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NtrC is the name of the protein necessary for the procaryotic regulon transcription factor sigma N (sigma 54) to form an open complex with RNA polymerase in order to activate glnA transcription. The open --> closed conformational change of the sigmaN-RNA polymerase complex around the glutamine synthetase gene promoter requires ATP and involves the 180 degree turn of the DNA so that the NtrC protein (bound to two -140 and -108 upstream enhancer regions) may interact directly with the promoter-bound sigma N-RNA polymerase complex.
Additional recommended knowledge
Lecture notes, Molecular Genetics 3 at Edinburgh University autumn 2006
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "NtrC". A list of authors is available in Wikipedia.|