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Information on EC 1.14.13.81 - magnesium-protoporphyrin IX monomethyl ester (oxidative) cyclase

for references in articles please use BRENDA:EC1.14.13.81
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IUBMB Comments
Requires Fe(II) for activity. The enzyme participates in the biosynthesis of chlorophyllide a in aerobic organisms. The same transformation is achieved in anaerobic organisms by EC 1.21.98.3, anaerobic magnesium-protoporphyrin IX monomethyl ester cyclase. Some facultative phototrophic bacteria, such as Rubrivivax gelatinosus, possess both enzymes.
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Word Map
The expected taxonomic range for this enzyme is: Bacteria, Eukaryota
Reaction Schemes
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Synonyms
chl27, pempec, xantha-l, mg-protoporphyrin ix monomethyl ester cyclase, mg-protoporphyrin ix monomethyl ester (oxidative) cyclase, sll1214, oscrd1, mg protoporphyrin monomethylester cyclase, mpe-cyclase, magnesium-protoporphyrin ix monomethyl ester cyclase, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
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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(1b)
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131-oxo-magnesium-protoporphyrin IX 13-monomethyl ester + NADPH + H+ + O2 = 3,8-divinyl protochlorophyllide a + NADP+ + 2 H2O
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(1c)
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magnesium-protoporphyrin IX 13-monomethyl ester + 3 NADPH + 3 H+ + 3 O2 = 3,8-divinyl protochlorophyllide a + 3 NADP+ + 5 H2O
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overall reaction
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magnesium-protoporphyrin IX 13-monomethyl ester + NADPH + H+ + O2 = 131-hydroxy-magnesium-protoporphyrin IX 13-monomethyl ester + NADP+ + H2O
show the reaction diagram
(1a)
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