Difference between revisions of "Part:BBa K174003"
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This tunable switch is biased heads or tails. It can be tuned to control cell differention and fate stochastically. | This tunable switch is biased heads or tails. It can be tuned to control cell differention and fate stochastically. | ||
| − | As an indication of the decision, either Rfp or Gfp is expresed. An invertible region including sigA promoter and Hin CDS is inverted by Hin. The expression of Hin can be controlled by IPTG and Xylose. As a third level, | + | As an indication of the decision, either Rfp or Gfp is expresed. An invertible region including sigA promoter and Hin CDS is inverted by Hin. The expression of Hin can be controlled by IPTG and Xylose. As a third level control, with the modified version of ssrA tag on the C-terminus of the Hin protein, it can quickly be degraded (See [[Part:BBa_K174002]] for arabinose controlled sspB adaptor protein for the degradation). |
Expresion of Hin, hence orientiation of the invertible region is affected by the concentration of IPTG, Xylose, Arabinose, the binding affinity of these inducers to LacI, XlyR, araR respectively and these proteins repression coefficients on ''pspac'', ''xylA'' and ''araE'' promoters. | Expresion of Hin, hence orientiation of the invertible region is affected by the concentration of IPTG, Xylose, Arabinose, the binding affinity of these inducers to LacI, XlyR, araR respectively and these proteins repression coefficients on ''pspac'', ''xylA'' and ''araE'' promoters. | ||
Revision as of 20:32, 19 October 2009
Heritable, Tunable, Stochastic Switch
This tunable switch is biased heads or tails. It can be tuned to control cell differention and fate stochastically.
As an indication of the decision, either Rfp or Gfp is expresed. An invertible region including sigA promoter and Hin CDS is inverted by Hin. The expression of Hin can be controlled by IPTG and Xylose. As a third level control, with the modified version of ssrA tag on the C-terminus of the Hin protein, it can quickly be degraded (See Part:BBa_K174002 for arabinose controlled sspB adaptor protein for the degradation).
Expresion of Hin, hence orientiation of the invertible region is affected by the concentration of IPTG, Xylose, Arabinose, the binding affinity of these inducers to LacI, XlyR, araR respectively and these proteins repression coefficients on pspac, xylA and araE promoters.
Downstream genes after Rfp or Gfp can be used to trigger cell fate decisions.
For more information about this part go to Newcastle iGEM2009 http://2009.igem.org/Team:Newcastle/Stochasticity Stochasticity and http://2009.igem.org/Team:Newcastle/Modelling Modelling pages.
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25INCOMPATIBLE WITH RFC[25]Illegal NgoMIV site found at 1791
Illegal AgeI site found at 105
Illegal AgeI site found at 217 - 1000COMPATIBLE WITH RFC[1000]