This family consists of various bacterial plasmid replication (Rep) proteins. These proteins are essential for replication of plasmids, the Rep proteins are topoisomerases that nick the positive stand at the plus origin of replication and also at the single-strand conversion sequence [2].

1: Genetic analysis of a lactococcal plasmid replicon. Xu FF, Pearce LE, Yu PL; Mol Gen Genet 1991;227:33-39. PMID:1904536

2: Characterization of a cryptic plasmid from Lactobacillus plantarum. Bates EE, Gilbert HJ; Gene 1989;85:253-258. PMID:2695401