UDP-N-acetyl-D-glucosamine:alpha-6-D-mannoside beta-1,2-N- acetylglucosaminyltransferase II (EC 2.4.1.143) (GnT II/MGAT2) is a Golgi resident enzyme that catalyses an essential step in the biosynthetic pathway leading from high mannose to complex N-linked oligosaccharides [1]. Mutations in the MGAT2 gene lead to congenital disorder of glycosylation (CDG IIa). CDG IIa patients have an increased bleeding tendency, unrelated to coagulation factors [2].

1: Molecular cloning and expression of cDNA encoding the rat UDP-N-acetylglucosamine:alpha-6-D-mannoside beta-1,2-N-acetylglucosaminyltransferase II. D'Agostaro GA, Zingoni A, Moritz RL, Simpson RJ, Schachter H, Bendiak B; J Biol Chem 1995;270:15211-15221. PMID:7797505

2: Congenital disorders of glycosylation type Ia and IIa are associated with different primary haemostatic complications. Van Geet C, Jaeken J, Freson K, Lenaerts T, Arnout J, Vermylen J, Hoylaerts MF; J Inherit Metab Dis 2001;24:477-492. PMID:11596651