Beta-carotene 3-hydroxylase (, ''beta-carotene 3,3'-monooxygenase'', ''CrtZ'') is an
enzyme with
systematic name ''beta-carotene,NADH:oxygen 3-oxidoreductase ''.
This enzyme
catalyses the following
chemical reaction
:
beta-carotene + 2 NADH + 2 H
+ + 2 O
2 zeaxanthin + 2 NAD
+ + 2 H
2O (overall reaction)
:(1a) beta-carotene + NADH + H
+ + O
2 beta-cryptoxanthin + NAD
+ + H
2O
:(1b) beta-cryptoxanthin + NADH + H
+ + O
2 zeaxanthin + NAD
+ + H
2O
Beta-carotene 3-hydroxylase requires
ferredoxin
Ferredoxins (from Latin ''ferrum'': iron + redox, often abbreviated "fd") are iron–sulfur proteins that mediate electron transfer in a range of metabolic reactions. The term "ferredoxin" was coined by D.C. Wharton of the DuPont Co. and applied t ...
and Fe(II).
References
External links
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EC 1.14.13