O-GlcNAc
THE GLYCOSYLATION OF A PROTEIN BY ADDITION OF N-ACETYLGLUCOSAMINE VIA THE O3 ATOM OF PEPTIDYL-THREONINE, FORMING O3-N-ACETYLGLUCOSAMINE-L-THREONINE.
O-linked β-N-acetylglucosamine (O-GlcNAc); O-glcnac; O-linked beta-N-acetylglucosamine; O-Linked β-N-acetylglucosamine; O-GlcNAcylation; O GlcNAc; Oglcnac; O-linked glcnac
O-GlcNAc (short for O-linked GlcNAc or O-linked β-N-acetylglucosamine) is a reversible enzymatic post-translational modification that is found on serine and threonine residues of nucleocytoplasmic proteins. The modification is characterized by a β-glycosidic bond between the hydroxyl group of serine or threonine side chains and N-acetylglucosamine (GlcNAc).