umuD
Function
Involved in UV protection and mutation. Poorly processive, error-prone DNA polymerase involved in translesion repair (PubMed:10801133). Essential for induced (or SOS) mutagenesis. Able to replicate DNA across DNA lesions (thymine photodimers and abasic sites, called translesion synthesis) in the presence of activated RecA; efficiency is maximal in the presence of the beta sliding-clamp and clamp-loading complex of DNA polymerase III plus single-stranded binding protein (SSB) (PubMed:10801133). RecA and to a lesser extent the beta clamp-complex may target Pol V to replication complexes stalled at DNA template lesions (PubMed:10801133).
Sequence Similarities
Belongs to the peptidase S24 family.
Alternative names
b1183, JW1172, umuD, Protein UmuD, DNA polymerase V, Pol V