View source for 9,9'-Dicis-zeta-carotene desaturase

{{Infobox enzyme
| Name = All-trans-zeta-carotene desaturase
| EC_number = 1.3.99.26
| CAS_number = 
| IUBMB_EC_number = 1/3/99/26
| GO_code = 
| image = 
| width = 
| caption =
}}
'''All-trans-zeta-carotene desaturase''' ({{EC number|1.3.99.26}}, ''Crtlb'', ''phytoene desaturase (ambiguous)'', ''2-step phytoene desaturase (ambiguous)'', ''two-step phytoene desaturase (ambiguous)'', ''CrtI (ambiguous)'') is an [[enzyme]] with system name ''all-trans-zeta-carotene:acceptor oxidoreductase''.<ref>{{cite journal | title = Cooperation of two carotene desaturases in the production of lycopene in <em>Myxococcus xanthus</em> |author = Iniesta, A.A., Cervantes, M. and Murillo, F.J. |journal = FEBS J. |year = 2007 |volume = 274 |pages = 4306–4314 |pmid = 17662111 |doi=10.1111/j.1742-4658.2007.05960.x |issue=16}}</ref> This enzyme [[catalysis|catalyses]] the following [[chemical reaction]]

: [[zeta-Carotene|all-''trans''-''zeta''-carotene]] + 2 acceptor <math>\rightleftharpoons</math> [[lycopene|all-''trans''-lycopene]] + 2 reduced acceptor (overall reaction)
: (1a) all-''trans''-''zeta''-carotene + acceptor <math>\rightleftharpoons</math> [[neurosporene|all-''trans''-neurosporene]] + reduced acceptor
: (1b) all-''trans''-neurosporene + acceptor <math>\rightleftharpoons</math> all-''trans''-lycopene + reduced acceptor

This enzyme is involved in [[carotenoid]] biosynthesis.

== References ==
{{reflist}}

== External links ==
* {{MeshName|All-trans-zeta-carotene+desaturase}}

[[Category:EC 1.3.99]]