Replicative DNA helicase DnaB

UniProtKB accession:  P0ACB0

Grouped By:  Matching UniProtKB accession

UniProtKB description:  The main replicative DNA helicase, it participates in initiation and elongation during chromosome replication. Travels ahead of the DNA replisome, separating dsDNA into templates for DNA synthesis. A processive ATP-dependent 5'-3' DNA helicase that acts on preformed replication forks (have single-stranded (ss)DNA tails) (PubMed:3007474). ATP is the best nucleotide for helicase activity; GTP, CTP, dCTP and dATP are poor substitutes (PubMed:3007474). Participates with DNA primase DnaG in primer RNA (pRNA) synthesis during initiation of DNA replication (PubMed:7532169). Has DNA-dependent ATPase activity (PubMed:7532169). Is loaded onto ssDNA via the action of DnaC; ssDNA binds to the central pore in the DnaB(6):DnaC(6) complex, making contacts with both subunits (PubMed:30797687).