Difference between revisions of "Part:BBa K4294808"

Revision as of 15:02, 12 October 2022

TU constitutive LuxR for OL

Usage and Biology

It can be used in the QS system of LuxI/LuxR. LuxI synthase catalyzes the production of 3-oxohexanoyl-homoserine lactone (OC6 for short), which belongs to a family of QS molecules called N-Acetyl-Homoserin-Lactones (AHLs). An activated bacterial population can express LuxI and the produced OC6 molecules diffuse outside of this bacterial population to activate another one. Inside the second population, OC6 molecules bind to LuxR, a transcriptional regulator that forms its functional dimer after binding with OC6, which activates the Plux promoter and, therefore, the downstream gene.

Design

We used this transcriptional unit in our Open loop construct (BBa_K4294801)

Sequence and Features

Assembly Compatibility:

10
COMPATIBLE WITH RFC[10]
12
INCOMPATIBLE WITH RFC[12]
Illegal NheI site found at 7
Illegal NheI site found at 30
21
COMPATIBLE WITH RFC[21]
23
COMPATIBLE WITH RFC[23]
25
COMPATIBLE WITH RFC[25]
1000
COMPATIBLE WITH RFC[1000]

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 ==Usage and Biology==
-TetR forms a dimer and binds to tet operators in pTet promoter and blocks the assembly of the transcription machinery. pTet is a medium-strength promoter that is constitutive “ON” in the absence of TetR. It contains two tet operators, one inside the core promoter sequence and the other after the -10 hexamer, leading to efficient repression. The system is efficiently induced via anhydrotetracycline hydrochloride (aTc), a tetracycline derivative which binds Tet R with an ~35-fold higher binding constant, being an effective inducer at very low concentrations. Additionally, its antibiotic activity is ~100-fold lower and has a minimal toxic effect on E.coli cells in the concentration used for induction.
+It can be used in the QS system of LuxI/LuxR. LuxI synthase catalyzes the production of 3-oxohexanoyl-homoserine lactone (OC6 for short), which belongs to a family of QS molecules called N-Acetyl-Homoserin-Lactones (AHLs). An activated bacterial population can express LuxI and the produced OC6 molecules diffuse outside of this bacterial population to activate another one. Inside the second population, OC6 molecules bind to LuxR, a transcriptional regulator that forms its functional dimer after binding with OC6, which activates the Plux promoter and, therefore, the downstream gene.
 ==Design==