Annotations: 3MMA

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d3mmaa3	Alpha and beta proteins (a+b)	Ferredoxin-like	4Fe-4S ferredoxins	Ferredoxin domains from multidomain proteins	DsrA insert domain	(Archaeoglobus fulgidus ) [TaxId: 2234 ],	SCOPe (2.08)
A	d3mmaa1	Alpha and beta proteins (a+b)	Ferredoxin-like	Nitrite/Sulfite reductase N-terminal domain-like	DsrA/DsrB N-terminal-domain-like	Dissimilatory sulfite reductase subunit alpha, DsrA	(Archaeoglobus fulgidus ) [TaxId: 2234 ],	SCOPe (2.08)
A	d3mmaa2	Alpha and beta proteins (a+b)	Nitrite and sulphite reductase 4Fe-4S domain-like	Nitrite and sulphite reductase 4Fe-4S domain-like	Nitrite and sulphite reductase 4Fe-4S domain-like	Dissimilatory sulfite reductase subunit alpha, DsrA	(Archaeoglobus fulgidus ) [TaxId: 2234 ],	SCOPe (2.08)
C [auth D]	d3mmad3	Alpha and beta proteins (a+b)	Ferredoxin-like	4Fe-4S ferredoxins	Ferredoxin domains from multidomain proteins	DsrA insert domain	(Archaeoglobus fulgidus ) [TaxId: 2234 ],	SCOPe (2.08)
C [auth D]	d3mmad1	Alpha and beta proteins (a+b)	Ferredoxin-like	Nitrite/Sulfite reductase N-terminal domain-like	DsrA/DsrB N-terminal-domain-like	Dissimilatory sulfite reductase subunit alpha, DsrA	(Archaeoglobus fulgidus ) [TaxId: 2234 ],	SCOPe (2.08)
C [auth D]	d3mmad2	Alpha and beta proteins (a+b)	Nitrite and sulphite reductase 4Fe-4S domain-like	Nitrite and sulphite reductase 4Fe-4S domain-like	Nitrite and sulphite reductase 4Fe-4S domain-like	Dissimilatory sulfite reductase subunit alpha, DsrA	(Archaeoglobus fulgidus ) [TaxId: 2234 ],	SCOPe (2.08)
B	d3mmab3	Alpha and beta proteins (a+b)	Ferredoxin-like	4Fe-4S ferredoxins	Ferredoxin domains from multidomain proteins	DsrB insert domain	(Archaeoglobus fulgidus ) [TaxId: 2234 ],	SCOPe (2.08)
B	d3mmab1	Alpha and beta proteins (a+b)	Ferredoxin-like	Nitrite/Sulfite reductase N-terminal domain-like	DsrA/DsrB N-terminal-domain-like	Dissimilatory sulfite reductase subunit beta, DsrB	(Archaeoglobus fulgidus ) [TaxId: 2234 ],	SCOPe (2.08)
B	d3mmab2	Alpha and beta proteins (a+b)	Nitrite and sulphite reductase 4Fe-4S domain-like	Nitrite and sulphite reductase 4Fe-4S domain-like	Nitrite and sulphite reductase 4Fe-4S domain-like	Dissimilatory sulfite reductase subunit beta, DsrB	(Archaeoglobus fulgidus ) [TaxId: 2234 ],	SCOPe (2.08)
D [auth E]	d3mmae3	Alpha and beta proteins (a+b)	Ferredoxin-like	4Fe-4S ferredoxins	Ferredoxin domains from multidomain proteins	DsrB insert domain	(Archaeoglobus fulgidus ) [TaxId: 2234 ],	SCOPe (2.08)
D [auth E]	d3mmae1	Alpha and beta proteins (a+b)	Ferredoxin-like	Nitrite/Sulfite reductase N-terminal domain-like	DsrA/DsrB N-terminal-domain-like	Dissimilatory sulfite reductase subunit beta, DsrB	(Archaeoglobus fulgidus ) [TaxId: 2234 ],	SCOPe (2.08)
D [auth E]	d3mmae2	Alpha and beta proteins (a+b)	Nitrite and sulphite reductase 4Fe-4S domain-like	Nitrite and sulphite reductase 4Fe-4S domain-like	Nitrite and sulphite reductase 4Fe-4S domain-like	Dissimilatory sulfite reductase subunit beta, DsrB	(Archaeoglobus fulgidus ) [TaxId: 2234 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Nitrite and sulphite reductase 4Fe-4S domain-like	8039719	3000646	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Nitrite/Sulfite reductase N-terminal domain-like	8039717	3001366	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Nitrite and sulphite reductase 4Fe-4S domain-like	8039719	3000646	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	4Fe-4S ferredoxins	8039714	3000020	SCOP2B (2022-06-29)
C [auth D]	SCOP2B Superfamily	Nitrite/Sulfite reductase N-terminal domain-like	8039717	3001366	SCOP2B (2022-06-29)
C [auth D]	SCOP2B Superfamily	Nitrite and sulphite reductase 4Fe-4S domain-like	8039719	3000646	SCOP2B (2022-06-29)
C [auth D]	SCOP2B Superfamily	Nitrite and sulphite reductase 4Fe-4S domain-like	8039719	3000646	SCOP2B (2022-06-29)
