Phytoene desaturase (zeta-carotene-forming) explained

Phytoene desaturase (zeta-carotene-forming)
Ec Number:	1.3.99.29

Phytoene desaturase (zeta-carotene-forming) (CrtIa, 2-step phytoene desaturase (ambiguous), two-step phytoene desaturase (ambiguous)) is an enzyme with systematic name 15-cis-phytoene:acceptor oxidoreductase (zeta-carotene-forming).^[1] This enzyme catalyses the following chemical reaction

15-cis-phytoene + 2 acceptor

\rightleftharpoons all-trans-zeta-carotene + 2 reduced acceptor (overall reaction)

(1a) 15-cis-phytoene + acceptor

\rightleftharpoons all-trans-phytofluene + reduced acceptor

(1b) all-trans-phytofluene + acceptor

\rightleftharpoons all-trans-zeta-carotene + reduced acceptor

The enzyme is involved in carotenoid biosynthesis.

See also

• Phytoene desaturase (lycopene-forming)
• Phytoene desaturase (neurosporene-forming)
• 15-Cis-phytoene desaturase
• Phytoene desaturase (3,4-didehydrolycopene-forming)

Notes and References

1. Iniesta AA, Cervantes M, Murillo FJ . Cooperation of two carotene desaturases in the production of lycopene in Myxococcus xanthus . The FEBS Journal . 274 . 16 . 4306–14 . August 2007 . 17662111 . 10.1111/j.1742-4658.2007.05960.x . free .