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5.5.1.19: lycopene beta-cyclase

This is an abbreviated version!
For detailed information about lycopene beta-cyclase, go to the full flat file.

Word Map on EC 5.5.1.19

Reaction

carotenoid psi-end group
=
carotenoid beta-end group

Synonyms

beta-LCY, beta-LCY1, capsanthin-capsorubin synthase, CCS, chromoplast-specific lycopene beta cyclase, CrtL, CrtL-b, CrtL-e, CrtY, crtYB, CruA, CruP, CYC-B, DcLCYB1, LCY, LCY-B, LCY-beta, LCYb, LCYb1, LCYB2, LCYb3, LCYb4, LYCB, lycopene beta cyclase, lycopene beta-cyclase 1, lycopene cyclase, phytoene synthase/lycopene cyclase, SSO2904

ECTree

     5 Isomerases
         5.5 Intramolecular lyases
             5.5.1 Intramolecular lyases (only sub-subclass identified to date)
                5.5.1.19 lycopene beta-cyclase

Systematic Name

Systematic Name on EC 5.5.1.19 - lycopene beta-cyclase

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SYSTEMATIC NAME
IUBMB Comments
carotenoid beta-end group lyase (decyclizing)
The enzyme is a non-redox flavoprotein, containing FADH2 that is used for stabilization of a transition state. Lycopene has a psi-end group at both ends. When acting on one end, the enzyme forms gamma-carotene. When acting on both ends it forms beta-carotene. It also acts on neurosporene to give beta-zeacarotene.