The Enzyme Database

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Accepted name: capsanthin/capsorubin synthase
Reaction: (1) violaxanthin = capsorubin
(2) antheraxanthin = capsanthin
For diagram of the biosynthesis of capsanthin, capsarubin and neoxanthin, click here and for diagram of carotenoid epoxide rearrangements, click here
Other name(s): CCS; ketoxanthophyll synthase; capsanthin-capsorubin synthase
Systematic name: violaxanthin—capsorubin isomerase (ketone-forming)
Comments: This multifunctional enzyme is induced during chromoplast differentiation in plants [1]. Isomerization of the epoxide ring of violaxanthin gives the cyclopentyl-ketone of capsorubin or capsanthin.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 162032-85-1
[EC created 2005]

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