ( j = 0 ; j < acc_exposed_datapoints.length ; j++ ){$('#hydrophobicity_charge_placeholder' + 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 +
<h2> <b> Nanjing 2019 - Characterization </b> </h2>
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 +
<p>We adapted the part to be able to assemble our gene of interest (BBa_K3253003) with the cloning vector (BBa_K3253005) to test whether our gene of interest has already been successfully transferred to the Agrobacterium and our target plant. This florescent gene was expected to have its greatest excitement wavelength at 510nm, which is an indicator of the result of our transfer.
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Due the delay of the gene posting from the IGEM official for a month. The official promised that the gene would arrive at 10th August, but the actual Ghchi6 sequence arrived at China at 7th September. This is the main reason that we haven't finished our experiment on time. Please take this into consideration. We have shown our progress in our demonstration.
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<h2> <b> NYMU-Taipei 2019 - Characterization </b> </h2>
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 +
We were searching for fluorescent protein-coding genes to be used in our project. This BBa_E0040 iGEM part was listed in the well 13L of Plate 4 of the 2018 Spring iGEM Distribution Kit. The plasmid backbone listed was pSB1A2 (see https://parts.igem.org/partsdb/get_part.cgi?part=BBa_E0040). We had tried several times to do transformation with the provided plasmid DNA on E. coli DH5_alpha cells and grow the transformed cells on Ampicillin plates. However, no colonies had shown up on the Ampicillin plates. Because most iGEM teams submitted their parts on pSB1C3 backbone plasmid, we then tried to plate the transformed cells on Chloramphenicol plates to see if we could find any growth, To our surprise, we did see colonies grow on the top of our Chloramphenicol plates. We were able to purify plasmid DNA out of liquid cultures from these transformed colonies. Therefore, we would like to share our characterization of this BBa_E0040 part with other iGEM teams trying to use this part in their project.
 +
 +
<h2> <b> Hong_Kong_LFC_PC 2019 - Characterization </b> </h2>
 +
 +
We designed a uric-acid-sensitive uricase generator for treating the gout disease. Since we will use the fluorescence protein to track the gene expression of the device, we would like to check the effect of uric acid on the signal of GFP. Since uric acid can alter the pH value, it may interfere the folding of GFP and lower its fluorescence signal. We treat the extracted GFP with different concentration of uric acid, and found that uric acid has a very little effect on the fluorescence signal. This indicate that our system is possible to track the gene expression.
 +
 +
https://2019.igem.org/wiki/images/7/7a/T--Hong_Kong_LFC_PC--GFP2.jpg
 +
 +
<h2> <b> Fudan-TSI 2019 - Characterization </b> </h2>
 +
 +
2019 Team Fudan-TSI uses this part as a reporter protein to verify the ability of recovery mutation from EGFP mutants.
 +
 +
We focused our measurement on characterizing the fluorescence recovery of EGFP from its nonsense mutation in the following 4 ways:<br/><br/>
 +
1) Green fluorescence could be seen on the plate under UV light through naked eyes and recorded by a cellphone camera. Liquid culture could be placed in a culture dish and fluorescence is easily detectable under fluorescent microscopy.
 +
2) We designed PCR primers to only amplify the recovered EGFP sequence but not the mutated version. The amplified band could be easily visualized after electrophoresis.
 +
3) Fluorescence level was quantified through microplate reader according to fluorescein solutions and silicon beads, both standard samples are from the distributed measurement kit.
 +
4) We ran PAGE gel of IPTG induced bacterial lysates. The mutated version produced a truncated protein at 17.8 kD, while the recovered EGFP is 26.9 kD.<br/><br/>
 +
We used multiple methods to ensure that EGFP is truly recovered from its nonsense mutation.<br/><br/>
 +
 +
===Naked eye detection===
 +
''Escherichia coli'' (BL21) transformed with plasmid containing EGFP is coated on a petri dish and cultured for 12-14 h overnight. Then the dish lid is removed and placed on UV light. Green fluorescence is emitted from single-cell colonies and detectable through naked eyes (Fig. 1).
 +
[[File:EGFP PLATE.jpeg|center|400px|thumb|'''Figure 1. Cell colonies expressing green fluorescence can be detected by naked eyes under UV light.''' ]]
 +
 +
===Fluorescence microscope observation===
 +
Single colony of ''Escherichia coli'' (BL21) transformed with plasmid containing EGFP is picked and cultured in liquid medium (2*YT). After overnight 37 ℃ culture, we transferred the liquid into an empty petri dish, and observed its fluorescence under a fluorescence microscope. Green fluorescence can be detected at the place of the bacteria solution while the rest of the plate as we expected. (Fig. 2).
 +
[[File:EGFP Fluorescence Microscope.png|center|400px|thumb|'''Figure 2. Fluorescence can be detected under fluorescence microscopy.''' Green fluorescence can be detected from liquid culture under fluorescence microscopy (emission wavelength 488 nm). The line in the middle shows the boundary between culture and empty petri dish. ]]
 +
 +
===PCR Verification===
 +
We designed a set of primers which cannot amplify the nonsense mutants (BBa_K3257031 & BBa_K3257032) of EGFP but is able to amplify the recovered EGFP. After PCR reaction, electrophoresis is performed and the recovered EGFP band is visibly bright while the mutant band does not appear (Fig. 3).
