Chlorophyllide-a oxygenase

Template:Short description Template:Infobox enzyme Chlorophyllide-a oxygenase (Template:EC number), chlorophyllide a oxygenase, chlorophyll-b synthase, CAO) is an enzyme with systematic name chlorophyllide-a:oxygen 7-oxidoreductase. This enzyme catalyses the following chemical reactions

(1) chlorophyllide a + O₂ + NADPH + H⁺ $\rightleftharpoons$ 7-hydroxychlorophyllide a + H₂O + NADP⁺

(2) 7-hydroxychlorophyllide a + O₂ + NADPH + H⁺ $\rightleftharpoons$ chlorophyllide b + 2 H₂O + NADP⁺

Chlorophyllide a, (R=H) is converted to chlorophyllide b, in which the methyl group show in the green box is oxidised to a formyl group.

This enzyme contains a mononuclear iron centre and is part of the biosynthetic pathway to chlorophylls.

See also

• Biosynthesis of chlorophylls

External links

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