Article
Mechanism of regulation of transcription initiation by ppGpp. II. Models for positive control based on properties of RNAP mutants and competition for RNAP.
Journal of molecular biology - 26 Jan 2001
Barker M M, Gaal T, Gourse R L
Abstract excerpt
Strains containing ppGpp, a nucleotide whose synthesis is dependent on the RelA and SpoT proteins of Escherichia coli, display slightly lower rRNA promoter activity and much higher amino acid biosynthesis/transport promoter activity than deltarelAdeltaspoT strains. In the accompanying paper, we show that ppGpp directly inhibits rRNA promoter activity in vitro by decreasing the lifetime of the rrn P1 open complex....
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