Involvement of iclR and rpoS in the induction of acs, the gene for acetyl coenzyme A synthetase of Escherichia coli K-12.
Two independent pathways in Escherichia coli convert acetate to acetyl CoA: reversal of acetate production by phosphotransacetylase and acetate kinase, and the acetyl-CoA synthetase (Acs) pathway that scavenges acetate. We investigated acs gene expression by using a cat transcriptional fusion. It was observed that acs expression varies depending on the carbon sources used and occurs in the stationary phase of growth even in the absence of acetate. Mutations in iclR for the repressor of the glyoxylate shunt and in rpoS for the stationary phase sigma factor reduced the consumption of acetate mediated by Acs, indicating that both are involved in acs regulation.
Shin
S
S
Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Yusong, Taejon, South Korea.
Song
S G
SG
Lee
D S
DS
Pan
J G
JG
Park
C
C
D000106:Acetate-CoA Ligase / Q000235:genetics*; D019342:Acetic Acid / Q000378:metabolism; D001426:Bacterial Proteins / Q000235:genetics*; D015500:Chloramphenicol O-Acetyltransferase / Q000235:genetics; D003001:Cloning, Molecular; D004926:Escherichia coli / Q000201:enzymology* / Q000235:genetics* / Q000378:metabolism; D029968:Escherichia coli Proteins; D015870:Gene Expression; D005798:Genes, Bacterial; D006038:Glyoxylates / Q000378:metabolism; D010957:Plasmids; D012097:Repressor Proteins / Q000235:genetics*; D012808:Sigma Factor / Q000235:genetics*; D014157:Transcription Factors
D001426:Bacterial Proteins; D029968:Escherichia coli Proteins; D006038:Glyoxylates; D012097:Repressor Proteins; D012808:Sigma Factor; D014157:Transcription Factors; C069567:sigma factor KatF protein, Bacteria; C067479:IclR protein, E coli; D015500:Chloramphenicol O-Acetyltransferase; D000106:Acetate-CoA Ligase; D019342:Acetic Acid