Members of this protein family are IcaD (intracellular adhesion protein D), which with catalytic subunit IcaA forms an N-acetylglucosaminyltransferase. In the absence of IcaC, this enzyme forms N-acetylglucosamine oligomers up to 20 in length. [Cell envelope, Biosynthesis and degradation of surface polysaccharides and lipopolysaccharides]
Jiyao W et al.(2023). "The conserved domain database in 2023.",