EC Number |
Substrates |
Organism |
Products |
Reversibility |
---|
2.4.99.16 | 2-deoxy-2-fluoro-alpha-maltosyl fluoride + maltotetraose |
- |
Streptomyces coelicolor |
? |
- |
? |
2.4.99.16 | alpha-maltose 1-phosphate + [(1->4)-alpha-D-glucosyl]n |
- |
Mycolicibacterium smegmatis |
phosphate + [(1->4)-alpha-D-glucosyl]n+2 |
- |
? |
2.4.99.16 | alpha-maltose 1-phosphate + [(1->4)-alpha-D-glucosyl]n |
- |
Streptomyces coelicolor |
phosphate + [(1->4)-alpha-D-glucosyl]n+2 |
- |
? |
2.4.99.16 | alpha-maltose 1-phosphate + [(1->4)-alpha-D-glucosyl]n |
liver, oyster, or mycobacterial glycogens are the best acceptors, amylopectin has good activity, but amylose is a poor acceptor. GMPMT also appears to be able to catalyze arsenolysis of glycogen with release of malto-oligosaccharides or at least maltotriose |
Mycolicibacterium smegmatis |
phosphate + [(1->4)-alpha-D-glucosyl]n+2 |
- |
r |
2.4.99.16 | alpha-maltose 1-phosphate + [(1->4)-alpha-D-glucosyl]n |
acceptor and secondary binding sites are identified. The sugar residues in the acceptor subsites +1 to +5 are oriented such that they disfavor the binding of malto-oligosaccharides that bear branches at their 6-positions, consistent with the known acceptor chain specificity of GlgE. A secondary binding site remote from the catalytic center is identified. This site is capable of binding a branched alpha-glucan and is most likely involved in guiding acceptors toward the donor site because its disruption kinetically compromises the ability of GlgE to extend polymeric substrates |
Streptomyces coelicolor |
phosphate + [(1->4)-alpha-D-glucosyl]n+2 |
- |
? |
2.4.99.16 | alpha-maltose 1-phosphate + [(1->4)-alpha-D-glucosyl]n |
- |
Mycolicibacterium smegmatis ATCC 14468 |
phosphate + [(1->4)-alpha-D-glucosyl]n+2 |
- |
? |
2.4.99.16 | alpha-maltose 1-phosphate + [(1->4)-alpha-D-glucosyl]n |
liver, oyster, or mycobacterial glycogens are the best acceptors, amylopectin has good activity, but amylose is a poor acceptor. GMPMT also appears to be able to catalyze arsenolysis of glycogen with release of malto-oligosaccharides or at least maltotriose |
Mycolicibacterium smegmatis ATCC 14468 |
phosphate + [(1->4)-alpha-D-glucosyl]n+2 |
- |
r |
2.4.99.16 | alpha-maltose 1-phosphate + [(1->4)-alpha-D-glucosyl]n |
- |
Streptomyces coelicolor ATCC BAA-471 |
phosphate + [(1->4)-alpha-D-glucosyl]n+2 |
- |
? |
2.4.99.16 | alpha-maltose 1-phosphate + [(1->4)-alpha-D-glucosyl]n |
acceptor and secondary binding sites are identified. The sugar residues in the acceptor subsites +1 to +5 are oriented such that they disfavor the binding of malto-oligosaccharides that bear branches at their 6-positions, consistent with the known acceptor chain specificity of GlgE. A secondary binding site remote from the catalytic center is identified. This site is capable of binding a branched alpha-glucan and is most likely involved in guiding acceptors toward the donor site because its disruption kinetically compromises the ability of GlgE to extend polymeric substrates |
Streptomyces coelicolor ATCC BAA-471 |
phosphate + [(1->4)-alpha-D-glucosyl]n+2 |
- |
? |
2.4.99.16 | more |
GMPMT requires a high-molecular weight alpha-1,4-glucan as the acceptor. The enzyme can also transfer maltosyl units to maltosaccharides, e.g. maltotetraose to maltohexaose, overview |
Mycolicibacterium smegmatis |
? |
- |
? |