1BYA | pdb_00001bya

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1byaa_	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	Amylase, catalytic domain	beta-Amylase	soybean (Glycine max ) [TaxId: 3847 ],	SCOPe (2.08)

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	(Trans)glycosidases	8033081	3000313	SCOP2B (2022-06-29)

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	DUF711	e1byaA1	A: beta barrels	X: HTH	H: HTH	T: winged helix domain	F: DUF711	ECOD (v294.2)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.20.20.80	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Glycosidases	CATH (4.3.0)

Chains	Accession	Name	Description	Comments	Source
A	PF01373	Glycosyl hydrolase family 14 (Glyco_hydro_14)	Glycosyl hydrolase family 14	This family are beta amylases.	Domain

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	BETA-AMYLASE	hydrolase activity, acting on glycosyl bonds amylase activity beta-amylase activity hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity catalytic activity	carbohydrate metabolic process catabolic process glucan catabolic process carbohydrate catabolic process primary metabolic process macromolecule catabolic process polysaccharide metabolic process glucan metabolic process starch metabolic process polysaccharide catabolic process starch catabolic process metabolic process cellular process macromolecule metabolic process	-

Chains	Accession	Name	Type
A	IPR001371	Glycoside hydrolase, family 14B, plant	Family
A	IPR001554	Glycoside hydrolase, family 14	Family
A	IPR017853	Glycoside hydrolase superfamily	Homologous Superfamily
A	IPR018238	Glycoside hydrolase, family 14, conserved site	Conserved Site

Chains	Enzyme Name	Description	Catalytic Residues
A	beta-amylase M-CSA #436	Beta-amylase (alpha-1,4-glucan maltohydrolase; EC 3.2.1.2) catalyses the release of beta-anomeric maltose from the non-reducing ends of starch. It is known to function by multiple attack, several maltose molecules being produced before the maltooligosaccharide chain is released from the active site. Although known to bind a calcium ion, the metal is not involved in catalysis. On the basis of its sequence alignment, beta-amylase has been classified as belonging to the glycoside hydrolase family 14 (GH14). It is an inverting glycoside hydrolase that is distributed throughout higher plants, oomycetes and bacteria. However, on the basis of sequence comparisons, plant and bacterial beta-amylases can be readily distinguished from each other.	Defined by 5 residues: ASP:A-101GLU:A-186THR:A-342GLU:A-380LEU:A-383 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 3.2.1.2 (PDB Primary Data) Search M-CSA Motif + EC 3.2.1.2

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.