Chlorophyllide-a oxygenase

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Chlorophyllide-a oxygenase
Identifiers
EC no.1.14.13.122
CAS no.216503-73-0
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
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NCBIproteins

Chlorophyllide-a oxygenase (EC 1.14.13.122), chlorophyllide a oxygenase, chlorophyll-b synthase, CAO) is an enzyme with systematic name chlorophyllide-a:oxygen 7-oxidoreductase.[1][2][3][4] This enzyme catalyses the following chemical reactions

(1) chlorophyllide a + O2 + NADPH + H+ 7-hydroxychlorophyllide a + H2O + NADP+
(2) 7-hydroxychlorophyllide a + O2 + NADPH + H+ chlorophyllide b + 2 H2O + NADP+
File:C-3 position Chlorophyll a.svg
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.[5][6]

See also

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References

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