Participates in initiation and elongation during chromosome replication; it exhibits DNA-dependent ATPase activity. The intein is an endonuclease. ATP + H2O = ADP + H(+) + phosphate Co-immunoprecipitates with DarG in the presence and absence of darT. Part of the dnaB-darT-darG operon. This protein undergoes a protein self splicing that involves a post-translational excision of the intervening region (intein) followed by peptide ligation. Was identified as a high-confidence drug target. Belongs to the helicase family. DnaB subfamily.