Document Type

Article

Publication Date

9-2015

Department

Biological & Earth Sciences

Abstract

GlxR is considered as a global transcriptional regulator controlling a large number of genes having broad physiological aspects in Corynebacterium glutamicum. However, the expression profile revealing the transcriptional control of glxR has not yet been studied in detail. DNA affinity chromatography experiments revealed the binding of transcriptional regulators SucR, RamB, GlxR, and a GntR-type protein (hereafter denoted as GntR3) to the upstream region of glxR. The binding of different regulators to the glxR promoter was confirmed by EMSA experiments. The expression of glxR was analyzed in detail under various carbon sources in the wild-type and different mutant strains. The sucR and gntR3 deletion mutants showed decreased glxR promoter activities, when compared with the wild type, irrespective of the carbon sources. The promoter activity of glxR was derepressed in the ramB deletion mutant under all the tested carbon sources. These results indicate that SucR and GntR3 are acting as activators of GlxR, while RamB plays a repressor. As expected, the expression of glxR in the cyaB and glxR deletion mutants was derepressed under different media conditions, indicating that GlxR is autoregulated.

DOI

https://doi.org/10.4014/jmb.1502.02053

First Page

1216

Last Page

1226

Publication Title

Journal of Microbiology and Biotechnology

Publisher

The Korean Society for Microbiology and Biotechnology

Comments

Original Citation:

Subhadra, B., Ray, D., Han, J. Y., Bae, K.-H., & Lee, J.-K. (2015). Identification of the Regulators Binding to the Upstream Region of glxR in Corynebacterium glutamicum. Journal of Microbiology and Biotechnology. https://doi.org/10.4014/jmb.1502.02053

This is an open-access article.

At the time of publication, Dr. Bindu Subhadra was affiliated with Paichai University.

Download

Included in

Microbiology Commons

Share

COinS