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  4. High-resolution detection of DNA binding sites of the global transcriptional regulator GlxR in Corynebacterium glutamicum
 
research article

High-resolution detection of DNA binding sites of the global transcriptional regulator GlxR in Corynebacterium glutamicum

Jungwirth, Britta
•
Sala, Claudia  
•
Kohl, Thomas A.
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2013
Microbiology-Sgm

The transcriptional regulator GlxR has been characterized as a global hub within the gene-regulatory network of Corynebacterium glutamicum. Chromatin immunoprecipitation with a specific anti-GlxR antibody and subsequent high-throughput sequencing (ChIP-seq) was applied to C. glutamicum to get new in vivo insights into the gene composition of the GlxR regulon. In a comparative approach, C. glutamicum cells were grown with either glucose or acetate as the sole carbon source prior to immunoprecipitation. High-throughput sequencing resulted in 69 million reads and 2.6 Gb of genomic information. After mapping of these data on the genome sequence of C. glutamicum, 107 enriched DNA fragments were detected from cells grown with glucose as carbon source. GlxR binding sites were identified in the sequence of 79 enriched DNA fragments, of which 21 sites were not previously reported. Electrophoretic mobility shift assays with 40-mer oligomers covering the GlxR binding sites were performed for validation of the in vivo results. The detection of new binding sites confirmed the role of GlxR as a regulator of carbon source. metabolism and energy conversion, but additionally revealed binding of GlxR in front of the 6C non-coding RNA gene and to non-canonical DNA binding sites within protein-coding regions. The present study underlines the dynamics within the GlxR regulon by identifying in vivo targets during growth on glucose and contributes to the expansion of knowledge of this important transcriptional regulator.

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Type
research article
DOI
10.1099/mic.0.062059-0
Web of Science ID

WOS:000315561000002

Author(s)
Jungwirth, Britta
Sala, Claudia  
Kohl, Thomas A.
Uplekar, Swapna  
Baumbach, Jan
Cole, Stewart T.  
Puehler, Alfred
Tauch, Andreas
Date Issued

2013

Publisher

Soc General Microbiology

Published in
Microbiology-Sgm
Volume

159

Start page

12

End page

22

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
UPCOL  
Available on Infoscience
March 28, 2013
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/90915
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