Annotations: 1H54

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1h54a1	All alpha proteins	alpha/alpha toroid	Six-hairpin glycosidases	Glycosyltransferase family 36 C-terminal domain	Lactobacillus maltose phosphorylase, central domain	(Levilactobacillus brevis ) [TaxId: 1580 ],	SCOPe (2.08)
A	d1h54a2	All beta proteins	Supersandwich	Galactose mutarotase-like	Glycosyltransferase family 36 N-terminal domain	Lactobacillus maltose phosphorylase, N-terminal domain	(Levilactobacillus brevis ) [TaxId: 1580 ],	SCOPe (2.08)
A	d1h54a3	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Levilactobacillus brevis ) [TaxId: 1580 ],	SCOPe (2.08)
B	d1h54b1	All alpha proteins	alpha/alpha toroid	Six-hairpin glycosidases	Glycosyltransferase family 36 C-terminal domain	Lactobacillus maltose phosphorylase, central domain	(Levilactobacillus brevis ) [TaxId: 1580 ],	SCOPe (2.08)
B	d1h54b2	All beta proteins	Supersandwich	Galactose mutarotase-like	Glycosyltransferase family 36 N-terminal domain	Lactobacillus maltose phosphorylase, N-terminal domain	(Levilactobacillus brevis ) [TaxId: 1580 ],	SCOPe (2.08)
B	d1h54b3	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Levilactobacillus brevis ) [TaxId: 1580 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Galactose mutarotase-like	8032923	3000035	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Six-hairpin glycosidases	8032921	3000970	SCOP2B (2022-06-29)
B	SCOP2 Family	Glycosyltransferase family 36 N-terminal domain	8020543	4003183	SCOP2 (2022-06-29)
B	SCOP2 Family	Glycosyltransferase family 36 C-terminal domain	8020541	4003063	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Galactose mutarotase-like	8032923	3000035	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Six-hairpin glycosidases	8032921	3000970	SCOP2 (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	PF03636	e1h54A1	A: beta sandwiches	X: Glycosyl hydrolase domain-like	H: supersandwich (From Topology)	T: supersandwich	F: PF03636	ECOD (1.6)
A	PF03633	e1h54A3	A: beta sandwiches	X: Glycosyl hydrolase domain-like	H: Glycoside hydrolase family 127 middle domain-related (From Topology)	T: Glycoside hydrolase family 127 middle domain-related	F: PF03633	ECOD (1.6)
A	PF03632	e1h54A4	A: alpha superhelices	X: Repetitive alpha hairpins	H: alpha/alpha toroid (From Topology)	T: alpha/alpha toroid	F: PF03632	ECOD (1.6)
B	PF03636	e1h54B4	A: beta sandwiches	X: Glycosyl hydrolase domain-like	H: supersandwich (From Topology)	T: supersandwich	F: PF03636	ECOD (1.6)
B	PF03633	e1h54B3	A: beta sandwiches	X: Glycosyl hydrolase domain-like	H: Glycoside hydrolase family 127 middle domain-related (From Topology)	T: Glycoside hydrolase family 127 middle domain-related	F: PF03633	ECOD (1.6)
B	PF03632	e1h54B2	A: alpha superhelices	X: Repetitive alpha hairpins	H: alpha/alpha toroid (From Topology)	T: alpha/alpha toroid	F: PF03632	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.70.98.40	Mainly Beta	Distorted Sandwich	Beta-galactosidase	Chain A, domain 5	CATH (4.3.0)
A	1.50.10.10	Mainly Alpha	Alpha/alpha barrel	Glycosyltransferase		CATH (4.3.0)
A	2.60.420.10	Mainly Beta	Sandwich	Maltose phosphorylase, domain 3	Maltose phosphorylase, domain 3	CATH (4.3.0)
B	2.70.98.40	Mainly Beta	Distorted Sandwich	Beta-galactosidase	Chain A, domain 5	CATH (4.3.0)
B	1.50.10.10	Mainly Alpha	Alpha/alpha barrel	Glycosyltransferase		CATH (4.3.0)
B	2.60.420.10	Mainly Beta	Sandwich	Maltose phosphorylase, domain 3	Maltose phosphorylase, domain 3	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF03636	Glycosyl hydrolase family 65, N-terminal domain (Glyco_hydro_65N)	Glycosyl hydrolase family 65, N-terminal domain	-	Family
A, B	PF03632	Glycosyl hydrolase family 65 central catalytic domain (Glyco_hydro_65m)	Glycosyl hydrolase family 65 central catalytic domain	-	Repeat
A, B	PF03633	Glycosyl hydrolase family 65, C-terminal domain (Glyco_hydro_65C)	Glycosyl hydrolase family 65, C-terminal domain	This family of glycosyl hydrolases contains vacuolar acid trehalase and maltose phosphorylase.Maltose phosphorylase (MP) is a dimeric enzyme that catalyses the conversion of maltose and inorganic phosphate into beta-D-glucose-1-phosphate and glucos ...	This family of glycosyl hydrolases contains vacuolar acid trehalase and maltose phosphorylase.Maltose phosphorylase (MP) is a dimeric enzyme that catalyses the conversion of maltose and inorganic phosphate into beta-D-glucose-1-phosphate and glucose. The C-terminal domain forms a two layered jelly roll motif. This domain is situated at the base of the catalytic domain, however its function remains unknown [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	MALTOSE PHOSPHORYLASE	binding carbohydrate binding catalytic activity	carbohydrate metabolic process organic substance metabolic process primary metabolic process metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR012341	Six-hairpin glycosidase-like superfamily	Homologous Superfamily
A, B	IPR037018	Glycoside hydrolase family 65, N-terminal domain superfamily	Homologous Superfamily
A, B	IPR008928	Six-hairpin glycosidase superfamily	Homologous Superfamily
A, B	IPR005195	Glycoside hydrolase, family 65, central catalytic	Domain
A, B	IPR017045	Maltose phosphorylase/glycosyl hydrolase/vacuolar acid trehalase	Family
A, B	IPR011013	Galactose mutarotase-like domain superfamily	Homologous Superfamily
A, B	IPR005194	Glycoside hydrolase family 65, C-terminal	Domain
A, B	IPR005196	Glycoside hydrolase, family 65, N-terminal	Domain

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

Chains	Enzyme Name	Description	Catalytic Residues
A	maltose phosphorylase M-CSA #649	Maltose phosphorylase (MP) catalyses the conversion of maltose and inorganic phosphate into beta-D-glucose-1-phosphate and glucose without a cofactor. It belongs to family 65 of glycoside hydrolases and can be classed as an inverting phosphorylase for the inversion of the anomeric configuration. The reverse reaction of maltose phosphorylase is of particular interest to synthesise low cost disaccharides for large scale oligosaccharide production.	Defined by 1 residue: GLU:A-487 \| Explore in 3D: M-CSA Motif Definition At least 2 residues must be present to support Structure Motif searching. EC: 2.4.1.8 (PDB Primary Data)

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.