EpaQ, as described in the Gram-positive bacterium Enterococcus faecalis, is encoded with the enterococcal polysaccharide antigen (epa) operon. It is distantly related to some O-antigen ligases of Gram-negative bacteria, and may have a similar molecular function. EpaQ contributes to biofilm formation and resistance to certain antibiotics.
Jiyao W et al.(2023). "The conserved domain database in 2023.",