Difference between revisions of "Part:BBa E0040"

(Usage and Biology)
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__NOTOC__
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<partinfo>BBa_E0040 short</partinfo>
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GFP (mut3b) [note that this part does not have a barcode]
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===Usage and Biology===
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Un[[Help:Tag|tag]]ged version of gfp from Repressilator reporter. See the [[Part:BBa_E0040:Design | design page]] for more source information.
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The original citation for GFPmut3b is as follows:
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Cormack, B.P., Valdivia, R.H., and S. Falkow. FACS-optimized mutants of green fluorescent protein (GFP). Gene 173: 33-38 (1996).
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Here's the link: http://www.sciencedirect.com/science/article/pii/0378111995006850
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<!--
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<span class='h3bb'>Sequence and Features</span>
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<partinfo>BBa_E0040 SequenceAndFeatures</partinfo>
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<!-- -->
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<!--
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===Functional Parameters===
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<partinfo>BBa_E0040 parameters</partinfo>
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<!-- -->
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====Fluorescence wavelengths====
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Cormack ''et al''.<cite>Cormack</cite> report the following excitation and emission data for GFPmut3 - <br>
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*'''Excitation max''' - 501nm
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*'''Emission max''' - 511nm
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====Latency====
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Cormack ''et al''.<cite>Cormack</cite> report detectable fluorescence within 8 mins.
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''Please add maturation time data for E0040 here.''
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====References====
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<biblio>
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#Cormack pmid=10659856
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</biblio>
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===Part Characteristics in [[Chassis/Cell-Free_Systems|Cell-Free Chassis]]===
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{|border=1 width="90%" align="center"
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|-
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!width="20%" style="background:#CCCCFF"|Parameter
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!width="80%"|Value and Description
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|-align="center"
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|style="background:#EEEEFF"|Calibration
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|A conversion factor of 79.429 from Au to concentraion in nM
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|-align="center"
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|style="background:#EEEEFF"|Half-life
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|33 hours in the cell-free chassis, with a degradation constant of 0.0210 (in hours)
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|}
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====Purificaton====
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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.
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====Calibration====
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The fluorescence of purified GFPmut3B was calibrated in the [[Chassis/Cell-Free_Systems|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.
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[[Image:E0040_invitro_calibration.png|thumb|center|500px|Calibration curve of concentration of GFP against fluorescence. The conversion factor is 79.429.]]
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====Degradation====
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The degradation of GFPmut3B in the [[Chassis/Cell-Free_Systems|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.
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[[Image:E0040 invitro degradation.png|thumb|left|500px|Degradation curve of different GFP concentrations.]]
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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">
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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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====Improvements====
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Yeast- and FACS optimized GFP: <html><a href="https://parts.igem.org/Part:BBa_K194001" target="_blank">BBa_K194001</a>
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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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Revision as of 13:13, 6 May 2013

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