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- W2015706250 abstract "LexA repressor undergoes a self-cleavage reaction. In vivo, this reaction requires an activated form of RecA, but it occurs spontaneously in vitro at high pH. Accordingly, LexA must both allow self-cleavage and yet prevent this reaction in the absence of a stimulus. We have solved the crystal structures of several mutant forms of LexA. Strikingly, two distinct conformations are observed, one compatible with cleavage, and the other in which the cleavage site is approximately 20 A from the catalytic center. Our analysis provides insight into the structural and energetic features that modulate the interconversion between these two forms and hence the rate of the self-cleavage reaction. We suggest RecA activates the self-cleavage of LexA and related proteins through selective stabilization of the cleavable conformation." @default.
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- W2015706250 date "2001-09-01" @default.
- W2015706250 modified "2023-10-15" @default.
- W2015706250 title "Crystal Structure of LexA" @default.
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- W2015706250 doi "https://doi.org/10.1016/s0092-8674(01)00479-2" @default.
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