View source for All-trans-zeta-carotene desaturase

{{Infobox enzyme
| Name       = All-trans-zeta-carotene desaturase
| EC_number  = 1.3.99.26
| CAS_number =
| 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 [[List of enzymes|systematic name]] ''all-trans-zeta-carotene:acceptor oxidoreductase''.<ref>{{cite journal | vauthors = Iniesta AA, Cervantes M, Murillo FJ | title = Cooperation of two carotene desaturases in the production of lycopene in Myxococcus xanthus | journal = The FEBS Journal | volume = 274 | issue = 16 | pages = 4306–14 | date = August 2007 | pmid = 17662111 | doi = 10.1111/j.1742-4658.2007.05960.x | doi-access = free}}</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}}

{{CH-CH oxidoreductases}}
{{Enzymes}}
{{Portal bar|Biology|border=no}}

[[Category:EC 1.3.99]]