1SNZ

Crystal structure of apo human galactose mutarotase

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
Pharos: Disease Associations
Structure Motif: Primary M-CSA Annotation

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1snza1	All beta proteins	Supersandwich	Galactose mutarotase-like	Aldose 1-epimerase (mutarotase)	Galactose mutarotase	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d1snza2	Artifacts	Tags	Tags	Tags	N-terminal Tags	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1snzb_	All beta proteins	Supersandwich	Galactose mutarotase-like	Aldose 1-epimerase (mutarotase)	Galactose mutarotase	human (Homo sapiens ) [TaxId: 9606 ],	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	8057800	3000035	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Galactose mutarotase-like	8057800	3000035	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	Aldose_epim	e1snzA1	A: beta sandwiches	X: Glycosyl hydrolase domain-like	H: supersandwich (From Topology)	T: supersandwich	F: Aldose_epim	ECOD (1.6)
B	Aldose_epim	e1snzB1	A: beta sandwiches	X: Glycosyl hydrolase domain-like	H: supersandwich (From Topology)	T: supersandwich	F: Aldose_epim	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.70.98.10	Mainly Beta	Distorted Sandwich	Beta-galactosidase	Chain A, domain 5	CATH (4.3.0)
B	2.70.98.10	Mainly Beta	Distorted Sandwich	Beta-galactosidase	Chain A, domain 5	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01263	Aldose 1-epimerase (Aldose_epim)	Aldose 1-epimerase	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	aldose 1-epimerase	binding carbohydrate binding isomerase activity aldose 1-epimerase activity racemase and epimerase activity racemase and epimerase activity, acting on carbohydrates and derivatives catalytic activity	carbohydrate metabolic process organic substance metabolic process primary metabolic process metabolic process monosaccharide metabolic process hexose metabolic process small molecule metabolic process galactose metabolic process catabolic process hexose catabolic process carbohydrate catabolic process galactose catabolic process galactose catabolic process via UDP-galactose monosaccharide catabolic process carbohydrate metabolic process organic substance metabolic process primary metabolic process metabolic process monosaccharide metabolic process hexose metabolic process small molecule metabolic process galactose metabolic process catabolic process hexose catabolic process carbohydrate catabolic process galactose catabolic process galactose catabolic process via UDP-galactose monosaccharide catabolic process small molecule catabolic process organic substance catabolic process glucose metabolic process	extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space cellular anatomical entity vesicle extracellular membrane-bounded organelle intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR015443	Aldose 1-epimerase	Family
A, B	IPR008183	Aldose 1-/Glucose-6-phosphate 1-epimerase	Family
A, B	IPR018052	Aldose 1-epimerase, conserved site	Conserved Site
A, B	IPR047215	Galactose mutarotase-like	Family
A, B	IPR014718	Glycoside hydrolase-type carbohydrate-binding	Homologous Superfamily
A, B	IPR011013	Galactose mutarotase-like domain superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B	Pharos: Q96C23	adrenal cortex carcinoma lung carcinoma pancreatic ductal adenocarcinoma diabetes mellitus malignant ependymoma subependymal giant cell astrocytoma glioblastoma malignant glioma tuberculosis

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

Chains	Enzyme Name	Description	Catalytic Residues
A	aldose 1-epimerase M-CSA #351	Aldose 1-epimerase, also known as galactose mutarotase, catalyses the interconversion of beta-D-galactose and alpha-D-galactose, as well as other sugars such as glucose. It is required for normal galactose metabolism, and catalyses the first step of the Leloir pathway. The net result of the pathway is the conversion of beta-D-galactose into alpha-D-glucose-1-phosphate. The enzyme shows an approximately four-fold preference for galactose over gulcose. Mutations of enzymes involved in this pathway are often associated with galactosemia. This hereditary disease presents early onset of cataracts, typically within the first two years of life and in severe cases it can result in liver, kidney and brain damage.	Defined by 3 residues: HIS:A-109 [auth A-107]HIS:A-178 [auth A-176]GLU:A-309 [auth A-307] \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 5.1.3.3 (PDB Primary Data) Search M-CSA Motif + EC 5.1.3.3

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.