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Literature summary for 1.18.1.2 extracted from
- Plastoquinones are effectively reduced by ferredoxin:NADP+ oxidoreductase in the presence of sodium cholate micelles. Significance for cyclic electron transport and chlororespiration (2003), Phytochemistry, 64, 1055-1060.
Activating Compound
| Activating Compound | Comment | Organism | Structure |
|---|---|---|---|
| Ferredoxin | highly stimulates NADPH oxidation | Spinacia oleracea | |
| sodium cholate | stimulated NADPH oxidation, especially in presence of plastoquinone substrate | Spinacia oleracea |  |
Inhibitors
| Inhibitors | Comment | Organism | Structure |
|---|---|---|---|
| Mg2+ | inhibits reduction of plastoquinone incorporated into sodium cholate micelles | Spinacia oleracea | |
| myristyltrimethylammonium bromide | inhibits reduction of plastoquinone almost completely at 15 mM | Spinacia oleracea | |
| octylglucoside | inhibits reduction of plastoquinone | Spinacia oleracea | |
| SDS | inhibits reduction of plastoquinone almost completely at 15 mM | Spinacia oleracea | |
| Triton X-100 | inhibits reduction of plastoquinone | Spinacia oleracea | |
Localization
| Localization | Comment | Organism | GeneOntology No. | Textmining |
|---|---|---|---|---|
| thylakoid membrane | - |
Spinacia oleracea | 42651 | - |
Natural Substrates/ Products (Substrates)
| Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| additional information | Spinacia oleracea | enzyme is involved in cyclic electron transport and chlororespiration | ? | - |
? | |
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Spinacia oleracea | - |
- |
- |
Substrates and Products (Substrate)
| Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| additional information | enzyme is involved in cyclic electron transport and chlororespiration | Spinacia oleracea | ? | - |
? | |
| plastoquinone + NADPH | plastoquinones with different length of side chains from spinach, preference for short chain substrate, reaction proceeds via a FMN and a semiquinone intermediate, incorporation of the substrate into sodium cholate micelles is required for activity, micelles structure scheme | Spinacia oleracea | ? + NADP+ | - |
? | |
Cofactor
| Cofactor | Comment | Organism | Structure |
|---|---|---|---|
| FMN | - |
Spinacia oleracea | |
| NADPH | - |
Spinacia oleracea | |
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Release 2023.1 (January 2023)
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