1AMY

CRYSTAL AND MOLECULAR STRUCTURE OF BARLEY ALPHA-AMYLASE

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Structure Motif: Primary M-CSA Annotation

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1amya1	All beta proteins	Glycosyl hydrolase domain	Glycosyl hydrolase domain	alpha-Amylases, C-terminal beta-sheet domain	Plant alpha-amylase	(Hordeum vulgare ) [TaxId: 4513 ],	SCOPe (2.08)
A	d1amya2	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	Amylase, catalytic domain	Plant alpha-amylase	(Hordeum vulgare ) [TaxId: 4513 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	(Trans)glycosidases	8043339	3000313	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Glycosyl hydrolase domain-like	8042911	3001528	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Alpha-amyl_C2	e1amyA1	A: beta sandwiches	X: Glycosyl hydrolase domain-like	H: Glycosyl hydrolase domain (From Topology)	T: Glycosyl hydrolase domain	F: Alpha-amyl_C2	ECOD (1.6)
A	Alpha-amylase	e1amyA2	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: Alpha-amylase	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

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)
A	2.60.40.1180	Mainly Beta	Sandwich	Immunoglobulin-like	Golgi alpha-mannosidase II	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00128	Alpha amylase, catalytic domain (Alpha-amylase)	Alpha amylase, catalytic domain	Alpha amylase is classified as family 13 of the glycosyl hydrolases. The structure is an 8 stranded alpha/beta barrel containing the active site, interrupted by a ~70 a.a. calcium-binding domain protruding between beta strand 3 and alpha helix 3, a ...	Alpha amylase is classified as family 13 of the glycosyl hydrolases. The structure is an 8 stranded alpha/beta barrel containing the active site, interrupted by a ~70 a.a. calcium-binding domain protruding between beta strand 3 and alpha helix 3, and a carboxyl-terminal Greek key beta-barrel domain.	Domain
A	PF07821	Alpha-amylase C-terminal beta-sheet domain (Alpha-amyl_C2)	Alpha-amylase C-terminal beta-sheet domain	This domain is organised as a five-stranded anti-parallel beta-sheet [1,2]. It is the probable result of a decay of the common-fold.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	1,4-ALPHA-D-GLUCAN GLUCANOHYDROLASE	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding hydrolase activity, acting on glycosyl bonds amylase activity alpha-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	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR006047	Glycosyl hydrolase, family 13, catalytic domain	Domain
A	IPR012850	Alpha-amylase, C-terminal beta-sheet	Domain
A	IPR013775	Alpha-amylase, plant	Family
A	IPR017853	Glycoside hydrolase superfamily	Homologous Superfamily
A	IPR006046	Alpha amylase	Family
A	IPR013780	Glycosyl hydrolase, all-beta	Homologous Superfamily

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
A	alpha-amylase M-CSA #397	Alpha-amylase catalyses the hydrolysis of internal alpha-glucosidic linkages in starch and other related oligo- and polysaccharides. These enzymes are widespread among the higher plants, animals and micro-organisms. Cereal alpha-amylases play an important role in the production of beer and other alcoholic beverages. In humans, alpha-amylase is present in salivary and pancreatic secretions. Human pancreatic alpha-amylase (HPA) is a 496 amino acid single polypeptide chain which binds to essential calcium and chloride ions, and is responsible for the hydrolysis of the partially digested starch (smaller oligosaccharides) reaching the gut, into glucose. Inhibition of HPA provides an effective target for the treatment of diabetes.	Defined by 3 residues: ASP:A-179GLU:A-204ASP:A-289 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 3.2.1.1 (PDB Primary Data) Search M-CSA Motif + EC 3.2.1.1

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.