 +
[[File:EGFP Mutants DNA.png|center|400px|thumb|'''Figure 3. EGFP can be amplified through PCR while its nonsense mutant could not.''' The primer is specifically designed at the site of mutation to only amplify the EGFP (sequence: CATGGCCGACAAGCAG). The expected product length should be 410 bp as the arrow shows, which correlates with the band. When the annealing temperature is set at 64 ℃, only the full-length EGFP can be amplified. Control is a nonrelevant plasmid.]]
 +
 +
===Fluorescence quantification through measurement kit===
 +
After being sure that the fluorescence recovered, we quantified its intensity with a microplate reader and the standard samples from distributed measurement kit. We followed the calibration protocol (https://www.protocols.io/view/calibration-protocol-plate-reader-fluorescence-cal-6zrhf56) from the measurement community.
 +
====Cell quantification====
 +
For OD<sub>600</sub> measurement, we use the silica beads in the 2019 iGEM measurement kit as a standard substance.
 +
As a preparation, we have measured a particle standard curve of the silica beads from maximum concentration to 0 (pure ddH2O) and used iGEM official data processing excel to generate the particle standard curve. Then, we determined the best-fitted linear region with the maximum correlation coefficient R2 (Fig. 4a). Before each time we measure our samples, we will first measure the OD600 of the silica beads samples whose concentration are at both ends of the best-fitted linear region, which in our case, is from 300,000,000/100 μl to 18,750,000/100 μl for calibration of the particle standard curve. After measuring the bacteria liquid culture samples, we will change the OD600 to the number of particles according to the calibrated standard curve.
 +
====Fluorescence quantification====
 +
For fluorescence quantification, we use the fluorescein salt provided in 2019 iGEM measurement kit as a standard substance.
 +
As a preparation, we have measured a fluorescence standard curve of the fluorescein salt from maximum concentration to 0 (pure PBS) and used iGEM official data processing excel to generate the fluorescence standard curve. Then, we determined the best-fitted linear region with maximum correlation coefficient R2 (Fig. 4b). Before each time we measure our samples, we will first measure the fluorescence intensity of the fluorescein salt samples whose concentration are at both ends of the best-fitted linear region, which in our case, is from 10 μM to 0.0390625 μM for calibration of the fluorescence standard curve. After measuring the bacteria liquid culture samples, we have changed the fluorescence intensity to the concentration of fluorescein salt according to the calibrated standard curve.
 +
====Normalization====
 +
Finally, we would divide the fluorescein salt concentration by the number of silica beads for our final quantified fluorescence intensity which is c[fluorescein salt]/n[silica beads] and has a unit of μM/(pcs/100 μl).
 +
 +
[[File:EGFP Mutants.png|center|400px|thumb|'''Figure 4. The relative fluorescence intensity of EGFP and its nonsense mutants''' EGFP represents the relative fluorescence intensity of BL21(DE3) transformed with plasmid encoding EGFP protein. EGFP_Q158X and EGFP_K159X represents the nonsense mutants of wild-type EGFP. According to the relative fluorescence intensity, we can see that EGFP nonsense mutants lose the ability of fluorescing.]]
 +
 +
===SDS-PAGE===
 +
The EGFP nonsense mutant can only express a truncated peptide of 17.8 kD, while the full-length EGFP protein is 26.9 kD, the difference between their molecular weight could be visualized through SDS-PAGE. (Fig. 5)
 +
[[File:EGFP SDS-PAGE.png|center|400px|thumb|'''Figure 5. EGFP and EGFP mutant are of different length on the PAGE gel.''' Full-length EGFP has a brighter band at 26.9 kDa, while its two mutants have brighter bands at 17.8 kDa. SDS-PAGE is performed on whole-cell lysis, which makes the band obscure.]]
 +
 +
 +
<h2> <b> SZTA_Szeged_HU - Characterization </b> </h2>
 +
 +
Educational purpose in secondary school learning:
 +
 +
During our experiment, we used this GFP to create two plasmids that were transformed into E. coli (K12). The two inserts for the plasmids contained a Microcystis aeruginosa NIES-843 promoter region. From this promoter transcription can occur in both 3' and 5' directions, thus in one construct we put the GFP at the 3' and in the other construct we put it at the 5' end of the promoter. With these constructs we can measure whether the transcription occurs in both directions. We measured the transformed bacteria’s fluorescence emission with Vernier SpectroVis Plus Spectrophotometer + Fluorometer. This is a widely used device among secondary schools because it is easy and simple to measure with, thus this is a great instrument for teaching purposes.
 +
 +
https://static.igem.org/mediawiki/parts/e/e8/T--SZTA_Szeged_HU--Contribution_1.png
 +
 +
It had an excitation point at 500nm, for this GFP it created an emission maximum at 490nm.
 +
We measure the emitted light's intensity at 490nm and 515nm, this value came from the literature.
 +
 +
https://static.igem.org/mediawiki/parts/8/8b/T--SZTA_Szeged_HU--Contribution2.png
 +
 +
The tables below represent the measured light intensity at 490nm and 515nm from the Microcystis cultures we cultivated on 24°C and 30°C. Every readout was multiplied by 1000.
 +
 +
https://static.igem.org/mediawiki/parts/e/ea/T--SZTA_Szeged_HU--Measurement1.png
 +
 +
https://static.igem.org/mediawiki/parts/9/9b/T--SZTA_Szeged_HU--Measurement2.png
 
