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Information on EC 1.14.18.9 - methylsterol monooxygenase

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IUBMB Comments
Requires cytochrome b5. Also acts on 4alpha-methyl-5alpha-cholest-7-en-3beta-ol. The sterol can be based on cycloartenol as well as lanosterol.
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Word Map
The enzyme appears in viruses and cellular organisms
Synonyms
erg25, sc4mol, methyl sterol oxidase, erg25p, 4-methyl sterol oxidase, smo2-1, c-4 sterol methyl oxidase, smo2-2, smo1-2, smo1-1, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
3beta-hydroxy-4beta-methyl-5alpha-cholest-7-ene-4alpha-carbaldehyde + 2 ferrocytochrome b5 + O2 + 2 H+ = 3beta-hydroxy-4beta-methyl-5alpha-cholest-7-ene-4alpha-carboxylate + 2 ferricytochrome b5 + H2O
show the reaction diagram
(1c)
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4,4-dimethyl-5alpha-cholest-7-en-3beta-ol + 2 ferrocytochrome b5 + O2 + 2 H+ = 4beta-hydroxymethyl-4alpha-methyl-5alpha-cholest-7-en-3beta-ol + 2 ferricytochrome b5 + H2O
show the reaction diagram
(1a)
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4,4-dimethyl-5alpha-cholest-7-en-3beta-ol + 6 ferrocytochrome b5 + 3 O2 + 6 H+ = 3beta-hydroxy-4beta-methyl-5alpha-cholest-7-ene-4alpha-carboxylate + 6 ferricytochrome b5 + 4 H2O
show the reaction diagram
4beta-hydroxymethyl-4alpha-methyl-5alpha-cholest-7-en-3beta-ol + 2 ferrocytochrome b5 + O2 + 2 H+ = 3beta-hydroxy-4beta-methyl-5alpha-cholest-7-ene-4alpha-carbaldehyde + 2 ferricytochrome b5 + 2 H2O
show the reaction diagram
(1b)
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