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Information on EC - chlorophyllide-a oxygenase

for references in articles please use BRENDA:EC1.14.13.122
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IUBMB Comments
Chlorophyll b is required for the assembly of stable light-harvesting complexes (LHCs) in the chloroplast of green algae, cyanobacteria and plants [2,3]. Contains a mononuclear iron centre . The enzyme catalyses two successive hydroxylations at the 7-methyl group of chlorophyllide a. The second step yields the aldehyde hydrate, which loses H2O spontaneously to form chlorophyllide b . Chlorophyll a and protochlorophyllide a are not substrates .
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The expected taxonomic range for this enzyme is: Bacteria, Eukaryota
Reaction Schemes
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chlorophyllide a oxygenase, oscao1, chlorophyll a oxygenase, chlorophyllide a oxygenase 1, chlorophyll a oxygenase/chlorophyll b synthase, more
71-hydroxychlorophyllide a + O2 + NADPH + H+ = chlorophyllide b + 2 H2O + NADP+
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chlorophyllide a + 2 O2 + 2 NADPH + 2 H+ = chlorophyllide b + 3 H2O + 2 NADP+
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chlorophyllide a + O2 + NADPH + H+ = 71-hydroxychlorophyllide a + H2O + NADP+
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