Annotations: 2AFH

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2afha_	Alpha and beta proteins (a/b)	Chelatase-like	'Helical backbone' metal receptor	Nitrogenase iron-molybdenum protein	automated matches	(Azotobacter vinelandii ) [TaxId: 354 ],	SCOPe (2.08)
C	d2afhc_	Alpha and beta proteins (a/b)	Chelatase-like	'Helical backbone' metal receptor	Nitrogenase iron-molybdenum protein	automated matches	(Azotobacter vinelandii ) [TaxId: 354 ],	SCOPe (2.08)
B	d2afhb_	Alpha and beta proteins (a/b)	Chelatase-like	'Helical backbone' metal receptor	Nitrogenase iron-molybdenum protein	Nitrogenase iron-molybdenum protein, beta chain	(Azotobacter vinelandii ) [TaxId: 354 ],	SCOPe (2.08)
D	d2afhd_	Alpha and beta proteins (a/b)	Chelatase-like	'Helical backbone' metal receptor	Nitrogenase iron-molybdenum protein	Nitrogenase iron-molybdenum protein, beta chain	(Azotobacter vinelandii ) [TaxId: 354 ],	SCOPe (2.08)
E	d2afhe_	Alpha and beta proteins (a/b)	P-loop containing nucleoside triphosphate hydrolases	P-loop containing nucleoside triphosphate hydrolases	Nitrogenase iron protein-like	Nitrogenase iron protein	(Azotobacter vinelandii ) [TaxId: 354 ],	SCOPe (2.08)
F	d2afhf_	Alpha and beta proteins (a/b)	P-loop containing nucleoside triphosphate hydrolases	P-loop containing nucleoside triphosphate hydrolases	Nitrogenase iron protein-like	Nitrogenase iron protein	(Azotobacter vinelandii ) [TaxId: 354 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Helical backbone metal receptor	8043190	3001679	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Helical backbone metal receptor	8043190	3001679	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Helical backbone metal receptor	8043192	3001679	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Helical backbone metal receptor	8043192	3001679	SCOP2B (2022-06-29)
E	SCOP2 Family	NifH/FrxC-like	8017761	4003981	SCOP2 (2022-06-29)
E	SCOP2 Superfamily	Simibi-like P-loop NTPases	8017762	3002018	SCOP2 (2022-06-29)
F	SCOP2B Superfamily	Simibi-like P-loop NTPases	8017762	3002018	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	PF00148	e2afhA1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: Chelatase-like	F: PF00148	ECOD (1.6)
C	PF00148	e2afhC1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: Chelatase-like	F: PF00148	ECOD (1.6)
B	PF00148	e2afhB2	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: Chelatase-like	F: PF00148	ECOD (1.6)
B	PF00148,PF11844	e2afhB1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: Chelatase-like	F: PF00148,PF11844	ECOD (1.6)
D	PF00148	e2afhD2	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: Chelatase-like	F: PF00148	ECOD (1.6)
D	PF00148,PF11844	e2afhD1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: Chelatase-like	F: PF00148,PF11844	ECOD (1.6)
E	PF00142	e2afhE1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: PF00142	ECOD (1.6)
F	PF00142	e2afhF1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: PF00142	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.1980	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Nitrogenase molybdenum iron protein domain	CATH (4.3.0)
C	3.40.50.1980	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Nitrogenase molybdenum iron protein domain	CATH (4.3.0)
B	3.40.50.1980	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Nitrogenase molybdenum iron protein domain	CATH (4.3.0)
B	1.20.89.10	Mainly Alpha	Up-down Bundle	Nitrogenase Molybdenum-iron Protein, subunit B	domain 4	CATH (4.3.0)
D	3.40.50.1980	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Nitrogenase molybdenum iron protein domain	CATH (4.3.0)
D	1.20.89.10	Mainly Alpha	Up-down Bundle	Nitrogenase Molybdenum-iron Protein, subunit B	domain 4	CATH (4.3.0)
E	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)
F	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C	PF00148	Nitrogenase component 1 type Oxidoreductase (Oxidored_nitro)	Nitrogenase component 1 type Oxidoreductase	-	Domain
B, D	PF11844	Domain of unknown function (DUF3364) (DUF3364)	Domain of unknown function (DUF3364)	-	Family
B, D	PF00148	Nitrogenase component 1 type Oxidoreductase (Oxidored_nitro)	Nitrogenase component 1 type Oxidoreductase	-	Domain
E, F	PF00142	4Fe-4S iron sulfur cluster binding proteins, NifH/frxC family (Fer4_NifH)	4Fe-4S iron sulfur cluster binding proteins, NifH/frxC family	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C	Nitrogenase molybdenum-iron protein	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding iron-sulfur cluster binding metal cluster binding oxidoreductase activity oxidoreductase activity, acting on iron-sulfur proteins as donors catalytic activity carbonyl sulfide nitrogenase activity oxidoreductase activity, acting on iron-sulfur proteins as donors, dinitrogen as acceptor cation binding metal ion binding nitrogenase activity	nitrogen cycle metabolic process metabolic process nitrogen fixation	protein-containing complex molybdenum-iron nitrogenase complex catalytic complex nitrogenase complex oxidoreductase complex intracellular protein-containing complex
B, D	Nitrogenase molybdenum-iron protein	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding iron-sulfur cluster binding metal cluster binding oxidoreductase activity oxidoreductase activity, acting on iron-sulfur proteins as donors catalytic activity carbonyl sulfide nitrogenase activity oxidoreductase activity, acting on iron-sulfur proteins as donors, dinitrogen as acceptor cation binding metal ion binding nitrogenase activity	nitrogen cycle metabolic process metabolic process nitrogen fixation	protein-containing complex molybdenum-iron nitrogenase complex catalytic complex nitrogenase complex oxidoreductase complex intracellular protein-containing complex
E, F	Nitrogenase iron protein 1	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding oxidoreductase activity oxidoreductase activity, acting on iron-sulfur proteins as donors catalytic activity carbonyl sulfide nitrogenase activity oxidoreductase activity, acting on iron-sulfur proteins as donors, dinitrogen as acceptor iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding cation binding metal ion binding nitrogenase activity	nitrogen cycle metabolic process metabolic process nitrogen fixation	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C	IPR000510	Nitrogenase/oxidoreductase, component 1	Domain
A, C	IPR005972	Nitrogenase molybdenum-iron protein alpha chain	Family
A, C	IPR000318	Nitrogenase component 1, conserved site	Conserved Site
A, C	IPR010143	Nitrogenase component 1, alpha chain	Family
B, D	IPR000510	Nitrogenase/oxidoreductase, component 1	Domain
B, D	IPR005976	Nitrogenase molybdenum-iron protein beta chain	Family
B, D	IPR000318	Nitrogenase component 1, conserved site	Conserved Site
B, D	IPR024564	Nitrogenase molybdenum-iron protein beta chain, N-terminal	Domain
E, F	IPR030655	NifH/chlL conserved site	Conserved Site
E, F	IPR000392	NifH/frxC family	Family
E, F	IPR005977	Nitrogenase iron protein NifH	Family
E, F	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily

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 R01GM133198.