This family consists of several Bacteriophage lambda replication protein P like proteins. The bacteriophage lambda P protein promoters replication of the phage chromosome by recruiting a key component of the cellular replication machinery to the viral origin. Specifically, P protein delivers one or more molecules of Escherichia coli DnaB helicase to a nucleoprotein structure formed by the lambda O initiator at the lambda replication origin [1].

1: Host virus interactions in the initiation of bacteriophage lambda DNA replication. Recruitment of Escherichia coli DnaB helicase by lambda P replication protein. Mallory JB, Alfano C, McMacken R; J Biol Chem 1990;265:13297-13307. PMID:2165499