Activating Compound | Comment | Organism | Structure |
---|---|---|---|
additional information | H2 generation activates N2 binding | Azotobacter vinelandii |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
Acetylene | noncompetitive inhibition of N2 reduction | Azotobacter vinelandii | |
CO | - |
Azotobacter vinelandii | |
H2 | competitive inhibition of N2 binding | Azotobacter vinelandii | |
N2 | competitive inhibition of acetylene reduction | Azotobacter vinelandii |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Iron | enzyme contains a [7Fe9S-Mo-X-homocitrate] metallocluster, 1 of 2 different models proposes one or more Fe atoms in the Mo cofactor to be responsible for substrate binding | Azotobacter vinelandii | |
Molybdenum | enzyme contains a [7Fe9S-Mo-X-homocitrate] metallocluster, where X can be an N atom, 1 of 2 different models proposes molydenum as the substrate binding partner in the active site | Azotobacter vinelandii |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
reduced ferredoxin + H+ + N2 + ATP + H2O | Azotobacter vinelandii | biological nitrogen fixation | oxidized ferredoxin + H2 + NH3 + ADP + phosphate | - |
ir |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Azotobacter vinelandii | - |
molybdenum-dependent enzyme variant | - |
Reaction | Comment | Organism | Reaction ID |
---|---|---|---|
4 reduced ferredoxin + 8 H+ + N2 + 16 ATP + 16 H2O = 4 oxidized ferredoxin + H2 + 2 NH3 + 16 ADP + 16 phosphate | theoretical mechanisms of substrate binding to molybdenum or iron in the FeMo cofactor, modeling | Azotobacter vinelandii |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
acetylene + ? | - |
Azotobacter vinelandii | ethylene + ? | - |
? | |
reduced ferredoxin + H+ + N2 + ATP + H2O | biological nitrogen fixation | Azotobacter vinelandii | oxidized ferredoxin + H2 + NH3 + ADP + phosphate | - |
ir | |
reduced ferredoxin + H+ + N2 + ATP + H2O | in absence of N2 or other substrates, the electron flow is directed towards proton reduction | Azotobacter vinelandii | oxidized ferredoxin + H2 + NH3 + ADP + phosphate | - |
ir |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
ATP | - |
Azotobacter vinelandii | |
Ferredoxin | - |
Azotobacter vinelandii | |
iron-molybdenum cofactor | enzyme contains a [7Fe9S-Mo-X-homocitrate] metallocluster, structure, redox status, part of the MoFe protein | Azotobacter vinelandii |