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Literature summary for 1.14.15.21 extracted from
- Xanthophyll cycle enzymes are members of the lipocalin family, the first identified from plants (1998), J. Biol. Chem., 273, 15321-15324.
Natural Substrates/ Products (Substrates)
| Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| antheraxanthin + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ + O2 | Arabidopsis thaliana | the enzyme catalyzes the removal of epoxide groups in carotenoides of xanthophyll cycle in plants | violaxanthin + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O | - |
? |  |
| zeaxanthin + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ + O2 | Arabidopsis thaliana | the enzyme catalyzes the removal of epoxide groups in carotenoides of xanthophyll cycle in plants | antheraxanthin + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O | - |
? | |
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Arabidopsis thaliana | - |
- |
- |
Substrates and Products (Substrate)
| Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| antheraxanthin + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ + O2 | the enzyme catalyzes the removal of epoxide groups in carotenoides of xanthophyll cycle in plants | Arabidopsis thaliana | violaxanthin + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O | - |
? | |
| zeaxanthin + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ + O2 | the enzyme catalyzes the removal of epoxide groups in carotenoides of xanthophyll cycle in plants | Arabidopsis thaliana | antheraxanthin + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O | - |
? | |
Subunits
| Subunits | Comment | Organism |
|---|---|---|
| More | sequence analysis establishes the enzyme as a member of the lipocalin family of proteins, a diverse group of proteins that bind small hydrophobic molecules and share a conserved tertiary structure of eight beta-strands forming a barrel configuration | Arabidopsis thaliana |
Cofactor
| Cofactor | Comment | Organism | Structure |
|---|---|---|---|
| NAD(P)H | - |
Arabidopsis thaliana | |
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Release 2023.1 (January 2023)
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