Starch synthase (maltosyl-transferring)

Starch synthase (maltosyl-transferring)
Identifiers
EC number 2.4.99.16
Databases
IntEnz IntEnz view
BRENDA BRENDA entry
ExPASy NiceZyme view
KEGG KEGG entry
MetaCyc metabolic pathway
PRIAM profile
PDB structures RCSB PDB PDBe PDBsum

Starch synthase (maltosyl-transferring) (EC 2.4.99.16, alpha1,4-glucan:maltose-1-P maltosyltransferase, GMPMT) is an enzyme with systematic name alpha-maltose 1-phosphate:(1->4)-alpha-D-glucan 4-alpha-D-maltosyltransferase.[1] This enzyme catalyses the following chemical reaction

alpha-maltose 1-phosphate + [(1->4)-alpha-D-glucosyl]n phosphate + [(1->4)-alpha-D-glucosyl]n+2

The enzyme from the bacterium Mycobacterium smegmatis is specific for maltose.

References

  1. Elbein, A.D.; Pastuszak, I.; Tackett, A.J.; Wilson, T.; Pan, Y.T. (2010). "Last step in the conversion of trehalose to glycogen: a mycobacterial enzyme that transfers maltose from maltose 1-phosphate to glycogen". J. Biol. Chem. 285 (13): 9803–9812. doi:10.1074/jbc.M109.033944. PMC 2843229Freely accessible. PMID 20118231.
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