All-trans-zeta-carotene desaturase

Template:Infobox enzyme All-trans-zeta-carotene desaturase (Template:EC number, Crtlb, phytoene desaturase (ambiguous), 2-step phytoene desaturase (ambiguous), two-step phytoene desaturase (ambiguous), CrtI (ambiguous)) is an enzyme with systematic name all-trans-zeta-carotene:acceptor oxidoreductase. This enzyme catalyses the following chemical reaction

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

(1a) all-trans-zeta-carotene + acceptor $\rightleftharpoons$ all-trans-neurosporene + reduced acceptor

(1b) all-trans-neurosporene + acceptor $\rightleftharpoons$ all-trans-lycopene + reduced acceptor

This enzyme is involved in carotenoid biosynthesis.

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