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EC 1.3.99.28 Details
EC number
1.3.99.28
Accepted name
phytoene desaturase (neurosporene-forming)
Reaction
15-cis-phytoene + 3 acceptor = all-trans-neurosporene + 3 reduced acceptor (overall reaction);;(1a) 15-cis-phytoene + acceptor = all-trans-phytofluene + reduced acceptor;;(1b) all-trans-phytofluene + acceptor = all-trans-ζ-carotene + reduced acceptor;;(1c) all-trans-ζ-carotene + acceptor = all-trans-neurosporene + reduced acceptor
Other name(s)
3-step phytoene desaturase, three-step phytoene desaturase, phytoene desaturase (ambiguous), CrtI (ambiguous)
Systematic name
15-cis-phytoene:acceptor oxidoreductase (neurosporene-forming)
Comment
This enzyme is involved in carotenoid biosynthesis and catalyses up to three desaturation steps (cf. EC 1.3.99.29 [phytoene desaturase (ζ-carotene-forming)], EC 1.3.99.30 [phytoene desaturase (3,4-didehydrolycopene-forming)], EC 1.3.99.31 [phytoene desaturase (lycopene-forming)]). The enzyme is activated by FAD. NAD+, NADP+ or ATP show no activating effect [1].
History
created 2011
EC Tree
1.3.99.9 created 1976, deleted 2002