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|2zoy, resolution 1.90Å ()|
|Gene:||Cgl2612 (Corynebacterium glutamicum ATCC 13032)|
|Related:|| 2zoz, 2yve, 2yvh
The multi-drug binding transcriptional repressor CgmR (CGL2612 protein) from C.glutamicum
The emergence of antibiotic-resistant bacteria often causes serious clinical problems. The TetR family is one of the major transcription factor families that regulate expression of genes involved in bacterial antimicrobial resistance systems. CGL2612 protein is a transcription factor newly identified by genomic DNA analysis on Corynebacterium glutamicum, which belongs to the mycolic acid-containing Actinomycetales, including the well known pathogens Corynebacterium diphtheriae and Mycobacterium tuberculosis. Crystal structure analysis showed that the CGL2612 protein exhibits significant structural similarity to the multidrug resistance (MDR)-related transcription factor QacR from Staphylococcus aureus, despite poor amino acid sequence similarity between these proteins. Binding DNA sequence analysis of CGL2612 protein using the systematic evolution of ligands by the exponential enrichment (systematic evolution of ligands by exponential enrichment, or SELEX) method revealed that this protein is a new member of the TetR family, which regulates expression of the immediately upstream gene, cgl2611, probably encoding a major facilitator superfamily permease. Subsequent functional analyses confirmed a function of the CGL2612 as a transcriptional repressor responsible for the antimicrobial resistance system in C. glutamicum. The strategy used in the present study is one of the most convenient and powerful methods to analyze functionally unknown transcription factors, and the results obtained here will contribute to our understanding of the drug resistance mechanism not only in C. glutamicum but also in the related bacteria, C. diphtheriae and M. tuberculosis.
The CGL2612 protein from Corynebacterium glutamicum is a drug resistance-related transcriptional repressor: structural and functional analysis of a newly identified transcription factor from genomic DNA analysis., Itou H, Okada U, Suzuki H, Yao M, Wachi M, Watanabe N, Tanaka I, J Biol Chem. 2005 Nov 18;280(46):38711-9. Epub 2005 Sep 15. PMID:16166084
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
About this Structure
2zoy is a 2 chain structure with sequence from Corynebacterium glutamicum atcc 13032. This structure supersedes the now removed PDB entry 1v7b. Full crystallographic information is available from OCA.
- Itou H, Okada U, Suzuki H, Yao M, Wachi M, Watanabe N, Tanaka I. The CGL2612 protein from Corynebacterium glutamicum is a drug resistance-related transcriptional repressor: structural and functional analysis of a newly identified transcription factor from genomic DNA analysis. J Biol Chem. 2005 Nov 18;280(46):38711-9. Epub 2005 Sep 15. PMID:16166084 doi:10.1074/jbc.M505999200