<partinfo>E0040 SequenceAndFeatures</partinfo>
 
<partinfo>E0040 SequenceAndFeatures</partinfo>
 +
 +
=SUSTech_Shenzhen 2020 characterization=
 +
 +
Protein anti-CRISPR-associated 1 (Aca1) is expressed by T7 promoter, Aca1 will subsequently inhibit the anti-CRISPR promoter, so the gene expression downstream anti-CRISPR will be inhibited until Navitoclax (a compound that can inhibit Aca1 found by SUSTech_Shenzhen) is added artificially. Without the inhibition from Aca1, the expression of genes downstream anti-CRISPR promoter will increase significantly. Therefore, protein expression can be regulated artificially.
 +
 +
We characterised the efficiency of this part as a reporter in a protein regulation system, GFP was sufficiently expressed, which can directly reflect the efficiency of the regulation role of Navitoclax in our composite part [https://parts.igem.org/Part:BBa_K3423005 BBa_K3423005].
 +
 +
The green fluorescence intensity regulated by navitoclax in part BBa_K3423005 is measured with microplate reader:
 +
https://static.igem.org/mediawiki/parts/3/33/SUSTech_ShenzhenGFP.png
 +
 +
 +
===<h1>Improved by BNU-China 2020</h1>===
 +
We design a device for increasing the degradation rate of green fluorescent protein (GFP) in yeast by adding the first 124 amino acids of Clb2 at its N-terminal, therefore the green fluorescence will degrade sooner when expression ends. Please view [https://parts.igem.org/Part:BBa_K3506036 BBa_K3506036]for more details.
 +
 +
==Estonia_TUIT 2021 team contribution==
 +
===Green Fluorescent Protein (GFPmut3)===
 +
 +
GFPmut3 is a simple (constitutively fluorescent) green fluorescent protein produced from ''Aequorea victoria'' that was first published in 1996. It is a weak dimer that matures very quickly. The green fluorescent protein (GFP) is a protein that emits bright green fluorescence when exposed to light in blue to ultraviolet range (Figure 1). It was first obtained from the jellyfish Aequorea victoria, hence it is also known as avGFP. Additional organisms with GFPs have been discovered since, including corals, sea anemones, zoanthids, copepods, and lancelets.
 +
It was discovered that the absorbance and fluorescence of green fluorescent protein (GFP) mutants are strongly pH-dependent in aqueous solutions and the intracellular compartments. pH titrations of purified recombinant GFP mutants indicated >10-fold reversible changes in absorbance and fluorescence with pKa values of 6.0 (GFP-F64L/S65T) with apparent Hill coefficient of approximately 1.
 +
 +
<html>
 +
<center>
 +
<figure>
 +
                    <img style="width:100%;" src="https://2021.igem.org/wiki/images/8/82/T--Estonia_TUIT--Conribution_GFPmut3.svg"><br><br>
 +
                    <i><b>Figure 1. The emission and excitation spectra of GFPmut3b (GFPmut3b:: Fluorescent Protein Database).
 +
</b></i>The light green graph corresponds to GFPmut3 excitation spectra, and the neon green graph corresponds to GFPmut3 emission spectra. It can be seen that the excitation maximum for the GFPmut3 is at 500 nm, and the emission maximum is at 513 nm. The extinction coefficient was 89,400 M<sup>-1</sup>cm<sup>-1</sup>. The quantum yield was 0.39.
 +
                  </figure>
 +
</center>
 +
</html>
 +
 +
Confocal microscopy settings for GFPmut3 can be found in Table 1 ''(Imaging Fluorescent Proteins | Nikon’s MicroscopyU).''
 +
 +
'''''Table 1. Fluorescent Nikon microscope A1 HD25/A1R HD25 settings for GFP (wt).'''''
 +
 +
<html>
 +
 +
  <head>
 +
      <title>HTML Tables</title>
 +
  </head>
 +
 +
  <body>
 +
      <table border = "1">
 +
        <tr>
 +
            <td>Excitation Laser (nm)</td>
 +
            <td>Excitation Filter CWL / BW (nm)</td>
 +
            <td>Dichromatic Mirror Cut-On (nm)</td>
 +
            <td>Barrier Filter CWL / BW (nm)</td>
 +
            <td>Relative Brightness (% of EGFP)</td>
 +
        </tr>
 +
       
 +
        <tr>
 +
            <td>Argon (488)</td>
 +
            <td>450/50</td>
 +
            <td>480LP</td>
 +
            <td>510/50</td>
 +
            <td>48</td>
 +
     
 +
     
 +
      </table>
 +
     
 +
  </body>
 +
</html>
 +
 +
===References===
 +
*Imaging Fluorescent Proteins | Nikon’s MicroscopyU. (n.d.). Retrieved October 15, 2021, from https://www.microscopyu.com/techniques/fluorescence/fluorescent-protein-imaging-parameters
 +
 +
===<h1>Improved by Tianjin 2021</h1>===
 +
Ubiquitin is a small protein found in all eukaryotes whose primary function is to label a protein to be quickly recognized and degraded by the proteasome in the cell. We added a ubiquitin tag before the GFP structural gene, which would result in faster recognition and degradation of the expressed ubiquitin-tagged-GFP fusion protein by the ubiquitin degradation mechanism.Please view [https://parts.igem.org/Part:BBa_K3939111# BBa_K3939111]for more details.
 +
 +
==Improved by HS_China 2022 ==
 +
 +
We have added a new signal peptide to the N side of E0040. The new part is : <html><a href='https://parts.igem.org/Part:BBa_K4183005'>BBa_K4183005</a></html>(Group: iGEM2022 HS_China)
 +
 +
 +
==Improved by HS_Shanghai 2023 ==
 +
 +
We have added a new protein degradation tags to the C side of E0040. The new part is : <html><a href='https://parts.igem.org/Part:BBa_K4698007'>BBa_K4698007</a></html>

Latest revision as of 15:12, 11 October 2023

green fluorescent protein derived from jellyfish Aequeora victoria wild-type GFP (SwissProt: P42212

GFP (mut3b) [note that this part does not have a barcode]

Contribution of OUC-China 2022

Usage: Characterization of SSRE promoter in Aureobasidium melanogenum

We got GFP gene synthetized by a company after optimizing the codon of the part BBa_E0040.Then we cloned GFP gene into our electrocompetent plasmid. We co-transfected this plasmid with AtCRE1-electrocompetent plasmid. We selected 583bp specific fragment of AtCRE1 gene (Lane 1 ) and the whole length of PTP2+GFP (Lane 4) to test transformation. Then we amplifying the targeted gene of genome extracted respectively. Shown in figure1, we successfully introduced all our target sequence into Aureobasidium melanogenum.

Figure 1. Gel electrophoresis results of P16 genome amplifying AtCRE1 gene(Lane 1), transformed strain genome amplifying AtCRE1(Lane 2), P16 genome amplifying PTP2+GFP(Lane 3) and transformed strain genome amplifying PTP2+GFP(Lane 4)

In order to better characterize the SSRE promoter, we optimized the codon of the part BBa_E0040 and expressed it in Aureobasidium melanogenum, expanding the application chassis range of this part. The sequence optimized of the codon also can be a suitable part for the team committed to developing the potential of Aureobasidium melanogenum.

Figure2. Effect of different concentrations of IP on SSRE promoter induction(measured by the flourescence intensity of GFP)

Contribution of LZU-CHINA 2021

Usage: Construction of SARS-CoV-2 pseudovirus

We cloned GFP gene into a third generation lentiviral plasmid.We co-transfected this lentiviral plasmid, PAX2 and a plasmid carried SARS-CoV-2 spike protein gene into 293T cells. The spike protein of SARS-CoV-2 in cell and medium was detected by Western-blot. HEK293T cells were transfected for 40 h. RIPA lysis buffer was used to lyse cells. pMD2.G plasmid is used as control.
The samples were separated by SDS-PAGE and transferred to PVDF membrane for Western Blot detection. The membrane was incubated with primary antibody and secondary antibody. We observed the result after using ECL chemiluminescence reagent.

Figure 1 SARS-CoV-2 spike protein expression in cell and medium.

