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chlorophyll(ide) b reductase
Pathways
chlorophyll metabolism (BRENDA)
:= BRENDA, 
:= KEGG, 
:= MetaCyc, 
:= SABIO-RK
:= amino acid sequences 
:= show the reaction diagram
EC Number
Reaction
Pathways
Reaction IDs
Stoichiometry Check
Missing Substrate
Missing Product
Commentary
Remark
chlorophyll b + NADPH = 7-hydroxymethyl chlorophyll a + NADP+
; "show the reaction diagram")
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natural substrates
chlorophyllide-a oxygenase
71-hydroxychlorophyllide a + O2 + NADPH + H+ = chlorophyllide b + 2 H2O + NADP+
; "show the reaction diagram")
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: second step of two-step reaction (see R10080, R08203+R08204)natural substrates
SPONTANEOUS
chlorophyllide a + O2 + NADPH + H+ = 71-hydroxychlorophyllide a + H2O + NADP+
; "show the reaction diagram")
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: first step of two-step reaction (see R10080, R08203+R08204): Chlorophyll b is required for the assembly of stable light-harvesting complexes (LHCs) in the chloroplast of green algae, cyanobacteria and plants|CITS: [10758481][15086960]|. Contains a mononuclear iron centre [15086960]. 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 CPD-7014 [10758481]. Chlorophyll a and protochlorophyllide a are not substrates [10758481].natural substrates
chlorophyllide-a oxygenase
chlorophyllide a + O2 + NADPH + H+ = 71-hydroxychlorophyllide a + H2O + NADP+
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: first step of two-step reaction (see R10080, R08203+R08204): Chlorophyll b is required for the assembly of stable light-harvesting complexes (LHCs) in the chloroplast of green algae, cyanobacteria and plants|CITS: [10758481][15086960]|. Contains a mononuclear iron centre [15086960]. 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 CPD-7014 [10758481]. Chlorophyll a and protochlorophyllide a are not substrates [10758481].natural substrates
chlorophyll synthase
chlorophyllide a + phytyl diphosphate = chlorophyll a + diphosphate
; "show the reaction diagram")
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natural substrates
chlorophyll synthase
chlorophyllide a + geranylgeranyl diphosphate = geranylgeranylchlorophyllide a + diphosphate
incomplete
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C1H3
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natural substrates
131-oxo-magnesium-protoporphyrin IX 13-monomethyl ester + NADPH + H+ + O2 = 3,8-divinyl protochlorophyllide a + NADP+ + 2 H2O
; "show the reaction diagram")
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: last step of three-step reaction (see R10068, R06265+R06266+R06267)natural substrates
magnesium-protoporphyrin IX monomethyl ester (oxidative) cyclase
131-oxo-magnesium-protoporphyrin IX 13-monomethyl ester + NADPH + H+ + O2 = 3,8-divinyl protochlorophyllide a + NADP+ + 2 H2O
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: last step of three-step reaction (see R10068, R06265+R06266+R06267)natural substrates
3,8-divinyl protochlorophyllide a 8-vinyl-reductase (NADPH)
protochlorophyllide a + NADP+ = 3,8-divinyl protochlorophyllide a + NADPH + H+
; "show the reaction diagram")
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natural substrates
magnesium-protoporphyrin IX 13-monomethyl ester + NADPH + H+ + O2 = 131-hydroxy-magnesium-protoporphyrin IX 13-monomethyl ester + NADP+ + H2O
; "show the reaction diagram")
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: first step of three-step reaction (see R10068, R06265+R06266+R06267)natural substrates
magnesium-protoporphyrin IX monomethyl ester (oxidative) cyclase
magnesium-protoporphyrin IX 13-monomethyl ester + NADPH + H+ + O2 = 131-hydroxy-magnesium-protoporphyrin IX 13-monomethyl ester + NADP+ + H2O
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: first step of three-step reaction (see R10068, R06265+R06266+R06267)natural substrates
protochlorophyllide reductase
chlorophyllide a + NADP+ = protochlorophyllide + NADPH + H+
; "show the reaction diagram")
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natural substrates
131-hydroxy-magnesium-protoporphyrin IX 13-monomethyl ester + NADPH + H+ + O2 = 131-oxo-magnesium-protoporphyrin IX 13-monomethyl ester + NADP+ + 2 H2O
; "show the reaction diagram")
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: second step of three-step reaction (see R10068, R06265+R06266+R06267)natural substrates
magnesium-protoporphyrin IX monomethyl ester (oxidative) cyclase
131-hydroxy-magnesium-protoporphyrin IX 13-monomethyl ester + NADPH + H+ + O2 = 131-oxo-magnesium-protoporphyrin IX 13-monomethyl ester + NADP+ + 2 H2O
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: second step of three-step reaction (see R10068, R06265+R06266+R06267)natural substrates
magnesium protoporphyrin IX methyltransferase
S-adenosyl-L-methionine + magnesium protoporphyrin IX = S-adenosyl-L-homocysteine + magnesium protoporphyrin IX 13-methyl ester
; "show the reaction diagram")
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natural substrates
magnesium chelatase
ATP + protoporphyrin IX + Mg2+ + H2O = ADP + phosphate + Mg-protoporphyrin IX + 2 H+
; "show the reaction diagram")
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natural substrates
chlorophyllase
chlorophyll + H2O = phytol + chlorophyllide
; "show the reaction diagram")
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natural substrates
phytol kinase
CTP + phytol = CDP + phytyl phosphate
; "show the reaction diagram")
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natural substrates