Information on EC 1.13.12.14 - chlorophyllide-a oxygenase

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EC Tree 1 Oxidoreductases 1.13 Acting on single donors with incorporation of molecular oxygen (oxygenases) 1.13.12 With incorporation of one atom of oxygen (internal monooxygenases or internal mixed-function oxidases) 1.13.12.14 chlorophyllide-a oxygenase

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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Release 2026.1 (March 2026)