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EC 1.14.13.72 Details
EC number
1.14.13.72
Accepted name
methylsterol monooxygenase
Reaction
4,4-dimethyl-5α-cholest-7-en-3β-ol + 3 NAD(P)H + 3 H+ + 3 O2 = 3β-hydroxy-4β-methyl-5α-cholest-7-ene-4α-carboxylate + 3 NAD(P)+ + 4 H2O (overall reaction);;(1a) 4,4-dimethyl-5α-cholest-7-en-3β-ol + NAD(P)H + H+ + O2 = 4β-hydroxymethyl-4α-methyl-5α-cholest-7-en-3β-ol + NAD(P)+ + H2O;;(1b) 4β-hydroxymethyl-4α-methyl-5α-cholest-7-en-3β-ol + NAD(P)H + H+ + O2 = 3β-hydroxy-4β-methyl-5α-cholest-7-ene-4α-carbaldehyde + NAD(P)+ + 2 H2O;;(1c) 3β-hydroxy-4β-methyl-5α-cholest-7-ene-4α-carbaldehyde + NAD(P)H + H+ + O2 = 3β-hydroxy-4β-methyl-5α-cholest-7-ene-4α-carboxylate + NAD(P)+ + H2O
Other name(s)
methylsterol hydroxylase, 4-methylsterol oxidase, 4,4-dimethyl-5α-cholest-7-en-3β-ol,hydrogen-donor:oxygen oxidoreductase (hydroxylating)
Systematic name
4,4-dimethyl-5α-cholest-7-en-3β-ol,NAD(P)H:oxygen oxidoreductase (hydroxylating)
CAS registry number
37256-80-7
Comment
Requires cytochrome b5. Also acts on 4α-methyl-5α-cholest-7-en-3β-ol. The sterol can be based on cycloartenol as well as lanosterol.
History
created 1972 as EC 1.14.99.16, transferred 2002 to EC 1.14.13.72, deleted 2017
EC Tree
1.14.13.45 created 1992, deleted 2003
1.14.17.2 created 1972, deleted 1984