Annotations: 4QLB

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Glycogen_syn_1st	e4qlbA2	A: a/b three-layered sandwiches	X: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	H: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	T: UDP-Glycosyltransferase/glycogen phosphorylase	F: Glycogen_syn_1st	ECOD (1.6)
A	Glycogen_syn_2nd	e4qlbA1	A: a/b three-layered sandwiches	X: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	H: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	T: UDP-Glycosyltransferase/glycogen phosphorylase	F: Glycogen_syn_2nd	ECOD (1.6)
B [auth C]	Glycogen_syn_1st	e4qlbC1	A: a/b three-layered sandwiches	X: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	H: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	T: UDP-Glycosyltransferase/glycogen phosphorylase	F: Glycogen_syn_1st	ECOD (1.6)
B [auth C]	Glycogen_syn_2nd	e4qlbC2	A: a/b three-layered sandwiches	X: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	H: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	T: UDP-Glycosyltransferase/glycogen phosphorylase	F: Glycogen_syn_2nd	ECOD (1.6)
C [auth D]	Glycogen_syn_1st	e4qlbD1	A: a/b three-layered sandwiches	X: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	H: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	T: UDP-Glycosyltransferase/glycogen phosphorylase	F: Glycogen_syn_1st	ECOD (1.6)
C [auth D]	Glycogen_syn_2nd	e4qlbD2	A: a/b three-layered sandwiches	X: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	H: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	T: UDP-Glycosyltransferase/glycogen phosphorylase	F: Glycogen_syn_2nd	ECOD (1.6)
D [auth B]	Glycogen_syn_1st	e4qlbB2	A: a/b three-layered sandwiches	X: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	H: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	T: UDP-Glycosyltransferase/glycogen phosphorylase	F: Glycogen_syn_1st	ECOD (1.6)
D [auth B]	Glycogen_syn_2nd	e4qlbB1	A: a/b three-layered sandwiches	X: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	H: UDP-Glycosyltransferase/glycogen phosphorylase (From Topology)	T: UDP-Glycosyltransferase/glycogen phosphorylase	F: Glycogen_syn_2nd	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.2000	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Glycogen Phosphorylase B	CATH (4.3.0)
B [auth C]	3.40.50.2000	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Glycogen Phosphorylase B	CATH (4.3.0)
C [auth D]	3.40.50.2000	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Glycogen Phosphorylase B	CATH (utative)
D [auth B]	3.40.50.2000	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Glycogen Phosphorylase B	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B [auth C], C [auth D], D [auth B]	PF05693	Glycogen synthase (Glycogen_syn)	Glycogen synthase	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B [auth C], C [auth D], D [auth B]	Probable glycogen [starch] synthase	UDP-glycosyltransferase activity glycogen (starch) synthase activity glycosyltransferase activity transferase activity glucosyltransferase activity hexosyltransferase activity catalytic activity UDP-glucosyltransferase activity	carbohydrate metabolic process glucan biosynthetic process polysaccharide biosynthetic process energy derivation by oxidation of organic compounds cellular biosynthetic process carbohydrate biosynthetic process cellular metabolic process glycogen metabolic process primary metabolic process generation of precursor metabolites and energy glycogen biosynthetic process macromolecule biosynthetic process polysaccharide metabolic process organic substance metabolic process glucan metabolic process carbohydrate metabolic process glucan biosynthetic process polysaccharide biosynthetic process energy derivation by oxidation of organic compounds cellular biosynthetic process carbohydrate biosynthetic process cellular metabolic process glycogen metabolic process primary metabolic process generation of precursor metabolites and energy glycogen biosynthetic process macromolecule biosynthetic process polysaccharide metabolic process organic substance metabolic process glucan metabolic process biosynthetic process organic substance biosynthetic process metabolic process cellular process energy reserve metabolic process macromolecule metabolic process	intracellular anatomical structure cytoplasm cellular anatomical entity
E [auth G], F [auth E], G [auth H], H [auth F]	Protein GYG-1, isoform b	glycosyltransferase activity transferase activity catalytic activity cation binding ion binding binding metal ion binding small molecule binding UDP-glycosyltransferase activity glycogenin glucosyltransferase activity glucosyltransferase activity hexosyltransferase activity UDP-glucosyltransferase activity UDP-alpha-D-glucose:glucosyl-glycogenin alpha-D-glucosyltransferase activity	carbohydrate metabolic process glucan biosynthetic process polysaccharide biosynthetic process energy derivation by oxidation of organic compounds cellular biosynthetic process carbohydrate biosynthetic process cellular metabolic process glycogen metabolic process primary metabolic process generation of precursor metabolites and energy glycogen biosynthetic process macromolecule biosynthetic process polysaccharide metabolic process organic substance metabolic process glucan metabolic process carbohydrate metabolic process glucan biosynthetic process polysaccharide biosynthetic process energy derivation by oxidation of organic compounds cellular biosynthetic process carbohydrate biosynthetic process cellular metabolic process glycogen metabolic process primary metabolic process generation of precursor metabolites and energy glycogen biosynthetic process macromolecule biosynthetic process polysaccharide metabolic process organic substance metabolic process glucan metabolic process biosynthetic process organic substance biosynthetic process metabolic process cellular process energy reserve metabolic process macromolecule metabolic process	intracellular anatomical structure cellular anatomical entity intracellular organelle organelle intracellular non-membrane-bounded organelle contractile muscle fiber cytoplasm supramolecular fiber supramolecular polymer supramolecular complex striated muscle dense body non-membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B [auth C], C [auth D], D [auth B]	IPR008631	Glycogen synthase	Family
E [auth G], F [auth E], G [auth H], H [auth F]	IPR002495	Glycosyl transferase, family 8	Family
E [auth G], F [auth E], G [auth H], H [auth F]	IPR029044	Nucleotide-diphospho-sugar transferases	Homologous Superfamily

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.