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Information on EC 1.14.18.9 - 4alpha-methylsterol monooxygenase and Organism(s) Arabidopsis thaliana

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EC Tree
IUBMB Comments
This enzyme is found in fungi and animals and catalyses a step in the biosynthesis of important sterol molecules such as ergosterol and cholesterol, respectively. The enzyme acts on the 4alpha-methyl group. Subsequent decarboxylation by EC 1.1.1.170, 3beta-hydroxysteroid-4alpha-carboxylate 3-dehydrogenase (decarboxylating), occurs concomitantly with epimerization of the remaining 4beta-methyl into the 4alpha position, thus making it a suitable substrate for a second round of catalysis. cf. EC 1.14.13.246, 4beta-methylsterol monooxygenase; EC 1.14.18.10, plant 4,4-dimethylsterol C-4alpha-methyl-monooxygenase; and EC 1.14.18.11, plant 4alpha-monomethylsterol monooxygenase.
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Arabidopsis thaliana
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Word Map
The taxonomic range for the selected organisms is: Arabidopsis thaliana
The expected taxonomic range for this enzyme is: Eukaryota, Bacteria
Synonyms
erg25, sc4mol, methyl sterol oxidase, erg25p, c-4 sterol methyl oxidase, 4-methyl sterol oxidase, c-4 methyl sterol oxidase, sterol c4 methyl oxidase, sterol-c4-methyl oxidase, 4,4-dimethyl-zymosterol 4alpha-methyl-oxidase, more
SYNONYM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
4-methylsterol oxidase
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methylsterol hydroxylase
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methylsterol monooxygenase
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REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
oxidation
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redox reaction
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reduction
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PATHWAY SOURCE
PATHWAYS
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-, -, -, -
SYSTEMATIC NAME
IUBMB Comments
4,4-dimethyl-5alpha-cholest-7-en-3beta-ol,ferrocytochrome-b5:oxygen oxidoreductase (C4alpha-methyl-hydroxylating)
This enzyme is found in fungi and animals and catalyses a step in the biosynthesis of important sterol molecules such as ergosterol and cholesterol, respectively. The enzyme acts on the 4alpha-methyl group. Subsequent decarboxylation by EC 1.1.1.170, 3beta-hydroxysteroid-4alpha-carboxylate 3-dehydrogenase (decarboxylating), occurs concomitantly with epimerization of the remaining 4beta-methyl into the 4alpha position, thus making it a suitable substrate for a second round of catalysis. cf. EC 1.14.13.246, 4beta-methylsterol monooxygenase; EC 1.14.18.10, plant 4,4-dimethylsterol C-4alpha-methyl-monooxygenase; and EC 1.14.18.11, plant 4alpha-monomethylsterol monooxygenase.
CAS REGISTRY NUMBER
COMMENTARY hide
37256-80-7
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UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
SEQUENCE
LOCALIZATION PREDICTION?
SMO13_ARATH
291
3
34284
Swiss-Prot
other Location (Reliability: 2)
SMO21_ARATH
272
4
31649
Swiss-Prot
other Location (Reliability: 5)
SMO22_ARATH
266
4
30927
Swiss-Prot
Secretory Pathway (Reliability: 5)
SMO11_ARATH
298
4
34647
Swiss-Prot
other Location (Reliability: 2)
SMO12_ARATH
299
2
34989
Swiss-Prot
other Location (Reliability: 2)