This domain is found in DNA primase from Staphylococcus aureus (DnaG) and similar proteins predominantly found in firmicutes. DnaG is an RNA polymerase that catalyses the synthesis of short RNA molecules used as primers for DNA polymerase during DNA replication. This entry represents the helical bundle (HB) found at the C-terminal of the catalytic core of DnaG [1].

1: Binding mechanism of metalNTP substrates and stringent-response alarmones to bacterial DnaG-type primases. Rymer RU, Solorio FA, Tehranchi AK, Chu C, Corn JE, Keck JL, Wang JD, Berger JM; Structure. 2012;20:1478-1489. PMID:22795082