ID   2.4.1.393
DE   MMP alpha-(1->4)-mannosyltransferase.
CA   [3-O-methyl-alpha-D-mannosyl-(1->4)](n)-3-O-methyl-D-mannose + GDP-alpha-
CA   D-mannose = alpha-D-mannosyl-(1->4)-[3-O-methyl-alpha-D-mannosyl-
CA   (1->4)](n)-3-O-methyl-D-mannose + GDP + H(+).
CC   -!- The enzyme, present in mycobacterial species that produce a 3-O-
CC       methylmannose polysaccharide (MMP), is involved in recycling and
CC       biosynthesis of the polymer.
CC   -!- The enzyme has the highest activity with 3-O-methylated mannosides
CC       with 4-6 residues.
CC   -!- The residue at the reducing end of the substrate is often
CC       dimethylated, with the second methyl group attached at the O-1
CC       position.
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