Then We added the medium containing pseudovirus to ACE2-293T stable cell line. After 48h, fluorescence microscope was used to observe the infection effect. As the result shows, pseudovirus is prepared successfully.

Figure 2 Infection effect of SARS-CoV-2 pseudovirus.


Jiangnan_China 2020 - Contribution

The green fluorescent protein (GFP) gene can be used as reporter gene and express in Starmerella bombocola. We want to use it to test the strength of promoters.
We built a device(BBa_K3402050) and transfer the expression cassette into Starmerella bombocola to observe the fluorescence intensity. This device consists of the promoter, the GFP gene(BBa_K3402000) and a terminator with the constructed vector. Besides, the hygromycin resistance gene was also constructed into the plasmid as the marker gene to determine if the transformation is successful.
The transformed yeast was coated on a plate containing hygromycin. After 48 hours of incubation, the existed transformants were performed fluorescence observation and transcriptome analysis. As a result, the expression of the GFP gene in Starmerella bombocola is completed. Finally, we can link different promoters to yeGFP to know the strength of promoters by testing different fluorescence intensity of different promoters.


a) Fluorescence intensity of different promoters. b) Transcription levels of different promoters. c) GFP was successfully expressed in cells

Usage and Biology: Characterization

Group: Valencia_UPV iGEM 2018
Author: Adrián Requena Gutiérrez, Carolina Ropero
Summary: We have adapted the part to be able to assemble transcriptional units with the Golden Gate method and we have done the characterization of this protein.
Documentation:
The characterization of this protein (and by extension of all the other part that codify for the GFP) was performed with our transcriptional unit BBa_K2656105. This transcriptional unit was assembled in a Golden Braid alpha1 plasmid including the following parts:

  • BBa_K2656004: the J23106 promoter in its Golden Braid compatible version from our [http://2018.igem.org/Team:Valencia_UPV/Part_Collection Part Collection]
  • BBa_K2656009: the B0030 ribosome biding site in its Golden Braid compatible version from our [http://2018.igem.org/Team:Valencia_UPV/Part_Collection Part Collection]
  • BBa_K2656022: This part.
  • BBa_K2656026: the B0015 transcriptional terminator in its Golden Braid compatible version from our [http://2018.igem.org/Team:Valencia_UPV/Part_Collection Part Collection]

In order to carry out a correct characterization of the protein and to be able to use it to make measurements of the different transcriptional units that we assembled with it, we have obtained the emission and excitation spectra in the conditions of our equipment. By using this [http://2018.igem.org/Team:Valencia_UPV/Experiments#spectra protocol] with the parameters of Table 1, Figure 1 was obtained.


Parameter Value
Number of samples 6
Excitation Wavelength measurement range (nm) [430-520]
Emission wavelenght (nm) 545
Emission Wavelength measurement range (nm) [490-580]
Excitation wavelenght (nm) 475
Gain (G) 70
Table 1. Parameters used to obtain the spectra


GFP spectra.
Figure 1. GFP emission and excitation spectra

SBS_NY 2019 - Characterization

We used GFP as a critical reporter gene in our heavy metal biosensor and built four plasmids with GFP expression driven by MerR-GFP like heavy metal inducible repressors: CadR-GFP BBa_K3194007 MerR-GFP BBa_K3194008 CueR-GFP BBa_K3194009 ZntR-GFP BBa_K3194010

T--SBS_NY--zntR-GFP.png

Under the relatively low concentration levels in our experiment, heavy metal cations didn't have an observable effect on GFP activity and signal strength.

Also, we designed a Low-Cost, all-solid-state GFP sensor and used its prototype measured the fluorescent output of BBa_E0040.

Usage and Biology

Untagged version of gfp from Repressilator reporter. See the design page for more source information.

The original citation for GFPmut3b is as follows:

Cormack, B.P., Valdivia, R.H., and S. Falkow. FACS-optimized mutants of green fluorescent protein (GFP). Gene 173: 33-38 (1996).

Here's the link: http://www.sciencedirect.com/science/article/pii/0378111995006850


Fluorescence wavelengths

Cormack et al.Cormack report the following excitation and emission data for GFPmut3 -

  • Excitation max - 501nm
  • Emission max - 511nm

Latency

Cormack et al.Cormack report detectable fluorescence within 8 mins. Please add maturation time data for E0040 here.

References

<biblio>

  1. Cormack pmid=10659856

</biblio>

Allergen characterization of BBa_E0040

The Baltimore Biocrew 2017 team discovered that proteins generated through biobrick parts can be evaluated for allergenicity. This information is important to the people using these parts in the lab, as well as when considering using the protein for mass production, or using in the environment. The allergenicity test permits a comparison between the sequences of the biobrick parts and the identified allergen proteins enlisted in a data base.The higher the similarity between the biobricks and the proteins, the more likely the biobrick is allergenic cross-reactive. In the full-length alignments by FASTA, 30% or more amount of similarity signifies that the biobrick has a Precaution Status meaning there is a potential risk with using the part. A 50% or more amount of identity signifies that the biobrick has a Possible Allergen Status. In the sliding window of 80 amino acid segments, greater than 35% signifies similarity to allergens. The percentage of similarity implies the potential of harm biobricks’ potential negative impact to exposed populations. For more information on how to assess your own biobrick part please see the “Allergenicity Testing Protocol” in the following page http://2017.igem.org/Team:Baltimore_Bio-Crew/Experiments

For the biobrick part, BBa_E0040, there was a 28.7% of identity match and 47.1% of similarity match compared to the top allergen in the database. This means that the biobrick part is NOT of potential allergen status. In the 80 amino acid alignments by FASTA, no matches found that are greater than 35% for this biobrick.


>Internal Priming Screening Characterization of BBa_E0040: Has no possible internal priming sites between this BioBrick part and the VF2 or the VR primer.

