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Phytoene desaturase (3,4-didehydrolycopene-forming)

Field	Value
Name	Phytoene desaturase (3,4-didehydrolycopene-forming)
EC_number	1.3.99.30

Phytoene desaturase (3,4-didehydrolycopene-forming) (, 5-step phytoene desaturase, five-step phytoene desaturase, phytoene desaturase (ambiguous), Al-1) is an enzyme with systematic name 15-cis-phytoene:acceptor oxidoreductase (3,4-didehydrolycopene-forming). This enzyme catalyses the following chemical reaction

: 15-cis-phytoene + 5 acceptor \rightleftharpoons all-trans-3,4-didehydrolycopene + 5 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 : (1c) all-trans-zeta-carotene + acceptor \rightleftharpoons all-trans-neurosporene + reduced acceptor : (1d) all-trans-neurosporene + acceptor \rightleftharpoons all-trans-lycopene + reduced acceptor : (1e) all-trans-lycopene + acceptor \rightleftharpoons all-trans-3,4-didehydrolycopene + reduced acceptor

This enzyme is involved in carotenoid biosynthesis.

References

(July 2000). "A single five-step desaturase is involved in the carotenoid biosynthesis pathway to beta-carotene and torulene in Neurospora crassa". Fungal Genetics and Biology.
(November 2008). "Novel apocarotenoid intermediates in Neurospora crassa mutants imply a new biosynthetic reaction sequence leading to neurosporaxanthin formation". Fungal Genetics and Biology.

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ec-1.3.99

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