PrgU is a protein of plasmid in origin expressed mainly in Enterococcus bacteria. It forms a six beta-strand barrel with three accompanying alpha helices and is probably a homo-dimer in the cell [1]. PrgU probably acts as a RNA-binding regulator that mitigates toxicity accompanying overproduction of PrgB-like adhesins, which are involved in conjugative transfer [2].

1: Specificity determinants of conjugative DNA processing in the Enterococcus faecalis plasmid pCF10 and the Lactococcus lactis plasmid pRS01. Chen Y, Staddon JH, Dunny GM; Mol Microbiol. 2007;63:1549-1564. PMID:17302827

2: PrgU: a suppressor of sex pheromone toxicity in Enterococcus faecalis. Bhatty M, Camacho MI, Gonzalez-Rivera C, Frank KL, Dale JL, Manias DA, Dunny GM, Christie PJ; Mol Microbiol. 2017;103:398-412. PMID:27785854