Inhibitors | Comment | Organism | Structure |
---|---|---|---|
Antimycin | highly reduces the rate of cytochrome c1 | Saccharomyces cerevisiae | |
menaquinol | inhibitory ubiquinol analogue binds to the ubiquinol oxidation site in the bc1 complex, 1 molecule bound per enzyme dimer causes full inhibition, binding is anti-cooperative | Saccharomyces cerevisiae | |
methoxyacrylate stilbene | inhibitory ubiquinol analogue binds to the ubiquinol oxidation site in the bc1 complex, 1 molecule bound per enzyme dimer causes full inhibition, binding is anti-cooperative | Saccharomyces cerevisiae | |
additional information | the rate of cytochrome c1 is highly reduced in absence of ubiquinone | Saccharomyces cerevisiae | |
Myxothiazol | - |
Saccharomyces cerevisiae | |
Stigmatellin | inhibitory ubiquinol analogue binds to the ubiquinol oxidation site in the bc1 complex, 1 molecule bound per enzyme dimer causes full inhibition, binding is anti-cooperative | Saccharomyces cerevisiae |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
additional information | - |
additional information | kinetics of the enzyme complex activity dependent on pH and on the Rieske iron-sulfur protein midpoint potential, thermodynamic profile of the Q cycle | Saccharomyces cerevisiae |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Iron | enzyme complex contains a Rieske Fe-S protein which controls the rate of reduction of the cytochrome b | Saccharomyces cerevisiae |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
ubiquinol-2 + 2 ferricytochrome c | Saccharomyces cerevisiae | ubiquinol oxidation is part of the protonmotive Q cycle mechanism, overview, half-of-the sites mechanism with reciprocal control between high potential and low potential redox components involved in ubiquinol oxidation | ubiquinone-2 + 2 ferrocytochrome c + 2 H+ | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Saccharomyces cerevisiae | - |
- |
- |
Reaction | Comment | Organism | Reaction ID |
---|---|---|---|
quinol + 2 ferricytochrome c = quinone + 2 ferrocytochrome c + 2 H+[side 2] | 2 reaction mechanism variants, a fully active enzyme mechanism and a half-of-the sites mechanism of ubiquinol oxidation, switching between the two variants may regulate the enzyme, Glu272 and His181 are involved | Saccharomyces cerevisiae |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
ubiquinol-2 + 2 ferricytochrome c | - |
Saccharomyces cerevisiae | ubiquinone-2 + 2 ferrocytochrome c + 2 H+ | - |
? | |
ubiquinol-2 + 2 ferricytochrome c | ubiquinol oxidation is part of the protonmotive Q cycle mechanism, overview, half-of-the sites mechanism with reciprocal control between high potential and low potential redox components involved in ubiquinol oxidation | Saccharomyces cerevisiae | ubiquinone-2 + 2 ferrocytochrome c + 2 H+ | - |
? |
Subunits | Comment | Organism |
---|---|---|
dimer | cytochrome bc1 complex, electron transfer complex structure | Saccharomyces cerevisiae |
Synonyms | Comment | Organism |
---|---|---|
cytochrome bc1 complex | - |
Saccharomyces cerevisiae |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7.5 | 8 | - |
Saccharomyces cerevisiae |
Ki Value [mM] | Ki Value maximum [mM] | Inhibitor | Comment | Organism | Structure |
---|---|---|---|---|---|
0.0000025 | 0.000005 | methoxyacrylate stilbene | - |
Saccharomyces cerevisiae |