Signalling

Part:BBa_F2620

Designed by: Barry Canton [bcanton@mit.edu] and Anna Labno [labnoa@mit.edu]   Group: MIT   (2004-08-09)
Input: 3OC6HSL
Output: PoPS

tetR
R0040
LuxR
I0462
lux pR
R0062
BBa F2620Icon.png

Part Main Page        Transfer Function        Specificity        Response time        Stability        Add Data       


Description
A transcription factor, LuxR (BBa_C0062) that is active in the presence of cell-cell signaling molecule 3OC6HSL is controlled by a TetR (BBa_C0040) regulated operator (BBa_R0040). Device input is 3OC6HSL. Device output is PoPS from a LuxR-regulated operator. If used in a cell containing TetR then a second input signal such as aTc can be used to produce a logical AND function. Get the pdf datasheet here.


Performance

Experiment1 Characteristic1 Value1
Transfer Function Maximum Output 6.6 PoPS cell-1
Hill coefficient 1.6
Switch Point 1.5E-9 M 3OC6HSL, exogenous
Response time: <1 min
Input compatibility Strong response to 3OC6HSL, C6HSL , C7HSL, 3OC8HSL, C8HSL
Weak response to C4HSL, C10HSL, C12HSL
Stability Genetic Stability
(Low/High Input)
>92/>56 generations
Performance Stability
(Low/High Input)
>92/>56 generations
Demand Internal Demand
(Low/High Input)
Not measured
Transcriptional output demand:
(Low/High Input)
Nt = length of downstream transcript in nucleotides
(0/6xNt) nucleotides cell-1 s-1
(0/1.5E-1xNt) RNAP cell-1
Growth Rate
(Low/High Input)
54/59 min Doubling time

1Measured by Ania Labno and Barry Canton 2006-2007

Compatibility
Chassis: Device has been shown to work in BBa_V1000,BBa_V1001,BBa_V1002, E.Coli S30 Extract (data)
Plasmids: Device has been shown to work on pSB3K3 and pSB1A3
Devices: Device has been shown to work with BBa_E0430, BBa_E0434, BBa_E0240
Crosstalk with systems containing BBa_C0040.
Cell-Cell Signaling Systems: Crosstalk with devices using 3OC6HSL, C6HSL, C7HSL, C8HSL, C10HSL.

Contribution: Arizona_State 2016

Authors: Ernesto Luna, Brady Dennison, Cassandra Barrett, Jimmy Xu, Jiaqi Wu, Dr. Karmella Haynes

The 2016 Arizona_State team ran a series of induction tests on 10 AHL Senders (naturally-produced by an BL21 E.coli chassis) and 5 synthetic AHL variants using Bba_F2620 as the output device. This included a series of visual plate induction tests as well as an 8-hour GFP absorbance read. This contribution aims to expand the characterization of this part by identifying crosstalk partners as well as potential orthogonal systems.

The table below summarized the findings of our induction test. Note: these results are not conclusive and are simply what the collected data indicated from our 8-hour induction test.

T--Arizona State--f2620table.png

Two runs at two different concentrations (100nM and 1uM) using synthetic AHLs yielded some interesting differences, with synthetic p-Coumaroyl showing no induction while synthetic C12-HSL did induce. More in-depth figures and data can be found under the Experience tab of this part.

[edit]
Categories
//classic/signalling/receiver
//function/cellsignalling
Parameters
controlR0040
device_typeReceiver
family
latencySeconds
proteinsLuxR, TetR
signalling_molecule3OC6HSL
switch_point2nM