Pol III proofreading activity prevents lesion bypass as evidenced by its molecular signature within E.coli cells.

Abstract excerpt

Replication of genomes that contain blocking DNA lesions entails the transient replacement of the replicative DNA polymerase (Pol) by a polymerase specialized in lesion bypass. Here, we isolate and visualize at nucleotide resolution level, replication intermediates formed during lesion bypass of a single N-2-acetylaminofluorene-guanine adduct (G-AAF) in vivo. In a wild-type strain, a ladder of replication...

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