DNA primase synthesises the RNA primers for the Okazaki fragments in lagging strand DNA synthesis. DNA primase is a heterodimer of large and small subunits. This family also includes baculovirus late expression factor 1 or LEF-1 proteins. Baculovirus LEF-1 is a DNA primase enzyme [1]. The family also contains many bacterial DNA primases.

1: Mutations in conserved yeast DNA primase domains impair DNA replication in vivo. Francesconi S, Longhese MP, Piseri A, Santocanale C, Lucchini G, Plevani P; Proc Natl Acad Sci U S A 1991;88:3877-3881. PMID:2023935

2: Baculovirus replication factor LEF-1 is a DNA primase. Mikhailov VS, Rohrmann GF; J Virol 2002;76:2287-2297. PMID:11836407

3: Origin and evolution of the archaeo-eukaryotic primase superfamily and related palm-domain proteins: structural insights and new members. Iyer LM, Koonin EV, Leipe DD, Aravind L; Nucleic Acids Res. 2005;33:3875-3896. PMID:16027112