Control of ilvIH transcription during amino acid downshift in stringent and relaxed strains of Escherichia coli

FEMS Microbiol Lett. 1995 Aug 15;131(1):95-8. doi: 10.1111/j.1574-6968.1995.tb07760.x.

Abstract

Transcription of the ilvIH operon was reduced during amino acid starvation of wild-type Escherichia coli. The effect was abolished by a relA mutation and was enhanced by a spoT mutation, thus suggesting a possible negative role of ppGpp accumulation on ilvIH transcription. No effect of amino acid downshift was observed on the synthesis of lrp mRNA, encoding the positive regulator (Lrp) of ilvIH transcription.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acids / genetics*
  • Amino Acids / metabolism
  • Bacterial Proteins / genetics*
  • Base Sequence
  • DNA-Binding Proteins / genetics*
  • Escherichia coli / genetics*
  • Escherichia coli Proteins
  • Gene Expression Regulation, Bacterial / genetics*
  • Genes, Bacterial / genetics
  • Leucine-Responsive Regulatory Protein
  • Molecular Sequence Data
  • Operon / genetics
  • RNA, Bacterial / analysis
  • Transcription Factors / genetics*
  • Transcription, Genetic / genetics

Substances

  • Amino Acids
  • Bacterial Proteins
  • DNA-Binding Proteins
  • Escherichia coli Proteins
  • Lrp protein, E coli
  • RNA, Bacterial
  • Transcription Factors
  • Leucine-Responsive Regulatory Protein