The 2018 Hawaii iGEM team evaluated the 40 most frequently used BioBricks and ran them through an internal priming screening process that we developed using the BLAST program tool. Out of the 40 BioBricks we evaluated, 10 of them showed possible internal priming of either the VF2 or VR primers and sometime even both. The data set has a range of sequence lengths from as small as 12 bases to as large as 1,210 bases. We experienced the issue of possible internal priming during the sequence verification process of our own BBa_K2574001 BioBrick and in the cloning process to express the part as a fusion protein. BBa_K2574001 is a composite part containing a VLP forming Gag protein sequence attached to a frequently used RFP part (BBa_E1010). We conducted a PCR amplification of the Gag-RFP insert using the VF2 and VR primers on the ligation product (pSB1C3 ligated to the Gag + RFP). This amplicon would serve as template for another PCR where we would add the NcoI and BamHI restriction enzyme sites through new primers for ligation into pET14b and subsequent induced expression. Despite gel confirming a rather large, approximately 2.1 kb insert band, our sequencing results with the VR primer and BamHI RFP reverse primer gave mixed results. Both should have displayed the end of the RFP, but the VR primer revealed the end of the Gag. Analysis of the VR primer on the Gag-RFP sequence revealed several sites where the VR primer could have annealed with ~9 - 12 bp of complementarity. Internal priming of forward and reverse primers can be detrimental to an iGEM project because you can never be sure if the desired construct was correctly inserted into the BioBrick plasmid without a successful sequence verification.


Part Characteristics in Cell-Free Chassis

Parameter Value and Description
Calibration A conversion factor of 79.429 from Au to concentraion in nM
Half-life 33 hours in the cell-free chassis, with a degradation constant of 0.0210 (in hours)

Purificaton

GFPmut3b can be purified for calibration after the addition of a his-tag. The detailed [http://2007.igem.org/Imperial/Wet_Lab/Protocols/Prot1.6 protocols]and [http://2007.igem.org/Imperial/Wet_Lab/Results/Res1.6 results]for the purification can be found.

Calibration

The fluorescence of purified GFPmut3B was calibrated in the cell-free chassis. The derived [http://2007.igem.org/Imperial/Wet_Lab/Results/Res1.3 calilbration curve]allows the determination of the concentration of GFPmut3b in the cell-free chassis. [http://2007.igem.org/Imperial/Wet_Lab/Protocols/Prot1.3 Detailed protocols]for generating the calibration curve are available. Other calibration curves for are also available on the results page.

Calibration curve of concentration of GFP against fluorescence. The conversion factor is 79.429.

Degradation

The degradation of GFPmut3B in the cell-free chassis was also characterized. Purified GFPmut3B was allowed to degrade in the cell-free chassis and the fluorescence was measured over time. [http://2007.igem.org/Imperial/Wet_Lab/Protocols/Prot1.4 Detailed protocols]and [http://2007.igem.org/Imperial/Wet_Lab/Results/Res1.4 results]are attached.

Degradation curve of different GFP concentrations.
Semi-log plot of GFP degradation at different GFP concentrations

From the semi-log plot, the degradation constant (in minutes) was derived to be 0.0003501, which is equivalent to GFPmut3b having a half-life of 33 hours in the cell-free chassis.

Expression of GFP-mut3b in cell lysate

Cell-free GFP-mut3b synthesis was analyzed in self-made E.Coli lysate from strain BL21(DE3). Fluorescence was measured at 37°C for five hours on a plate reader. For details on how the lysate and the energy solution were made and which components went into the final reaction volume of 10uL, check out our [http://2017.igem.org/Team:EPFL/Protocols protocols]. Shown are three repeats with a negative control as well as a shaded error graph (control was subtracted) summarizing the result. GFP-mut3b expression yields high signals in lysate and thus is a good choice of reporter while working on a cell-free chassis. Saturation occurs after about five hours.

Three repeats and control of GFP-mut3b expression in cell lysate.
Shaded error graph of GFP-mut3b expression in cell lysate (control was subtracted).


IIT Delhi 2017 - Characterization of Photobleaching

Photobleaching is the phenomenon of irreversible damage to the fluorophore, such that after certain number of electronic transitions on absorption of photons, it cannot fluoresce anymore. This hinders the ability to continuously image a sample over a long period of time, thus acting as a bottleneck to the characterization pipeline. Therefore, it is of paramount importance to understand and characterize the bleaching effect so that an optimum time gap between successive images could be chosen. This would ensure that the fluorophores do not bleach and at the same time we don’t have to compromise on the amount of collected data due to the time gap.

Here, we characterize the photobleaching effect in wildtype GFP (E0040) using fluorescent microscopy with the etaluma Lumascope 500 microscope. Cells expressing GFP under the PhlF repressible promoter (BBa_K2525016) in the absence of PhlF, so that it constitutively expressed GFP. Cells were loaded in microfluidic chambers and droplet encapsulation was performed to capture a small number of cells. This droplet was continuously exposed to light corresponding to the excitation wavelength of GFP (~485 nm) and the emission was captured continuously as well. The real time video for photobleaching in the cells encapsulated in the droplet is shown in GIF 1. ImageJ was used to analyze the images to obtain the rate of photobleaching as shown in Fig 1. Where we have fitted an exponential curve to the total intensity over time. It is known that photobleaching has a first order decay. We obtain a photobleaching rate of 0.002 per second (7.2 per hour).


GIF. 1 Real time video showing photobleaching in cells encapsulated in a droplet. To access the video in the GIF you'll have to visit the GIF at its link on the wiki; for that, click twice over the image in succession.


Fig. 1 Total Intensity in the encapsulated droplet over time. Since photobleaching is known to be a first order process, we have fitted an exponential curve to the data. The high R-squared value implies a good fit of the exponential model to the data. The rate of photobleaching turns out to be 0.002 per second (7.2 per hour).


































































Amazonas_Brazil team - Caracterization in E. coli Nissle 1917

Characterization

Escherichia coli Nissle 1917 (EcN) is widely used as a probiotic since it’s discovery in the second half of the 19th century by Alfred Nissle1 and although many iGEM teams had worked with this bacteria, we couldn’t find any specific characterization about the manipulation of EcN. To improve the quality of our work and provide data for other teams or researchers that might want to work with this bacteria in their laboratory, we characterized EcN growth curve and it’s behavior when transformed by electroporation with the iGEM vector pSB1C3 with GFP and RFP.
E. coli Nissle 1917 strains were grown overnight in Lysogeny Broth (LB) containing ampicilin (100 µg/mL) at 37°C and 200 rpm. Cultures were diluted in fresh LB until achieve 0,1 OD with the corresponding antibiotic and transferred to a 96-well plate (50 µL/well). Samples were always made in triplicates and a blank of LB. During 8h the absorbance at OD600 and fluorescence (excitation 504 nm and emission 515 nm) were measured with intervals of 1 hour.

