6a2r
Mycobacterium tuberculosis LexA C-domain IIMycobacterium tuberculosis LexA C-domain II
Structural highlights
FunctionLEXA_MYCTU Represses a number of genes involved in the response to DNA damage (SOS response), including recA and lexA. Has been shown to bind to the 14 bp palindromic sequence 5'-CGAACNNNNGTTCG-3'. In the presence of single-stranded DNA, RecA interacts with LexA causing an autocatalytic cleavage which disrupts the DNA-binding part of LexA, leading to derepression of the SOS regulon and eventually DNA repair. |
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