RT Journal Article SR Electronic(1) A1 Ehira, Shigeki A1 Teramoto, Haruhiko A1 Inui, Masayuki A1 Yukawa, HideakiYR 2010 T1 A novel redox-sensing transcriptional regulator CyeR controls expression of an Old Yellow Enzyme family protein in Corynebacterium glutamicum JF Microbiology, VO 156 IS 5 SP 1335 OP 1341 DO https://doi.org/10.1099/mic.0.036913-0 PB Microbiology Society, SN 1465-2080, AB Corynebacterium glutamicum cgR_2930 (cyeR) encodes a transcriptional regulator of the ArsR family. Its gene product, CyeR, was shown here to repress the expression of cyeR and the cgR_2931 (cye1)–cgR_2932 operon, which is located upstream of cyeR in the opposite orientation. The cye1 gene encodes an Old Yellow Enzyme family protein, members of which have been implicated in the oxidative stress response. CyeR binds to the intergenic region between cyeR and cye1. Expression of cyeR and cye1 is induced by oxidative stress, and the DNA-binding activity of CyeR is impaired by oxidants such as diamide and H2O2. CyeR contains two cysteine residues, Cys-36 and Cys-43. Whereas mutation of the former (C36A) has no effect on the redox regulation of CyeR activity, mutating the latter (C43A, C43S) abolishes the DNA-binding activity of CyeR. Cys-43 of CyeR and its C36A derivative are modified upon treatment with diamide, suggesting an important role for Cys-43 in the redox regulation of CyeR activity. It is concluded that CyeR is a redox-sensing transcriptional regulator that controls cye1 expression., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/mic.0.036913-0