Fig. 1. Fluorescence values of E. coli Nissle 1917 curve(w/v)

Kyoto 2018 - Characterization

We tested nonspecifically interaction of GFP(E0040) by immunoprecipitation for characterization. The figure shows the result of immunoprecipitation by GFPnanobody.(link) Without GFP’s band, we can see same bands pattern in lane 2 and 6. This result shows GFP has no nonspecifically interaction with proteins of S.cerevisiae under physiological salt concentration. So, there is no problem when we identify the location of localized proteins that fused with this GFP. Otherwise, in lane 8, there is a unique band.(④) This band might shows GFP’s nonspecifically interaction under high salt concentrations. So, when we use this part, we have to experiment under physiological salt concentration.

T--Kyoto--GFP IP.png

Secondly,TDH3 promoter and CYC1 terminator were added to both ends of ORF and cloned into pRS316 which is a shuttle vector of S. cerevisiae and E. coli. The resulting plasmid was transformed into wild-type yeast strain BY 4741 to overexpress GFP in yeast. Photographs of pellets recovered from the culture medium of yeast cells is below.As can be easily seen, the yeast pellet overexpressing GFP was colored in a pale yellow color.From this, it was confirmed that GFP of BBa_E0040 can be expressed in large amounts in yeast cells without changing the codon and that the expression level thereof is so large as to be visually observed under visible light without breaking the yeast.
T--Kyoto--Yeast GFPRFP.jpeg

Improvements

Chlamydomonas reinhardtii chloroplast optimised: BBa_K2148009
• Yeast- and FACS optimized GFP: BBa_K194001
• Yeast- and FACS optimized, fast degradable GFP: BBa_K194002
• RFC[1000] compatible GFP: BBa_K2294444

Improved by BNU-China 2019

We design a device for increasing the degradation rate of green fluorescent protein (GFP) by adding a 16-amino-acid-long tag replication protein A (RepA) at the N-terminal, therefore the green fluorescence will degrade sooner when expression ends. Please view BBa_K3036006 for more details


Protein data table for BioBrick BBa_E0040 automatically created by the BioBrick-AutoAnnotator version 1.0
Nucleotide sequence in RFC 10: (underlined part encodes the protein)
 ATGCGTAAA ... CTATACAAATAATAA
 ORF from nucleotide position 1 to 714 (excluding stop-codon)
Amino acid sequence: (RFC 25 scars in shown in bold, other sequence features underlined; both given below)

101 
201 
MRKGEELFTGVVPILVELDGDVNGHKFSVSGEGEGDATYGKLTLKFICTTGKLPVPWPTLVTTFGYGVQCFARYPDHMKQHDFFKSAMPEGYVQERTIFF
KDDGNYKTRAEVKFEGDTLVNRIELKGIDFKEDGNILGHKLEYNYNSHNVYIMADKQKNGIKVNFKIRHNIEDGSVQLADHYQQNTPIGDGPVLLPDNHY
LSTQSALSKDPNEKRDHMVLLEFVTAAGITHGMDELYK*
Sequence features: (with their position in the amino acid sequence, see the list of supported features)
None of the supported features appeared in the sequence
Amino acid composition:
Ala (A)9 (3.8%)
Arg (R)7 (2.9%)
Asn (N)13 (5.5%)
Asp (D)18 (7.6%)
Cys (C)2 (0.8%)
Gln (Q)8 (3.4%)
Glu (E)16 (6.7%)
Gly (G)23 (9.7%)
His (H)10 (4.2%)
Ile (I)12 (5.0%)
Leu (L)19 (8.0%)
Lys (K)20 (8.4%)
Met (M)6 (2.5%)
Phe (F)13 (5.5%)
Pro (P)10 (4.2%)
Ser (S)8 (3.4%)
Thr (T)15 (6.3%)
Trp (W)1 (0.4%)
Tyr (Y)11 (4.6%)
Val (V)17 (7.1%)
Amino acid counting
Total number:238
Positively charged (Arg+Lys):27 (11.3%)
Negatively charged (Asp+Glu):34 (14.3%)
Aromatic (Phe+His+Try+Tyr):35 (14.7%)
Biochemical parameters
Atomic composition:C1207H1853N321O362S8
Molecular mass [Da]:26909.4
Theoretical pI:5.80
Extinction coefficient at 280 nm [M-1 cm-1]:21890 / 22015 (all Cys red/ox)
Plot for hydrophobicity, charge, predicted secondary structure, solvent accessability, transmembrane helices and disulfid bridges 
Codon usage
Organism:E. coliB. subtilisS. cerevisiaeA. thalianaP. patensMammals
Codon quality (CAI):good (0.72)good (0.76)good (0.75)excellent (0.82)good (0.77)good (0.68)
Alignments (obtained from PredictProtein.org)
SwissProt:P42212 (98% identity on 238 AAs), Q9U6Y3 (25% identity on 217 AAs)
TrEML:B6UPG7 (99% identity on 238 AAs), B9U1C3 (98% identity on 238 AAs), J8VIQ3 (98% identity on 238 AAs), Q71RY9 (98% identity on 238 AAs), Q8GHE2 (98% identity on 238 AAs)
PDB:1gfl (98% identity on 229 AAs), 3vht (98% identity on 228 AAs)
Predictions (obtained from PredictProtein.org)
Subcellular Localization (reliability in brackets)
Archaea:secreted (99%)
Bacteria:cytosol (62%)
Eukarya:cytosol (36%)
Gene Ontology (reliability in brackets)
Molecular Function Ontology: -
Biological Process Ontology:GO:0018298 (45%), GO:0008218 (32%)
 
Predicted features:
Disulfid bridges: -
Transmembrane helices: -
The BioBrick-AutoAnnotator was created by TU-Munich 2013 iGEM team. For more information please see the documentation.
If you have any questions, comments or suggestions, please leave us a comment.

Nanjing 2019 - Characterization

We adapted the part to be able to assemble our gene of interest (BBa_K3253003) with the cloning vector (BBa_K3253005) to test whether our gene of interest has already been successfully transferred to the Agrobacterium and our target plant. This florescent gene was expected to have its greatest excitement wavelength at 510nm, which is an indicator of the result of our transfer. Due the delay of the gene posting from the IGEM official for a month. The official promised that the gene would arrive at 10th August, but the actual Ghchi6 sequence arrived at China at 7th September. This is the main reason that we haven't finished our experiment on time. Please take this into consideration. We have shown our progress in our demonstration.

