Identification and characterization of a transcriptional regulator, SucR, that influences sucCD transcription in Corynebacterium glutamicum

Hyun Young Cho, Seong Gyu Lee, Jeong Eun Hyeon, Sung Ok Han

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9 Citations (Scopus)

Abstract

We have identified and characterized a novel transcriptional regulator that binds to the promoter region of succinyl-CoA synthetase (sucCD) in Corynebacterium glutamicum. Using biotin-labeled DNA affinity beads, we identified a DeoR-type transcriptional regulator, SucR (Cg0146), which is a protein consisting of 282 amino acids with a mass of 31 kDa and RamB (Cg0444). The results of electrophoretic mobility shift assays verified that these regulators specifically bind to the sucCD promoter region. The putative SucR binding region extends from position -155 to -146 (a 10 bp sequence, ACTCTAGGGG) relative to the transcriptional start point of the sucCD operon. The expression level of sucCD in a sucR deletion mutant was seven times higher than that in wild-type cells grown on acetate. The increase in succinyl-CoA synthetase levels caused by inactivation of sucR. These assays revealed that SucR acts as a repressor of sucCD expression during acetate metabolism.

Original languageEnglish
Pages (from-to)300-305
Number of pages6
JournalBiochemical and Biophysical Research Communications
Volume401
Issue number2
DOIs
Publication statusPublished - 2010 Oct 15

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Keywords

  • Acetate metabolism
  • Corynebacterium glutamicum
  • SucCD expression
  • Succinyl-CoA synthetase
  • Transcriptional regulator

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Cell Biology
  • Molecular Biology

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