View source for Lycopene epsilon-cyclase

{{Infobox enzyme
| Name       = Lycopene ε-cyclase
| EC_number  = 5.5.1.18
| CAS_number =
| GO_code    = 
| image      = 
| width      = 
| caption    =  
}}
'''Lycopene ε-cyclase''' ({{EnzExplorer|5.5.1.18}}, ''CrtL-e'', ''LCYe'') is an [[enzyme]] with [[List of enzymes|systematic name]] ''carotenoid psi-end group lyase (decyclizing)''.<ref>{{cite journal | vauthors = Cunningham FX, Gantt E | title = One ring or two? Determination of ring number in carotenoids by lycopene epsilon-cyclases | journal = Proceedings of the National Academy of Sciences of the United States of America | volume = 98 | issue = 5 | pages = 2905–10 | date = February 2001 | pmid = 11226339 | pmc = 30238 | doi = 10.1073/pnas.051618398 | doi-access = free }}</ref><ref>{{cite journal | vauthors = Stickforth P, Steiger S, Hess WR, Sandmann G | title = A novel type of lycopene epsilon-cyclase in the marine cyanobacterium Prochlorococcus marinus MED4 | journal = Archives of Microbiology | volume = 179 | issue = 6 | pages = 409–15 | date = June 2003 | pmid = 12712234 | doi = 10.1007/s00203-003-0545-4 | s2cid = 35630901 }}</ref> This enzyme [[catalysis|catalyses]] the following [[chemical reaction]]

[[File:Lycopene ε-cyclase.svg|320px|center]]

<small>carotenoid psi-end group <math>\rightleftharpoons</math> carotenoid epsilon-end group</small>

The [[carotenoid]] [[lycopene]] has the psi-end group at both ends.

[[File:Lycopene ε-cyclase2.svg|600px|center]]

== References ==
{{reflist}}

== External links ==
* {{MeshName|Lycopene+epsilon-cyclase}}

{{Intramolecular Lyases}}
{{Enzymes}}
{{Portal bar|Biology|border=no}}

[[Category:EC 5.5.1]]