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Literature summary for 7.1.1.6 extracted from
- Comparative aspects of quinol-cytochrome c/plastocyanin oxidoreductases (1983), Biochim. Biophys. Acta, 726, 97-133.
Inhibitors
| Inhibitors | Comment | Organism | Structure |
|---|---|---|---|
| 2,5-dibromo-3-methyl-6-isopropylbenzoquinone | - |
Spinacia oleracea |  |
| 2,5-dibromo-3-methyl-6-isopropylbenzoquinone | - |
Trichormus variabilis | |
| 2-Iodo-6-isopropyl-3-methyl-2',2,4'-trinitrodiphenyl ether | - |
Spinacia oleracea | |
| 2-Iodo-6-isopropyl-3-methyl-2',2,4'-trinitrodiphenyl ether | - |
Trichormus variabilis | |
| 5-(n-undecyl)-6-hydroxy-4,7-dioxobenzothiazole | - |
Spinacia oleracea | |
| 5-(n-undecyl)-6-hydroxy-4,7-dioxobenzothiazole | - |
Trichormus variabilis | |
| additional information | overview | Spinacia oleracea | |
| additional information | overview | Trichormus variabilis |
Molecular Weight [Da]
| Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
|---|---|---|---|
| 142000 | - |
calculation from cytochrome f content | Spinacia oleracea |
| 160000 | - |
calculation from ultraviolet spectrum assuming subunit stoichiometry of 1:2:1:2 | Spinacia oleracea |
| 185000 | - |
gel filtration | Spinacia oleracea |
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Spinacia oleracea | - |
- |
- |
| Trichormus variabilis | - |
- |
- |
Reaction
| Reaction | Comment | Organism | Reaction ID |
|---|---|---|---|
| plastoquinol + 2 oxidized plastocyanin + 2 H+[side 1] = plastoquinone + 2 reduced plastocyanin + 4 H+[side 2] | mechanism | Spinacia oleracea |
Renatured (Commentary)
| Renatured (Comment) | Organism |
|---|---|
| enzyme reacts with purified photosystem I reaction centers in the micellar state if plastocyanin is present | Spinacia oleracea |
| reconstitution into lipid vesicles | Spinacia oleracea |
| reconstitution into lipid vesicles | Trichormus variabilis |
Source Tissue
| Source Tissue | Comment | Organism | Textmining |
|---|---|---|---|
| leaf | - |
Spinacia oleracea | - |
Substrates and Products (Substrate)
| Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| plastoquinol + cytochrome c1 | - |
Trichormus variabilis | plastoquinone + reduced cytochrome c1 | - |
? | |
| plastoquinol + plastocyanin | - |
Trichormus variabilis | plastoquinone + reduced plastocyanin | - |
? | |
| plastoquinol + plastocyanin | enzyme also reduces algal cytochrome c | Spinacia oleracea | plastoquinone + reduced plastocyanin | - |
? | |
Subunits
| Subunits | Comment | Organism |
|---|---|---|
| More | complex consists of the following polypeptides: cytochrome f MW 31000, cytochrome b6 MW 22000, Rieske FeS protein MW 22000, and a polypeptide with the molecular weight of 16000, SDS-PAGE | Trichormus variabilis |
| More | complex consists of the following polypeptides: cytochrome f MW 33000, cytochrome b6 MW 23000, Rieske FeS protein MW 20000, and a polypeptide with the molecular weight of 17000, SDS-PAGE | Spinacia oleracea |
| More | ratio cytochrome b563:cytochrome f:Rieske Fe-S protein 2:1:1 | Trichormus variabilis |
Turnover Number [1/s]
| Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
|---|---|---|---|---|---|
| additional information | - |
additional information | - |
Spinacia oleracea | |
| additional information | - |
additional information | - |
Trichormus variabilis | |
| 0.333 | - |
cytochrome c1 | - |
Trichormus variabilis | |
pH Optimum
| pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
|---|---|---|---|
| 8 | - |
- |
Spinacia oleracea |
| 8 | - |
- |
Trichormus variabilis |
Cofactor
| Cofactor | Comment | Organism | Structure |
|---|---|---|---|
| heme | - |
Spinacia oleracea | |
| heme | two heme-carrying polypeptides per enzyme | Trichormus variabilis | |
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Release 2023.1 (January 2023)
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