Replication restart protein PriB

UniProtKB accession:  P07013

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Involved in the restart of stalled replication forks, which reloads the replicative helicase (DnaB) on sites other than the origin of replication; the PriA-PriB pathway is the major replication restart pathway (PubMed:11532137, PubMed:37169801, PubMed:22636770). There are several restart pathways, the PriA-PriB pathway is subdivided into 2 distinct pathways (PubMed:34423481). priB and priC have redundant roles in the cell (PubMed:10540288). During primosome assembly it facilitates complex formation between PriA and DnaT on DNA; stabilizes PriA on DNA, presumably by preventing or inhibiting PriA DNA translocation activity (PubMed:8663104, PubMed:8663105, PubMed:8663106). Forms a branched DNA-PriA-PriB complex when the lagging strand is single-stranded (ss)DNA (PubMed:16188886). Binds ssDNA in the presence and absence of ssDNA DNA-binding protein (SSB), does not bind branched structures (PubMed:8366072, PubMed:16188886). DNA binding, forming spiral filaments on ssDNA, is cooperative (PubMed:16899446). Stimulates the helicase activity of PriA (PubMed:16188886, PubMed:37169801, PubMed:34423481). The homodimer binds 12 nucleotides of ssDNA (PubMed:20156448). Binds homo-pyrimidine tracts better than homo-purine tracts (PubMed:15383524, PubMed:20156448).