Members of this family of plasmid partition proteins adopt a ribbon-helix-helix fold, with a core of four alpha-helices. They are an essential component of the DNA partition complex of the multidrug resistance plasmid TP228 [1].

1: ParG, a protein required for active partition of bacterial plasmids, has a dimeric ribbon-helix-helix structure. Golovanov AP, Barilla D, Golovanova M, Hayes F, Lian LY; Mol Microbiol. 2003;50:1141-1153. PMID:14622405