1N2C
NITROGENASE COMPLEX FROM AZOTOBACTER VINELANDII STABILIZED BY ADP-TETRAFLUOROALUMINATE
External Resource: Annotation
Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage
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 | SCOP2B Superfamily | Simibi-like P-loop NTPases | 8017762 | 3002018 | SCOP2B (2022-06-29) |
G | SCOP2B Superfamily | Simibi-like P-loop NTPases | 8017762 | 3002018 | SCOP2B (2022-06-29) |
F | SCOP2B Superfamily | Simibi-like P-loop NTPases | 8017762 | 3002018 | SCOP2B (2022-06-29) |
H | 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 | Oxidored_nitro_3rd | e1n2cA1 | A: a/b three-layered sandwiches | X: Flavodoxin-like | H: Class I glutamine amidotransferase-like | T: Chelatase-like | F: Oxidored_nitro_3rd | ECOD (1.6) |
C | Oxidored_nitro_3rd | e1n2cC1 | A: a/b three-layered sandwiches | X: Flavodoxin-like | H: Class I glutamine amidotransferase-like | T: Chelatase-like | F: Oxidored_nitro_3rd | ECOD (1.6) |
B | Oxidored_nitro_3rd | e1n2cB1 | A: a/b three-layered sandwiches | X: Flavodoxin-like | H: Class I glutamine amidotransferase-like | T: Chelatase-like | F: Oxidored_nitro_3rd | ECOD (1.6) |
B | Oxidored_nitro_1st | e1n2cB2 | A: a/b three-layered sandwiches | X: Flavodoxin-like | H: Class I glutamine amidotransferase-like | T: Chelatase-like | F: Oxidored_nitro_1st | ECOD (1.6) |
B | UNK_F_TYPE | e1n2cB3 | A: a/b three-layered sandwiches | X: Flavodoxin-like | H: Class I glutamine amidotransferase-like | T: Chelatase-like | F: UNK_F_TYPE | ECOD (1.6) |
D | Oxidored_nitro_3rd | e1n2cD2 | A: a/b three-layered sandwiches | X: Flavodoxin-like | H: Class I glutamine amidotransferase-like | T: Chelatase-like | F: Oxidored_nitro_3rd | ECOD (1.6) |
D | Oxidored_nitro_1st | e1n2cD1 | A: a/b three-layered sandwiches | X: Flavodoxin-like | H: Class I glutamine amidotransferase-like | T: Chelatase-like | F: Oxidored_nitro_1st | ECOD (1.6) |
D | UNK_F_TYPE | e1n2cD3 | A: a/b three-layered sandwiches | X: Flavodoxin-like | H: Class I glutamine amidotransferase-like | T: Chelatase-like | F: UNK_F_TYPE | ECOD (1.6) |
E | AAA_31 | e1n2cE1 | A: a/b three-layered sandwiches | X: P-loop domains-like | H: P-loop domains-related | T: P-loop containing nucleoside triphosphate hydrolases | F: AAA_31 | ECOD (1.6) |
G | AAA_31 | e1n2cG1 | A: a/b three-layered sandwiches | X: P-loop domains-like | H: P-loop domains-related | T: P-loop containing nucleoside triphosphate hydrolases | F: AAA_31 | ECOD (1.6) |
F | AAA_31 | e1n2cF1 | A: a/b three-layered sandwiches | X: P-loop domains-like | H: P-loop domains-related | T: P-loop containing nucleoside triphosphate hydrolases | F: AAA_31 | ECOD (1.6) |
H | AAA_31 | e1n2cH1 | A: a/b three-layered sandwiches | X: P-loop domains-like | H: P-loop domains-related | T: P-loop containing nucleoside triphosphate hydrolases | F: AAA_31 | ECOD (1.6) |
Domain Annotation: CATH CATH Database Homepage
Protein Family Annotation Pfam Database Homepage
Chains | Accession | Name | Description | Comments | Source |
---|---|---|---|---|---|
PF00148 | Nitrogenase component 1 type Oxidoreductase (Oxidored_nitro) | Nitrogenase component 1 type Oxidoreductase | - | Domain | |
PF11844 | Domain of unknown function (DUF3364) (DUF3364) | Domain of unknown function (DUF3364) | - | Family | |
