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Catabolite Activator Protein (CAP): An Activator Regulator
Catabolite Activator Protein (CAP) Regulation
When glucose levels fall, E. coli may use other sugars for fuel, but must transcribe new genes to do so. As glucose supplies become limited, cAMP levels increase. This cAMP binds to the CAP protein, a positive regulator that binds to an operator region upstream of the genes required to use other sugar sources.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, Prokaryotic Gene Regulation. October 16, 2013."
http://cnx.org/content/m44535/latest/Figure_16_02_02.jpg
OpenStax CNX
CC BY 3.0.