Annotations: 4S23

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	GcpE N-terminal domain-like	8053955	3002254	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Nitrite and sulphite reductase 4Fe-4S domain-like	8053960	3000646	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Nitrite and sulphite reductase 4Fe-4S domain-like	8053960	3000646	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	GcpE N-terminal domain-like	8053955	3002254	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	GcpE_C	e4s23A2	A: a+b three layers	X: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 (From Topology)	H: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 (From Topology)	T: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4	F: GcpE_C	ECOD (1.6)
A	GcpE_N	e4s23A1	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: GcpE_N	ECOD (1.6)
B	GcpE_C	e4s23B2	A: a+b three layers	X: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 (From Topology)	H: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 (From Topology)	T: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4	F: GcpE_C	ECOD (1.6)
B	GcpE_N	e4s23B1	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: GcpE_N	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.20.20.20	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Dihydropteroate synthase-like	CATH (4.3.0)
A	3.30.413.10	Alpha Beta	2-Layer Sandwich	Sulfite Reductase Hemoprotein	domain 1	CATH (4.3.0)
B	3.20.20.20	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Dihydropteroate synthase-like	CATH (4.3.0)
B	3.30.413.10	Alpha Beta	2-Layer Sandwich	Sulfite Reductase Hemoprotein	domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF04551	GcpE protein (GcpE)	GcpE protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	4-hydroxy-3-methylbut-2-en-1-yl diphosphate synthase	oxidoreductase activity, acting on CH or CH2 groups, with an iron-sulfur protein as acceptor oxidoreductase activity oxidoreductase activity, acting on CH or CH2 groups 4-hydroxy-3-methylbut-2-en-1-yl diphosphate synthase activity (ferredoxin) catalytic activity iron-sulfur cluster binding binding 4 iron, 4 sulfur cluster binding metal cluster binding small molecule binding 4-hydroxy-3-methylbut-2-enyl-diphosphate synthase activity (flavodoxin) cation binding transition metal ion binding iron ion binding oxidoreductase activity, acting on CH or CH2 groups, with an iron-sulfur protein as acceptor oxidoreductase activity oxidoreductase activity, acting on CH or CH2 groups 4-hydroxy-3-methylbut-2-en-1-yl diphosphate synthase activity (ferredoxin) catalytic activity iron-sulfur cluster binding binding 4 iron, 4 sulfur cluster binding metal cluster binding small molecule binding 4-hydroxy-3-methylbut-2-enyl-diphosphate synthase activity (flavodoxin) cation binding transition metal ion binding iron ion binding ion binding metal ion binding	isoprenoid biosynthetic process isopentenyl diphosphate biosynthetic process, methylerythritol 4-phosphate pathway isopentenyl diphosphate biosynthetic process lipid biosynthetic process carbohydrate derivative metabolic process primary metabolic process glyceraldehyde-3-phosphate metabolic process phospholipid biosynthetic process aldehyde metabolic process phospholipid metabolic process biosynthetic process organophosphate metabolic process organophosphate biosynthetic process phosphate-containing compound metabolic process isoprenoid biosynthetic process isopentenyl diphosphate biosynthetic process, methylerythritol 4-phosphate pathway isopentenyl diphosphate biosynthetic process lipid biosynthetic process carbohydrate derivative metabolic process primary metabolic process glyceraldehyde-3-phosphate metabolic process phospholipid biosynthetic process aldehyde metabolic process phospholipid metabolic process biosynthetic process organophosphate metabolic process organophosphate biosynthetic process phosphate-containing compound metabolic process metabolic process cellular process phosphorus metabolic process lipid metabolic process isoprenoid metabolic process isopentenyl diphosphate metabolic process terpenoid biosynthetic process terpenoid metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR016425	4-hydroxy-3-methylbut-2-en-1-yl diphosphate synthase, bacterial	Family
A, B	IPR011005	Dihydropteroate synthase-like superfamily	Homologous Superfamily
A, B	IPR045854	Nitrite and sulphite reductase 4Fe-4S domain-like superfamily	Homologous Superfamily
A, B	IPR004588	4-hydroxy-3-methylbut-2-en-1-yl diphosphate synthase, bacterial-type	Family

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.