Glucan 1,4-alpha-maltohydrolase

Glucan 1,4-alpha-maltohydrolase (EC 3.2.1.133, maltogenic alpha-amylase, 1,4-alpha-D-glucan alpha-maltohydrolase) is an enzyme with systematic name 4-alpha-D-glucan alpha-maltohydrolase.^[1][2] This enzyme catalyses the following chemical reaction

hydrolysis of (1->4)-alpha-D-glucosidic linkages in polysaccharides so as to remove successive alpha-maltose residues from the non-reducing ends of the chains

Glucan 1,4-alpha-maltohydrolase
Identifiers
EC no.	3.2.1.133
CAS no.	160611-47-2
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Search PMC articles PubMed articles NCBI proteins

This enzyme acts on starch and related polysaccharides and oligosaccharides. Maltogenic amylases from Bacillus stearothermophilus,^[3] Thermus sp.^[4] and Geobacillus thermoleovorans^[5] are able to degrade acarbose to glucose and acarviosine-glucose.

Acarbose is degraded by different enzymes in the gut microbiome. secretion of gut bacterial enzymes inhibit acarbose.