Difference between revisions of "Part:BBa K2507016"

(→‎Usage and Biology)
(→‎Characterization)
 
(2 intermediate revisions by the same user not shown)
Line 14: Line 14:
  
 
<span class='h3bb'>Sequence and Features</span>
 
<span class='h3bb'>Sequence and Features</span>
−
<partinfo>BBa_K2507014 SequenceAndFeatures</partinfo>
+
<partinfo>BBa_K2507016 SequenceAndFeatures</partinfo>
  
 
==Characterization==
 
==Characterization==
−
After validate this system in laboratory <i>Escherichia coli</i> Top10 and <i>E.coli</i> Nissle 1917, this system can function as a tetrathionate sensor and reporter.
+
We first validated that this system can function as a tetrathionate sensor and reporter in the laboratory strains <i>Escherichia coli</i> Top10 and <i>E. coli</i> Nissle 1917.
−
[[File: SHSBNU 17 40a13.jpg|200px|thumb|left|alt text]]
+
[[File: SHSBNU 17 40a13.jpg|600px|thumb|center|Figure1]]
−
Figure 1. Schematic of ligand-induced signaling through TtrS/R and plasmid design of the sensor components. TtrS/R were tested under the situation BBa_K2507006 was in pSB4K5 backbone and BBa_K2507016 was in pSB1C3 backbone. We submitted the parts all to the iGEM registry in pSB1C3.
+
Figure 1. Schematic diagram of ligand-induced signaling through TtrS/R and plasmid-borne implementation of the sensor components. TtrS/R was tested with BBa_K2507006 integrated into the pSB4K5 backbone and BBa_K2507016 into the pSB1C3 backbone. We submitted all parts to the iGEM registry in pSB1C3.
  
 
==Reference==
 
==Reference==

Latest revision as of 13:39, 1 November 2017


J23109-ttrR-PttrB185-BBa_K592009

Usage and Biology

E. coli-codon-optimized TtrS(BBa_K2507002) and TtrR (BBa_K2507003) are two basic parts which are derived from the two-component system of the marine bacterium Shewanella baltica. TtrS is the membrane-bound sensor kinase (SK) which can sense tetrathionate outside the cell, and TtrR is the DNA-binding response regulator (RR). PttrB185-269 (BBa_K2507019) is a minimal TtrR-activated promoter which is activated when TtrR is phosphorylated by TtrS after TtrS senses tetrathionate.

Winter et al. have shown that reactive oxygen species (ROS) produced by the host during inflammation convert thiosulfate into tetrathionate, which this pathogen consumes to establish a beachhead for infection (Winter et al, 2010). Thus, tetrathionate may correlate with pro-inflammatory conditions and can therefore be used as a sensor for intestinal inflammation.

Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    INCOMPATIBLE WITH RFC[12]
    Illegal NheI site found at 11
    Illegal NheI site found at 34
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal AgeI site found at 318
  • 1000
    COMPATIBLE WITH RFC[1000]

Characterization

We first validated that this system can function as a tetrathionate sensor and reporter in the laboratory strains Escherichia coli Top10 and E. coli Nissle 1917.

Figure1

Figure 1. Schematic diagram of ligand-induced signaling through TtrS/R and plasmid-borne implementation of the sensor components. TtrS/R was tested with BBa_K2507006 integrated into the pSB4K5 backbone and BBa_K2507016 into the pSB1C3 backbone. We submitted all parts to the iGEM registry in pSB1C3.

Reference

Daeffler, K. N., Galley, J. D., Sheth, R. U., Ortiz‐Velez, L. C., Bibb, C. O., & Shroyer, N. F., et al. (2017). Engineering bacterial thiosulfate and tetrathionate sensors for detecting gut inflammation. Molecular Systems Biology, 13(4), 923.