NYMU-Taipei 2019 - Characterization

We were searching for fluorescent protein-coding genes to be used in our project. This BBa_E0040 iGEM part was listed in the well 13L of Plate 4 of the 2018 Spring iGEM Distribution Kit. The plasmid backbone listed was pSB1A2 (see https://parts.igem.org/partsdb/get_part.cgi?part=BBa_E0040). We had tried several times to do transformation with the provided plasmid DNA on E. coli DH5_alpha cells and grow the transformed cells on Ampicillin plates. However, no colonies had shown up on the Ampicillin plates. Because most iGEM teams submitted their parts on pSB1C3 backbone plasmid, we then tried to plate the transformed cells on Chloramphenicol plates to see if we could find any growth, To our surprise, we did see colonies grow on the top of our Chloramphenicol plates. We were able to purify plasmid DNA out of liquid cultures from these transformed colonies. Therefore, we would like to share our characterization of this BBa_E0040 part with other iGEM teams trying to use this part in their project.

Hong_Kong_LFC_PC 2019 - Characterization

We designed a uric-acid-sensitive uricase generator for treating the gout disease. Since we will use the fluorescence protein to track the gene expression of the device, we would like to check the effect of uric acid on the signal of GFP. Since uric acid can alter the pH value, it may interfere the folding of GFP and lower its fluorescence signal. We treat the extracted GFP with different concentration of uric acid, and found that uric acid has a very little effect on the fluorescence signal. This indicate that our system is possible to track the gene expression.

T--Hong_Kong_LFC_PC--GFP2.jpg

Fudan-TSI 2019 - Characterization

2019 Team Fudan-TSI uses this part as a reporter protein to verify the ability of recovery mutation from EGFP mutants.

We focused our measurement on characterizing the fluorescence recovery of EGFP from its nonsense mutation in the following 4 ways:

1) Green fluorescence could be seen on the plate under UV light through naked eyes and recorded by a cellphone camera. Liquid culture could be placed in a culture dish and fluorescence is easily detectable under fluorescent microscopy. 2) We designed PCR primers to only amplify the recovered EGFP sequence but not the mutated version. The amplified band could be easily visualized after electrophoresis. 3) Fluorescence level was quantified through microplate reader according to fluorescein solutions and silicon beads, both standard samples are from the distributed measurement kit. 4) We ran PAGE gel of IPTG induced bacterial lysates. The mutated version produced a truncated protein at 17.8 kD, while the recovered EGFP is 26.9 kD.

We used multiple methods to ensure that EGFP is truly recovered from its nonsense mutation.

Naked eye detection

Escherichia coli (BL21) transformed with plasmid containing EGFP is coated on a petri dish and cultured for 12-14 h overnight. Then the dish lid is removed and placed on UV light. Green fluorescence is emitted from single-cell colonies and detectable through naked eyes (Fig. 1).

Figure 1. Cell colonies expressing green fluorescence can be detected by naked eyes under UV light.

Fluorescence microscope observation

Single colony of Escherichia coli (BL21) transformed with plasmid containing EGFP is picked and cultured in liquid medium (2*YT). After overnight 37 ℃ culture, we transferred the liquid into an empty petri dish, and observed its fluorescence under a fluorescence microscope. Green fluorescence can be detected at the place of the bacteria solution while the rest of the plate as we expected. (Fig. 2).

Figure 2. Fluorescence can be detected under fluorescence microscopy. Green fluorescence can be detected from liquid culture under fluorescence microscopy (emission wavelength 488 nm). The line in the middle shows the boundary between culture and empty petri dish.

PCR Verification

We designed a set of primers which cannot amplify the nonsense mutants (BBa_K3257031 & BBa_K3257032) of EGFP but is able to amplify the recovered EGFP. After PCR reaction, electrophoresis is performed and the recovered EGFP band is visibly bright while the mutant band does not appear (Fig. 3).

Figure 3. EGFP can be amplified through PCR while its nonsense mutant could not. The primer is specifically designed at the site of mutation to only amplify the EGFP (sequence: CATGGCCGACAAGCAG). The expected product length should be 410 bp as the arrow shows, which correlates with the band. When the annealing temperature is set at 64 ℃, only the full-length EGFP can be amplified. Control is a nonrelevant plasmid.

Fluorescence quantification through measurement kit

After being sure that the fluorescence recovered, we quantified its intensity with a microplate reader and the standard samples from distributed measurement kit. We followed the calibration protocol (https://www.protocols.io/view/calibration-protocol-plate-reader-fluorescence-cal-6zrhf56) from the measurement community.

Cell quantification

For OD600 measurement, we use the silica beads in the 2019 iGEM measurement kit as a standard substance. As a preparation, we have measured a particle standard curve of the silica beads from maximum concentration to 0 (pure ddH2O) and used iGEM official data processing excel to generate the particle standard curve. Then, we determined the best-fitted linear region with the maximum correlation coefficient R2 (Fig. 4a). Before each time we measure our samples, we will first measure the OD600 of the silica beads samples whose concentration are at both ends of the best-fitted linear region, which in our case, is from 300,000,000/100 μl to 18,750,000/100 μl for calibration of the particle standard curve. After measuring the bacteria liquid culture samples, we will change the OD600 to the number of particles according to the calibrated standard curve.

Fluorescence quantification

For fluorescence quantification, we use the fluorescein salt provided in 2019 iGEM measurement kit as a standard substance. As a preparation, we have measured a fluorescence standard curve of the fluorescein salt from maximum concentration to 0 (pure PBS) and used iGEM official data processing excel to generate the fluorescence standard curve. Then, we determined the best-fitted linear region with maximum correlation coefficient R2 (Fig. 4b). Before each time we measure our samples, we will first measure the fluorescence intensity of the fluorescein salt samples whose concentration are at both ends of the best-fitted linear region, which in our case, is from 10 μM to 0.0390625 μM for calibration of the fluorescence standard curve. After measuring the bacteria liquid culture samples, we have changed the fluorescence intensity to the concentration of fluorescein salt according to the calibrated standard curve.

