Difference between revisions of "Part:BBa K2066059"

Revision as of 01:28, 2 November 2017

Promoter Characterization: J23100, without RiboJ

This part is part of a library of parts designed to characterize the influence of RiboJ on the absolute gene expression level on various promoters, including the entire Anderson Promoter Library.

The part follows the UNS standard developed by William and Mary iGEM 2016, in which the insert is flanked by UNS 2 (BBa_K2066018) and UNS 3 (BBa_K2066019) for ease of cloning via Gibson or Golden Gate Assembly.

William and Mary iGEM 2017 used this part to facilitate easy measurement of the strength of protein degradation tag (pdt) A by measuring time to steady-state fluorescence values of sfGFP under the control of the strong constitutive promoter BBa_J23100. W&M iGEM 2017 used pdts as a method to control gene expression speed. This part was utilized to characterize the degradation properties of pdt A and confirm the fact that different pdts have different degradation strengths. See [http://2017.igem.org/Team:William_and_Mary/Results William and Mary's 2017 project] for more details. This part is one of a series of sfGFP reporter pdt parts. Series range is from BBa_K2333407 to BBa_K2333412.

Usage and Biology

Protein degradation tag A (BBa_K2333001) the strongest of the 6 protein degradation tags that William and Mary 2017 characterized, and is associated with the E. Coli orthogonal protease mf-Lon (BBa_K2333011). Therefore this part has the greatest degradation rate of the 6 protein degradation tags and it is the fastest to reach the steady-state fluorescence value. This part contains J23100 constitutive promoter, BBa_B0034 (RBS),pdt A, a double stop codon and BBa_B0015 (double terminator) in the William and Mary iGEM Universal Nucleotide Sequences (UNS) format. See Torella, et. al (2013). In order to demonstrate that protein degradation tags operated similarily regardless of the tagged protein, sfGFP reporters that were analogous to the mScarlet-I parts (BBa_K2333413 to BBa_K2333419) were built and characterized. This demonstrates that the protein degradation tags are modular and that they have differential strengths even when they are tagged on different proteins.

Characterization

W&M 2017 preliminarily characterized this Pdt A tagged BBa_J23100 sfGFP construct along with IPTG-inducible mf-Lon protease to show degradation rate and speed change effect measurements. The graph below shows this degradation characterization along with the data from the other tags in this series (BBa_K2333407-BBa_K2333412). While degradation is occurring, it does not necessarily line up with all of the expected tag strengths. This could be due to constraints surrounding plate reader measurements or inconsistencies with the sfGFP reporter itself.

Sequence and Features

Assembly Compatibility:

10
COMPATIBLE WITH RFC[10]
12
INCOMPATIBLE WITH RFC[12]
Illegal NheI site found at 47
Illegal NheI site found at 70
21
COMPATIBLE WITH RFC[21]
23
COMPATIBLE WITH RFC[23]
25
COMPATIBLE WITH RFC[25]
1000
INCOMPATIBLE WITH RFC[1000]
Illegal SapI.rc site found at 106

@@ Line 7: / Line 7: @@
 The part follows the UNS standard developed by William and Mary iGEM 2016, in which the insert is flanked by UNS 2 (BBa_K2066018) and UNS 3 (BBa_K2066019) for ease of cloning via Gibson or Golden Gate Assembly.
-<!-- Add more about the biology of this part here
+William and Mary iGEM 2017 used this part to facilitate easy measurement of the strength of protein degradation tag (pdt) A by measuring time to steady-state fluorescence values of sfGFP under the control of the strong constitutive promoter <partinfo>Bba_J23100</partinfo>. W&M iGEM 2017 used pdts as a method to control gene expression speed. This part was utilized to characterize the degradation properties of pdt A and confirm the fact that different pdts have different degradation strengths. See [http://2017.igem.org/Team:William_and_Mary/Results William and Mary's 2017 project] for more details.
+This part is one of a series of sfGFP reporter pdt parts. Series range is from <partinfo>BBa_K2333407</partinfo> to <partinfo>Bba_K2333412</partinfo>.
 ===Usage and Biology===
+Protein degradation tag A (<partinfo>BBa_K2333001</partinfo>) the strongest of the 6 protein degradation tags that William and Mary 2017 characterized, and is associated with the E. Coli orthogonal protease mf-Lon (<partinfo>Bba_K2333011</partinfo>). Therefore this part has the greatest degradation rate of the 6 protein degradation tags and it is the fastest to reach the steady-state fluorescence value. This part contains J23100 constitutive promoter, <partinfo>Bba_B0034</partinfo> (RBS),pdt A, a double stop codon and <partinfo>Bba_B0015</partinfo> (double terminator) in the William and Mary iGEM Universal Nucleotide Sequences (UNS) format. See Torella, et. al (2013). In order to demonstrate that protein degradation tags operated similarily regardless of the tagged protein, sfGFP reporters that were analogous to the mScarlet-I parts (<partinfo>Bba_K2333413</partinfo> to <partinfo>Bba_K2333419</partinfo>) were built and characterized. This demonstrates that the protein degradation tags are modular and that they have differential strengths even when they are tagged on different proteins.
+===Characterization===
+W&M 2017 preliminarily characterized this Pdt A tagged <partinfo>Bba_J23100</partinfo> sfGFP construct along with IPTG-inducible mf-Lon protease to show degradation rate and speed change effect measurements. The graph below shows this degradation characterization along with the data from the other tags in this series (<partinfo>K2333407</partinfo>-<partinfo>K2333412</partinfo>). While degradation is occurring, it does not necessarily line up with all of the expected tag strengths. This could be due to constraints surrounding plate reader measurements or inconsistencies with the sfGFP reporter itself.
+<html><img src="https://static.igem.org/mediawiki/parts/b/b9/T--William_and_Mary--J23100_sfGFP_deg_rate.png" width="520px"/></html>
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