Mechanism	Retaining a
Clan	GH-H
3D Structure Status	( β / α ) 8 barrel
Catalytic Nucleophile/Base	Asp (experimental)
Catalytic Proton Donor	Glu (experimental)
Note	New: many members have been assigned to subfamilies as described by Stam et al. (2006) Protein Eng Des Sel. 19, 555-562 (PMID: 17085431)
External resources	CAZypedia; EBI Protein of the Month; PDB Molecule of the Month;
Statistics	GenBank accession (7); Uniprot accession (65); PDB accession (42); 3D entries (12); cryst (0)

Activity Id	EC#	Activity Name	Residue -2	Bond -1	Residue -1	Reacting Bond	Residue +1	Bond +1	Residue +2	Reactant
H1	3.2.1.1	amylose endo-a-1,4-glucosidase	aDGlcp	1,4	aDGlcp	1,4	aDGlcp	1,4	aDGlcp	H2O
H31	3.2.1.41	pullulan endo-a-1,6-glucosidase	aDGlcp	1,4	aDGlcp	1,6	aDGlcp	1,4	aDGlcp	H2O
H40	3.2.1.54	cyclomaltodextrin endo-a-1,4-glucosidase	aDGlcp	1,4	aDGlcp	1,4	aDGlcp	1,4	aDGlcp(cyclic)	H2O
H51	3.2.1.68	starch endo-a-1,6-glucosidase	aDGlcp	1,4	aDGlcp	1,6	(aDGlcp-1,4)aDGlcp	1,4	aDGlcp	H2O
H107	3.2.1.133	amylose exo-a-1,4-glucobiosidase	[aDGlcp	1,4	aDGlcp	1,4	aDGlcp	1,4	aDGlcp	H2O
H108	3.2.1.135	pullulan exo-a-1,4-panosidase	[(aDGlcp-1,6)aDGlcp	1,4	aDGlcp	1,4	aDGlcp	1,4	aDGlcp	H2O
H196	3.2.1.-	cyclic maltosyl-maltose a-1,6-glucosidase	aDGlcp	1,4	aDGlcp	1,6	aDGlcp	1,4	aDGlcp(cyclic)	H2O
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