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UniProtKB - Q4R4Q4 (MSMO1_MACFA)
Protein
Methylsterol monooxygenase 1
Gene
MSMO1
Organism
Macaca fascicularis (Crab-eating macaque) (Cynomolgus monkey)
Status
Functioni
Catalyzes the three-step monooxygenation required for the demethylation of 4,4-dimethyl and 4alpha-methylsterols, which can be subsequently metabolized to cholesterol.
By similarityCatalytic activityi
- 4,4-dimethyl-5α-cholest-7-en-3β-ol + 6 Fe(II)-[cytochrome b5] + 5 H+ + 3 O2 = 4α-carboxy-4β-methyl-5α-cholest-7-ene-3β-ol + 6 Fe(III)-[cytochrome b5] + 4 H2OBy similarityEC:1.14.18.9By similarityThis reaction proceeds in the forwardBy similarity direction.
- 4,4-dimethyl-5α-cholesta-8,24-dien-3β-ol + 6 Fe(II)-[cytochrome b5] + 5 H+ + 3 O2 = 4β-methylzymosterol-4α-carboxylate + 6 Fe(III)-[cytochrome b5] + 4 H2OBy similarityThis reaction proceeds in the forwardBy similarity direction.
- 4α-methylzymosterol + 6 Fe(II)-[cytochrome b5] + 5 H+ + 3 O2 = 4α-carboxyzymosterol + 6 Fe(III)-[cytochrome b5] + 4 H2OBy similarityThis reaction proceeds in the forwardBy similarity direction.
- 4α-methyl-5α-cholest-7-en-3β-ol + 6 Fe(II)-[cytochrome b5] + 5 H+ + 3 O2 = 4α-carboxy-5α-cholest-7-en-3β-ol + 6 Fe(III)-[cytochrome b5] + 4 H2OBy similarityThis reaction proceeds in the forwardBy similarity direction.
- 4,4-dimethyl-5α-cholest-8-en-3β-ol + 6 Fe(II)-[cytochrome b5] + 5 H+ + 3 O2 = 4α-carboxy-4β-methyl-5α-cholest-8-en-3β-ol + 6 Fe(III)-[cytochrome b5] + 4 H2OBy similarityThis reaction proceeds in the forwardBy similarity direction.
- 4α-methyl-5α-cholest-8-en-3β-ol + 6 Fe(II)-[cytochrome b5] + 5 H+ + 3 O2 = 4α-carboxy-5α-cholest-8-ene-3β-ol + 6 Fe(III)-[cytochrome b5] + 4 H2OBy similarityThis reaction proceeds in the forwardBy similarity direction.
Cofactori
Fe cationBy similarity
: zymosterol biosynthesis Pathwayi
This protein is involved in step 3 of the subpathway that synthesizes zymosterol from lanosterol.By similarity This subpathway is part of the pathway zymosterol biosynthesis, which is itself part of Steroid biosynthesis.View all proteins of this organism that are known to be involved in the subpathway that synthesizes zymosterol from lanosterol, the pathway zymosterol biosynthesis and in Steroid biosynthesis.
Pathwayi: cholesterol biosynthesis
This protein is involved in the pathway cholesterol biosynthesis, which is part of Steroid biosynthesis.By similarityView all proteins of this organism that are known to be involved in the pathway cholesterol biosynthesis and in Steroid biosynthesis.