C [auth D]	SCOP2B Superfamily	4Fe-4S ferredoxins	8039714	3000020	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Nitrite/Sulfite reductase N-terminal domain-like	8039722	3001366	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Nitrite and sulphite reductase 4Fe-4S domain-like	8039724	3000646	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Nitrite and sulphite reductase 4Fe-4S domain-like	8039724	3000646	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	4Fe-4S ferredoxins	8039720	3000020	SCOP2B (2022-06-29)
D [auth E]	SCOP2B Superfamily	Nitrite and sulphite reductase 4Fe-4S domain-like	8039724	3000646	SCOP2B (2022-06-29)
D [auth E]	SCOP2B Superfamily	4Fe-4S ferredoxins	8039720	3000020	SCOP2B (2022-06-29)
D [auth E]	SCOP2B Superfamily	Nitrite/Sulfite reductase N-terminal domain-like	8039722	3001366	SCOP2B (2022-06-29)
D [auth E]	SCOP2B Superfamily	Nitrite and sulphite reductase 4Fe-4S domain-like	8039724	3000646	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	dsrA	e3mmaA3	A: a+b two layers	X: 4Fe-4S ferredoxin (From Topology)	H: 4Fe-4S ferredoxin (From Topology)	T: 4Fe-4S ferredoxin	F: dsrA	ECOD (1.6)
A	NIR_SIR_ferr	e3mmaA10	A: a+b two layers	X: Alpha-beta plaits	H: Sulfite reductase, domains 1 and 3 (From Topology)	T: Sulfite reductase, domains 1 and 3	F: NIR_SIR_ferr	ECOD (1.6)
A	NIR_SIR	e3mmaA11	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: NIR_SIR	ECOD (1.6)
C [auth D]	dsrA	e3mmaD2	A: a+b two layers	X: 4Fe-4S ferredoxin (From Topology)	H: 4Fe-4S ferredoxin (From Topology)	T: 4Fe-4S ferredoxin	F: dsrA	ECOD (1.6)
C [auth D]	NIR_SIR_ferr	e3mmaD10	A: a+b two layers	X: Alpha-beta plaits	H: Sulfite reductase, domains 1 and 3 (From Topology)	T: Sulfite reductase, domains 1 and 3	F: NIR_SIR_ferr	ECOD (1.6)
C [auth D]	NIR_SIR	e3mmaD11	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: NIR_SIR	ECOD (1.6)
B	Fer4_21_1	e3mmaB11	A: a+b two layers	X: 4Fe-4S ferredoxin (From Topology)	H: 4Fe-4S ferredoxin (From Topology)	T: 4Fe-4S ferredoxin	F: Fer4_21_1	ECOD (1.6)
B	NIR_SIR_ferr	e3mmaB10	A: a+b two layers	X: Alpha-beta plaits	H: Sulfite reductase, domains 1 and 3 (From Topology)	T: Sulfite reductase, domains 1 and 3	F: NIR_SIR_ferr	ECOD (1.6)
B	NIR_SIR	e3mmaB12	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: NIR_SIR	ECOD (1.6)
D [auth E]	Fer4_21_1	e3mmaE11	A: a+b two layers	X: 4Fe-4S ferredoxin (From Topology)	H: 4Fe-4S ferredoxin (From Topology)	T: 4Fe-4S ferredoxin	F: Fer4_21_1	ECOD (1.6)
D [auth E]	NIR_SIR_ferr	e3mmaE10	A: a+b two layers	X: Alpha-beta plaits	H: Sulfite reductase, domains 1 and 3 (From Topology)	T: Sulfite reductase, domains 1 and 3	F: NIR_SIR_ferr	ECOD (1.6)
D [auth E]	NIR_SIR	e3mmaE12	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: NIR_SIR	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	6.10.140.1420	Special	Helix non-globular	Helix Hairpins		CATH (4.3.0)
A	3.30.70.2500	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.3.0)
A	3.30.413.10	Alpha Beta	2-Layer Sandwich	Sulfite Reductase Hemoprotein	domain 1	CATH (4.3.0)
A	3.30.70.20	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.3.0)
C [auth D]	6.10.140.1420	Special	Helix non-globular	Helix Hairpins		CATH (4.3.0)
C [auth D]	3.30.70.2500	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.3.0)
C [auth D]	3.30.413.10	Alpha Beta	2-Layer Sandwich	Sulfite Reductase Hemoprotein	domain 1	CATH (4.3.0)
C [auth D]	3.30.70.20	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.3.0)
B	3.30.70.3340	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.3.0)
B	3.30.413.10	Alpha Beta	2-Layer Sandwich	Sulfite Reductase Hemoprotein	domain 1	CATH (4.3.0)
B	3.30.70.20	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.3.0)
D [auth E]	3.30.70.3340	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.3.0)
D [auth E]	3.30.413.10	Alpha Beta	2-Layer Sandwich	Sulfite Reductase Hemoprotein	domain 1	CATH (4.3.0)
D [auth E]	3.30.70.20	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C [auth D]	PF03460	Nitrite/Sulfite reductase ferredoxin-like half domain (NIR_SIR_ferr)	Nitrite/Sulfite reductase ferredoxin-like half domain	-	Repeat
