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- W2003103534 abstract "The RecA-dependent DNA damage response pathway (SOS response) appears to be the major DNA repair mechanism in most bacteria, but it has been suggested that a RecA-independent mechanism is responsible for controlling expression of most damage-inducible DNA repair genes in Mycobacterium tuberculosis. The specific reparative responses and molecular mediators involved in the DNA repair mechanism remain largely unclear in this pathogen and its related species. In this study, a mycobacterial ClpR-like regulator, corresponding to Rv2745c in M. tuberculosis and to Ms2694 in M. smegmatis mc(2)155, was found to interact with the promoter regions of multiple damage-inducible DNA repair genes. Specific binding of the ClpR-like factor to the conserved RecA-independent promoter RecA-NDp motif was then confirmed using in vitro electrophoretic mobility shift assays as well as in vivo chromatin immunoprecipitation experiments. The ClpR knock-out experiments, in combination with quantitative real time PCR assays, demonstrated that the expression of these RecA-independent genes were significantly down-regulated in the mutant strain of M. smegmatis in response to a DNA-damaging agent compared with the wild type strain. Furthermore, the ClpR-like factor was shown to contribute to mycobacterial genomic stability. These results enhance our understanding of the function of the ClpR regulator and the regulatory mechanism of RecA-independent DNA repair in mycobacteria." @default.
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- W2003103534 date "2011-09-01" @default.
- W2003103534 modified "2023-09-29" @default.
- W2003103534 title "ClpR Protein-like Regulator Specifically Recognizes RecA Protein-independent Promoter Motif and Broadly Regulates Expression of DNA Damage-inducible Genes in Mycobacteria" @default.
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- W2003103534 doi "https://doi.org/10.1074/jbc.m111.241802" @default.
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