| 2 geranylgeranyl diphosphate→prephytoene diphosphate + diphosphate (EC 2.5.1.148; 2.5.1.32) |
| Psest_0405 |
Phytoene synthase:
prephytoene diphosphate→15-cis-phytoene + diphosphate (EC 2.5.1.32) |
| Psest_0405 |
| 15-cis-phytoene + a plastoquinone→15,9'-di-cis-phytofluene + a plastoquinol (EC 1.3.5.5) |
| No genes |
| 15,9'-di-cis-phytofluene + a plastoquinone→9,15,9'-tri-cis-ζ-carotene + a plastoquinol (EC 1.3.5.5) |
| No genes |
| 9,15,9'-tri-cis-ζ-carotene→9,9'-di-cis-ζ-carotene (spontaneous) (EC 5.2.1.12) |
| No genes |
| 9,9'-di-cis-ζ-carotene + an electron-transfer quinone→7,9,9'-cis-neurosporene + an electron-transfer quinol (EC 1.3.5.6) |
| No genes |
| 7,9,9'-cis-neurosporene + an electron-transfer quinone→prolycopene + an electron-transfer quinol (EC 1.3.5.6) |
| No genes |
| prolycopene→all-trans-lycopene (EC 5.2.1.13) |
| No genes |
| all-trans-lycopene→δ-carotene (EC 5.5.1.18) |
| No genes |
| all-trans-lycopene→γ-carotene (EC 5.5.1.19) |
| Psest_0403 |
| δ-carotene→α-carotene (EC 5.5.1.19) |
| No genes |
| γ-carotene→β-carotene (EC 5.5.1.19) |
| Psest_0403 |
| α-carotene + NADPH + dioxygen + H+→zeinoxanthin + NADP+ + H2O |
| No genes |
| β-carotene + dioxygen + 2 H+ + 2 a reduced ferredoxin [iron-sulfur] cluster→β-cryptoxanthin + 2 an oxidized ferredoxin [iron-sulfur] cluster + H2O (EC 1.14.15.24) |
| Psest_0406 |
| zeinoxanthin + dioxygen + a reduced [NADPH-hemoprotein reductase]→lutein + an oxidized [NADPH-hemoprotein reductase] + H2O (EC 1.14.14.158) |
| No genes |
| β-cryptoxanthin + dioxygen + 2 H+ + 2 a reduced ferredoxin [iron-sulfur] cluster→zeaxanthin + 2 an oxidized ferredoxin [iron-sulfur] cluster + H2O (EC 1.14.15.24) |
| Psest_0406 |
| zeaxanthin + dioxygen + 2 H+ + 2 a reduced ferredoxin [iron-sulfur] cluster→antheraxanthin + 2 an oxidized ferredoxin [iron-sulfur] cluster + H2O (EC 1.14.15.21) |
| No genes |
| antheraxanthin + dioxygen + 2 H+ + 2 a reduced ferredoxin [iron-sulfur] cluster→violaxanthin + 2 an oxidized ferredoxin [iron-sulfur] cluster + H2O (EC 1.14.15.21) |
| No genes |
| antheraxanthin + L-ascorbate→zeaxanthin + dehydroascorbate + H2O (EC 1.23.5.1) |
| No genes |
| violaxanthin + L-ascorbate→antheraxanthin + dehydroascorbate + H2O (EC 1.23.5.1) |
| No genes |
Neoxanthin synthase:
violaxanthin→trans-neoxanthin (EC 5.3.99.9) |
| No genes |
| trans-neoxanthin→9'-cis-neoxanthin |
| No genes |
Links:
Candidate genes for each reaction are identified from best hits to MetaCyc; by matching EC numbers (which are assigned by TIGRFam, SEED, or best hits to KEGG); or by matching SEED roles to KEGG reactions to MetaCyc reactions. See the "Protein" tab of each gene for more information