GO - Molecular functioni
- C-4 methylsterol oxidase activity Source: UniProtKB-EC
- iron ion binding Source: InterPro
GO - Biological processi
- cholesterol biosynthetic process Source: UniProtKB-UniPathway
Keywordsi
Molecular function | Oxidoreductase |
Biological process | Cholesterol biosynthesis, Cholesterol metabolism, Lipid biosynthesis, Lipid metabolism, Steroid biosynthesis, Steroid metabolism, Sterol biosynthesis, Sterol metabolism |
Ligand | Iron, NAD |
Enzyme and pathway databases
UniPathwayi | UPA00063 UPA00770;UER00756 |
Names & Taxonomyi
Protein namesi | Recommended name: Methylsterol monooxygenase 1 (EC:1.14.18.9By similarity)Alternative name(s): C-4 methylsterol oxidase Sterol-C4-methyl oxidase |
Gene namesi | Name:MSMO1 Synonyms:SC4MOL ORF Names:QtrA-11285 |
Organismi | Macaca fascicularis (Crab-eating macaque) (Cynomolgus monkey) |
Taxonomic identifieri | 9541 [NCBI] |
Taxonomic lineagei | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Cercopithecidae › Cercopithecinae › Macaca |
Proteomesi |
|
Subcellular locationi
Endoplasmic reticulum
- Endoplasmic reticulum membrane By similarity; Multi-pass membrane protein By similarity
Endoplasmic reticulum
- endoplasmic reticulum membrane Source: UniProtKB-SubCell
Other locations
- integral component of membrane Source: UniProtKB-KW
Topology
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Transmembranei | 55 – 75 | HelicalSequence analysisAdd BLAST | 21 | |
Transmembranei | 100 – 120 | HelicalSequence analysisAdd BLAST | 21 | |
Transmembranei | 199 – 219 | HelicalSequence analysisAdd BLAST | 21 |
Keywords - Cellular componenti
Endoplasmic reticulum, MembranePTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_0000249850 | 1 – 293 | Methylsterol monooxygenase 1Add BLAST | 293 |
Structurei
Family & Domainsi
Domains and Repeats
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Domaini | 145 – 274 | Fatty acid hydroxylaseSequence analysisAdd BLAST | 130 |
Motif
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Motifi | 157 – 161 | Histidine box-1 | 5 | |
Motifi | 170 – 174 | Histidine box-2 | 5 | |
Motifi | 249 – 255 | Histidine box-3 | 7 |
Domaini
The histidine box domains may contain the active site and/or be involved in metal ion binding.By similarity
Sequence similaritiesi
Belongs to the sterol desaturase family.Curated
Keywords - Domaini
Transmembrane, Transmembrane helixPhylogenomic databases
eggNOGi | KOG0873, Eukaryota |
Family and domain databases
InterProi | View protein in InterPro IPR006694, Fatty_acid_hydroxylase |
Pfami | View protein in Pfam PF04116, FA_hydroxylase, 1 hit |
i Sequence
Sequence statusi: Complete.
Q4R4Q4-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
MATNESVSIF SSASLAVEYV DSLLPENPLQ EPFKNAWNYM LNNYTKFQIA
60 70 80 90 100
TWGSLIVHEA LYFSFCLPGF LFQFIPYMKK YKIQKDKPET WENQWKCFKV
110 120 130 140 150
LLFNHFCIQL PLICGTYYFT EYFNIPYDWE RMPRWYFLLA RCFGCAVIED
160 170 180 190 200
TWHYFMHRLL HHKRIYKYIH KVHHEFQAPF GMEAEYAHPL ETLILGTGFF
210 220 230 240 250
IGIVLLCDHV ILLWAWVTIR LLETIDVHSG YDIPLNPLNL IPFYAGSRHH
260 270 280 290
DFHHMNFIGN YASTFTWWDR IFGTDSQYHA YYEKKKKFEK KTE
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AB169840 mRNA Translation: BAE01921.1 |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AB169840 mRNA Translation: BAE01921.1 |
3D structure databases
ModBasei | Search... |
SWISS-MODEL-Workspacei | Submit a new modelling project... |
Protein-protein interaction databases
STRINGi | 9541.XP_005556297.1 |
Phylogenomic databases
eggNOGi | KOG0873, Eukaryota |
Enzyme and pathway databases
UniPathwayi | UPA00063 UPA00770;UER00756 |
Family and domain databases
InterProi | View protein in InterPro IPR006694, Fatty_acid_hydroxylase |
Pfami | View protein in Pfam PF04116, FA_hydroxylase, 1 hit |
MobiDBi | Search... |
Entry informationi
Entry namei | MSMO1_MACFA | |
Accessioni | Q4R4Q4Primary (citable) accession number: Q4R4Q4 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | September 19, 2006 |
Last sequence update: | July 19, 2005 | |
Last modified: | February 23, 2022 | |
This is version 58 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Chordata Protein Annotation Program |
Miscellaneousi
Keywords - Technical termi
Reference proteomeDocuments
- PATHWAY comments
Index of metabolic and biosynthesis pathways - SIMILARITY comments
Index of protein domains and families