Difference between revisions of "Part:BBa K415301"

Revision as of 20:45, 25 October 2010

Low Power Toggle - Ptrc:cI:tt:Plambda:LacI:tt

The original pTSMa plasmid from the Collins paper. This plasmid has been modified so that it now contains cI that is hypersensitive to cleavage by RecA = Low Power Toggle.

From the [http://2010.igem.org/Team:MIT|MIT 2010 iGEM Team].

This part is a variation of a [http://www.pnas.org/content/101/22/8414.full|Collins/Kobayashi UV Toggle] (2004) from an article in PNAS.

This part is a variation of a [http://www.pnas.org/content/101/22/8414.full|Collins/Kobayashi UV Toggle] (2004) from an article in PNAS. It is a bistable toggle (on or off state) and switching to state 1 is induced by UV exposure and to state 2 is IPTG. If the toggle is set with IPTG, the cells will express cI which will inhibit Plambda. If this is exposed to certain levels of UV (see power modulations) cI is cleaved by Rec-A (a UV induced enzyme) and lacI expression begins and inhibits Ptrc.

E.Coli population density as a function of UV exposure. Measured by drip assay.

The following data was taken from cells co-transformed with K415301 (with and Part:BBa_K415023.

UV Power Modulation
Photos (in J/m^2)
FACS (in J/m^2)		[[Image:]]	[[Image:]]	[[Image:]]	[[Image:]]
		0	5	20	40

Sequence and Features