This family consists of several VirC2 proteins which seem to be found exclusively in Agrobacterium species and Rhizobium etli. VirC2 is known to be involved in virulence in Agrobacterium species but its exact function is unclear [1,2].

1: Molecular characterization of the virC genes of the Ti plasmid. Close TJ, Tait RC, Rempel HC, Hirooka T, Kim L, Kado CI; J Bacteriol 1987;169:2336-2344. PMID:3584058

2: Molecular characterization of a host-range-determining locus from Agrobacterium tumefaciens. Yanofsky MF, Nester EW; J Bacteriol 1986;168:244-250. PMID:3759904