Promoters/Catalog

The registry has a large collection of Promoters available. We categorize promoters using two different parameters. First, most promoters are designed for a particular RNA polymerase (RNAP) holoenzyme, e.g E. coli RNAP with a particular sigma factor (for example σ70) that confers specificity on the RNAP holoenzyme , or the RNAP from the T7 bacteriophage. Second, promoters are categorized by the manner in which they are regulated. For example a promoter may be unregulated (constitutive), positively regulated (inducible) or negatively regulated (repressible). Regulated promoters allow you to "program" biological systems. For example, you can perform logic (e.g. "If protein X is present, promoter Y is off") or ensure that a particular gene is only expressed when a particular small molecule is present in the media.

The value of the parts in this catalog increases the more you use them and report your results so please remember to contribute back any data (positive or negative!) that you obtain for any promoters in the catalog.

Regulation	RNA Polymerase
	E. coli		T7
	σ70	σS
Positive Constitutive Negative Multiple	See Unspecified21 promoters	See X promoters	See X promoters
	See X promoters	See X promoters	See X promoters
	See X promoters	See X promoters	See X promoters
	See X promoters	See X promoters	See X promoters