MAN1C1: Proteins and Enzymes

Mannosidases are divided into two subtypes; I and II, (EC numbers 3.2.1.113 and 3.2.1.114 respectively) which display awide expression pattern. Mannosidase I hydrolyzes (1,2)-linked alpha-D-mannose residues in the oligo-mannoseoligosaccharide Man9(GlcNAc)2 and mannosidase II hydrolyzes (1,3)- and (1,6)-linked alpha-D-mannose residues inMan5(GlcNAc)3. Both subtypes require a divalent cation cofactor. Mutations in mannosidases can cause mannosidosis(mannosidase I deficiency).