| Pathway Id | ko00130 |
| Class & Sub-Class | Class: Metabolism Sub-Class: Metabolism of cofactors and vitamins |
| Description | Ubiquinone (UQ); also called coenzyme Q; and plastoquinone (PQ) are electron carriers in oxidative phosphorylation and photosynthesis; respectively. The quinoid nucleus of ubiquinone is derived from the shikimate pathway; 4-hydroxybenzoate is directly formed from chorismate in bacteria; while it can be formed from either chorismate or tyrosine in yeast. The following biosynthesis of terpenoid moiety involves reactions of prenylation; decarboxylation; and three hydroxylations alternating with three methylations. The order of these reactions are somewhat different between bacteria and yeast. Phylloquinone (vitamin K1); menaquinone (vitamin K2); and tocopherol (vitamin E) are fat-soluble vitamins. Phylloquinone is a compound present in all photosynthetic plants serving as a cofactor for photosystem I-mediated electron transport. Menaquinone is an obligatory component of the electron-transfer pathway in bacteria. Source: KEGG Database |
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