A, C [auth D]	PF01077	Nitrite and sulphite reductase 4Fe-4S domain (NIR_SIR)	Nitrite and sulphite reductase 4Fe-4S domain	-	Family
B, D [auth E]	PF03460	Nitrite/Sulfite reductase ferredoxin-like half domain (NIR_SIR_ferr)	Nitrite/Sulfite reductase ferredoxin-like half domain	-	Repeat
B, D [auth E]	PF01077	Nitrite and sulphite reductase 4Fe-4S domain (NIR_SIR)	Nitrite and sulphite reductase 4Fe-4S domain	-	Family
B, D [auth E]	PF00037	4Fe-4S binding domain (Fer4)	4Fe-4S binding domain	Superfamily includes proteins containing domains which bind to iron-sulfur clusters. Members include bacterial ferredoxins, various dehydrogenases, and various reductases. Structure of the domain is an alpha-antiparallel beta sandwich.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C [auth D]	Sulfite reductase, dissimilatory-type subunit alpha	oxidoreductase activity, acting on a sulfur group of donors oxidoreductase activity dissimilatory sulfite reductase activity catalytic activity iron-sulfur cluster binding binding 4 iron, 4 sulfur cluster binding metal cluster binding small molecule binding organic cyclic compound binding tetrapyrrole binding heme binding cation binding ion binding oxidoreductase activity, acting on a sulfur group of donors oxidoreductase activity dissimilatory sulfite reductase activity catalytic activity iron-sulfur cluster binding binding 4 iron, 4 sulfur cluster binding metal cluster binding small molecule binding organic cyclic compound binding tetrapyrrole binding heme binding cation binding ion binding metal ion binding	-	membrane cellular anatomical entity
B, D [auth E]	Sulfite reductase, dissimilatory-type subunit beta	oxidoreductase activity, acting on a sulfur group of donors oxidoreductase activity dissimilatory sulfite reductase activity catalytic activity binding organic cyclic compound binding tetrapyrrole binding heme binding iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding small molecule binding electron transfer activity cation binding oxidoreductase activity, acting on a sulfur group of donors oxidoreductase activity dissimilatory sulfite reductase activity catalytic activity binding organic cyclic compound binding tetrapyrrole binding heme binding iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding small molecule binding electron transfer activity cation binding ion binding metal ion binding	cellular metabolic process sulfur compound metabolic process metabolic process cellular process	membrane cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C [auth D]	IPR006067	Nitrite/sulphite reductase 4Fe-4S domain	Domain
A, C [auth D]	IPR005117	Nitrite/Sulfite reductase ferredoxin-like domain	Domain
A, C [auth D]	IPR017896	4Fe-4S ferredoxin-type, iron-sulphur binding domain	Domain
A, C [auth D]	IPR045854	Nitrite and sulphite reductase 4Fe-4S domain-like superfamily	Homologous Superfamily
A, C [auth D]	IPR036136	Nitrite/Sulfite reductase ferredoxin-like domain superfamily	Homologous Superfamily
A, C [auth D]	IPR045169	Nitrite and sulphite reductase 4Fe-4S domain containing protein	Family
A, C [auth D]	IPR011806	Sulphite reductase, dissimilatory-type alpha subunit	Family
B, D [auth E]	IPR005117	Nitrite/Sulfite reductase ferredoxin-like domain	Domain
B, D [auth E]	IPR011808	Sulphite reductase, dissimilatory-type beta subunit	Family
B, D [auth E]	IPR017900	4Fe-4S ferredoxin, iron-sulphur binding, conserved site	Conserved Site
B, D [auth E]	IPR006067	Nitrite/sulphite reductase 4Fe-4S domain	Domain
B, D [auth E]	IPR017896	4Fe-4S ferredoxin-type, iron-sulphur binding domain	Domain
B, D [auth E]	IPR045854	Nitrite and sulphite reductase 4Fe-4S domain-like superfamily	Homologous Superfamily
B, D [auth E]	IPR036136	Nitrite/Sulfite reductase ferredoxin-like domain superfamily	Homologous Superfamily
B, D [auth E]	IPR045169	Nitrite and sulphite reductase 4Fe-4S domain containing protein	Family

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.