Normalization

Finally, we would divide the fluorescein salt concentration by the number of silica beads for our final quantified fluorescence intensity which is c[fluorescein salt]/n[silica beads] and has a unit of μM/(pcs/100 μl).

Figure 4. The relative fluorescence intensity of EGFP and its nonsense mutants EGFP represents the relative fluorescence intensity of BL21(DE3) transformed with plasmid encoding EGFP protein. EGFP_Q158X and EGFP_K159X represents the nonsense mutants of wild-type EGFP. According to the relative fluorescence intensity, we can see that EGFP nonsense mutants lose the ability of fluorescing.

SDS-PAGE

The EGFP nonsense mutant can only express a truncated peptide of 17.8 kD, while the full-length EGFP protein is 26.9 kD, the difference between their molecular weight could be visualized through SDS-PAGE. (Fig. 5)

Figure 5. EGFP and EGFP mutant are of different length on the PAGE gel. Full-length EGFP has a brighter band at 26.9 kDa, while its two mutants have brighter bands at 17.8 kDa. SDS-PAGE is performed on whole-cell lysis, which makes the band obscure.


SZTA_Szeged_HU - Characterization

Educational purpose in secondary school learning:

During our experiment, we used this GFP to create two plasmids that were transformed into E. coli (K12). The two inserts for the plasmids contained a Microcystis aeruginosa NIES-843 promoter region. From this promoter transcription can occur in both 3' and 5' directions, thus in one construct we put the GFP at the 3' and in the other construct we put it at the 5' end of the promoter. With these constructs we can measure whether the transcription occurs in both directions. We measured the transformed bacteria’s fluorescence emission with Vernier SpectroVis Plus Spectrophotometer + Fluorometer. This is a widely used device among secondary schools because it is easy and simple to measure with, thus this is a great instrument for teaching purposes.

T--SZTA_Szeged_HU--Contribution_1.png

It had an excitation point at 500nm, for this GFP it created an emission maximum at 490nm. We measure the emitted light's intensity at 490nm and 515nm, this value came from the literature.

T--SZTA_Szeged_HU--Contribution2.png

The tables below represent the measured light intensity at 490nm and 515nm from the Microcystis cultures we cultivated on 24°C and 30°C. Every readout was multiplied by 1000.

T--SZTA_Szeged_HU--Measurement1.png

T--SZTA_Szeged_HU--Measurement2.png


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    COMPATIBLE WITH RFC[25]
  • 1000
    INCOMPATIBLE WITH RFC[1000]
    Illegal BsaI.rc site found at 644

SUSTech_Shenzhen 2020 characterization

Protein anti-CRISPR-associated 1 (Aca1) is expressed by T7 promoter, Aca1 will subsequently inhibit the anti-CRISPR promoter, so the gene expression downstream anti-CRISPR will be inhibited until Navitoclax (a compound that can inhibit Aca1 found by SUSTech_Shenzhen) is added artificially. Without the inhibition from Aca1, the expression of genes downstream anti-CRISPR promoter will increase significantly. Therefore, protein expression can be regulated artificially.

We characterised the efficiency of this part as a reporter in a protein regulation system, GFP was sufficiently expressed, which can directly reflect the efficiency of the regulation role of Navitoclax in our composite part BBa_K3423005.

The green fluorescence intensity regulated by navitoclax in part BBa_K3423005 is measured with microplate reader: SUSTech_ShenzhenGFP.png


Improved by BNU-China 2020

We design a device for increasing the degradation rate of green fluorescent protein (GFP) in yeast by adding the first 124 amino acids of Clb2 at its N-terminal, therefore the green fluorescence will degrade sooner when expression ends. Please view BBa_K3506036for more details.

Estonia_TUIT 2021 team contribution

Green Fluorescent Protein (GFPmut3)

GFPmut3 is a simple (constitutively fluorescent) green fluorescent protein produced from Aequorea victoria that was first published in 1996. It is a weak dimer that matures very quickly. The green fluorescent protein (GFP) is a protein that emits bright green fluorescence when exposed to light in blue to ultraviolet range (Figure 1). It was first obtained from the jellyfish Aequorea victoria, hence it is also known as avGFP. Additional organisms with GFPs have been discovered since, including corals, sea anemones, zoanthids, copepods, and lancelets. It was discovered that the absorbance and fluorescence of green fluorescent protein (GFP) mutants are strongly pH-dependent in aqueous solutions and the intracellular compartments. pH titrations of purified recombinant GFP mutants indicated >10-fold reversible changes in absorbance and fluorescence with pKa values of 6.0 (GFP-F64L/S65T) with apparent Hill coefficient of approximately 1.



Figure 1. The emission and excitation spectra of GFPmut3b (GFPmut3b:: Fluorescent Protein Database). The light green graph corresponds to GFPmut3 excitation spectra, and the neon green graph corresponds to GFPmut3 emission spectra. It can be seen that the excitation maximum for the GFPmut3 is at 500 nm, and the emission maximum is at 513 nm. The extinction coefficient was 89,400 M-1cm-1. The quantum yield was 0.39.

Confocal microscopy settings for GFPmut3 can be found in Table 1 (Imaging Fluorescent Proteins | Nikon’s MicroscopyU).

Table 1. Fluorescent Nikon microscope A1 HD25/A1R HD25 settings for GFP (wt).

HTML Tables

Excitation Laser (nm) Excitation Filter CWL / BW (nm) Dichromatic Mirror Cut-On (nm) Barrier Filter CWL / BW (nm) Relative Brightness (% of EGFP)
Argon (488) 450/50 480LP 510/50 48

References

Improved by Tianjin 2021

Ubiquitin is a small protein found in all eukaryotes whose primary function is to label a protein to be quickly recognized and degraded by the proteasome in the cell. We added a ubiquitin tag before the GFP structural gene, which would result in faster recognition and degradation of the expressed ubiquitin-tagged-GFP fusion protein by the ubiquitin degradation mechanism.Please view BBa_K3939111for more details.

Improved by HS_China 2022

We have added a new signal peptide to the N side of E0040. The new part is : BBa_K4183005(Group: iGEM2022 HS_China)


Improved by HS_Shanghai 2023

We have added a new protein degradation tags to the C side of E0040. The new part is : BBa_K4698007