PF00148 | Nitrogenase component 1 type Oxidoreductase (Oxidored_nitro) | Nitrogenase component 1 type Oxidoreductase | - | Domain | |
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
InterPro: Protein Family Classification InterPro Database Homepage
Chains | Accession | Name | Type |
---|---|---|---|
IPR000510 | Nitrogenase/oxidoreductase, component 1 | Domain | |
IPR005972 | Nitrogenase molybdenum-iron protein alpha chain | Family | |
IPR000318 | Nitrogenase component 1, conserved site | Conserved Site | |
IPR010143 | Nitrogenase component 1, alpha chain | Family | |
IPR000510 | Nitrogenase/oxidoreductase, component 1 | Domain | |
IPR005976 | Nitrogenase molybdenum-iron protein beta chain | Family | |
IPR000318 | Nitrogenase component 1, conserved site | Conserved Site | |
IPR050152 | ChlB/BchB/BchZ | Family | |
IPR024564 | Nitrogenase molybdenum-iron protein beta chain, N-terminal | Domain | |
IPR030655 | NifH/chlL conserved site | Conserved Site | |
IPR000392 | NifH/frxC family | Family | |
IPR005977 | Nitrogenase iron protein NifH | Family | |
IPR027417 | P-loop containing nucleoside triphosphate hydrolase | Homologous Superfamily |
Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage
Chains | Enzyme Name | Description | Catalytic Residues |
---|---|---|---|
nitrogenase M-CSA #212 | The nitrogenase complex from Azotobacter vinelandii catalyses the reduction of atmospheric nitrogen to ammonia, coupled to the hydrolysis of ATP and the oxidation of ferrodoxin. It is composed of two enzyme components: the Fe protein and the MoFe protein. The Fe protein catalyses the hydrolysis of ATP and consequently transfers electron to the MoFe protein. The MoFe protein contains the FeMo-cofactor which is composed of molybdenum, a [7Fe-9S] cluster, and homocitrate, and the P-cluster which is composed of a [8Fe-7S] cluster. The reducing electrons ultimately come from an external electron donor such as ferredoxin, through the Fe protein to the FeMo-cofactor [PMID:17614310, PMID:14551236]. The complex is formed as a heterotetramer of the FeMo protein, with one homodimer of Fe protein associated with each of the two alpha-beta subunits. The FeMo protein contains the FeMo-cofactor which contains a Fe7MoS9-homocitrate cofactor (FeMo-co) which is thought to contain a nitrogen atom, and the P-cluster containing an [8Fe-7S] cluster. The Fe protein contains a [4Fe-4S] cubane cluster. Nitrogenase is very biologically important because it reduces inert dinitrogen into a form which organisms can use in synthesis. Only a small subset of organisms can catalyse this reaction while all organisms require reduced nitrogen. This reaction is of industrial interest because enzymatic nitrogen fixation occurs under very mild conditions, while the industrial Haber-Bosch process must be run at high temperatures and pressures. It should be noted that the mechanism of this enzyme is still very unclear and that the exact atoms in the FeMo-cofactor involved are unknown. However, it is known that the Fe2, S2B, Fe6, S3b, Fe7, S5A, Fe3 and S2A make up the reactive face of the cofactor [PMID:17614310]. | Defined by 10 residues: CYS:A-61 [auth A-62]ALA:A-64 [auth A-65]ARG:A-95 [auth A-96]HIS:A-194 [auth A-195]CYS:B-152 [auth B-153]VAL:B-156 [auth B-157]LYS:E-10ASP:E-129LYS:F-15LYS:F-41 | EC: 1.18.6.1 (PDB Primary Data) |