Q09158 · NIFH_DESMC
- ProteinNitrogenase iron protein
- GenenifH
- StatusUniProtKB reviewed (Swiss-Prot)
- Amino acids108 (go to sequence)
- Protein existenceInferred from homology
- Annotation score3/5
Function
function
The key enzymatic reactions in nitrogen fixation are catalyzed by the nitrogenase complex, which has 2 components: the iron protein and the molybdenum-iron protein.
Catalytic activity
- 16 ATP + 16 H2O + N2 + 8 reduced [2Fe-2S]-[ferredoxin] = 16 ADP + 6 H+ + H2 + 2 NH4+ + 8 oxidized [2Fe-2S]-[ferredoxin] + 16 phosphate
16 CHEBI:30616 + 16 CHEBI:15377 + CHEBI:17997 + 8 RHEA-COMP:10001 = 16 CHEBI:456216 + 6 CHEBI:15378 + CHEBI:18276 + 2 CHEBI:28938 + 8 RHEA-COMP:10000 + 16 CHEBI:43474
Cofactor
Note: Binds 1 [4Fe-4S] cluster per dimer.
Features
Showing features for binding site.
GO annotations
Aspect | Term | |
---|---|---|
Molecular Function | 4 iron, 4 sulfur cluster binding | |
Molecular Function | ATP binding | |
Molecular Function | carbonyl sulfide nitrogenase activity | |
Molecular Function | metal ion binding | |
Molecular Function | nitrogenase activity | |
Biological Process | nitrogen fixation |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended nameNitrogenase iron protein
- EC number
- Alternative names
Gene names
Organism names
- Strain
- Taxonomic lineageBacteria > Cyanobacteriota > Cyanophyceae > Nostocales > Nostocaceae > Desmonostoc
Accessions
- Primary accessionQ09158
PTM/Processing
Features
Showing features for chain.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Chain | PRO_0000139515 | 1-108 | Nitrogenase iron protein | |||
Sequence: STRLMLHSKAQTSVLQLAAERGAVEDIELHEVMLTGFRDVRCVESGGPEPGVGCAGRGIITAINFLEENGAYTDVDFVSYDVLGDVVCGGFAMPIREGKAQEIYIVTS |
Interaction
Subunit
Homodimer.
Structure
Sequence
- Sequence statusFragment
- Length108
- Mass (Da)11,550
- Last updated1996-10-01 v1
- ChecksumF6DA6709F7CC1987
Features
Showing features for non-terminal residue.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Non-terminal residue | 1 | |||||
Sequence: S | ||||||
Non-terminal residue | 108 | |||||
Sequence: S |