IUBMB Enzyme Nomenclature


Accepted name: mannosyl-oligosaccharide 1,3-1,6-α-mannosidase

Reaction: Hydrolysis of the terminal 1,3- and 1,6-linked α-D-mannose residues in the mannosyl-oligosaccharide Man5(GlcNAc)3

For diagram click here.

Other name(s): mannosidase II; exo-1,3-1,6-α-mannosidase; α-D-mannosidase II; α-mannosidase II; α1-3,6-mannosidase; GlcNAc transferase I-dependent α1,3[α1,6]mannosidase; Golgi α-mannosidase II; ManII; 1,3(1,6)-α-D-mannosidase

Systematic name: 1,3-(1,6-)mannosyl-oligosaccharide α-D-mannohydrolase

Comments: Involved in the synthesis of glycoproteins.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 82047-77-6


1. Harpaz, N. and Schachter, H. Control of glycoprotein synthesis. Processing of asparagine-linked oligosaccharides by one or more rat liver Golgi α-D-mannosidases dependent on the prior action of UDP-N-acetylglucosamine: α-D-mannoside β2-N-acetylglucosaminyltransferase I. J. Biol. Chem. 255 (1980) 4894-4902. [PMID: 6445359]

2. Tulsiani, D.R.P., Hubbard, S.C., Robbins, P.W. and Touster, O. α-D-Mannosidases of rat liver Golgi membranes. Mannosidase II is the GlcNAcMAN5-cleaving enzyme in glycoprotein biosynthesis and mannosidases Ia and IB are the enzymes converting Man9 precursors to Man5 intermediates. J. Biol. Chem. 257 (1982) 3660-3668. [PMID: 7061502]

3. Tulsiani, D.R.P., Opheim, D.J. and Touster, O. Purification and characterization of α-D-mannosidase from rat liver golgi membranes. J. Biol. Chem. 252 (1977) 3227-3233. [PMID: 863880]

[EC created 1986]

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