Reviewed, UniProtKB/Swiss-Prot Q5R574 (ERG25_PONAB)

Names and origin

Protein names

Recommended name:
    C-4 methylsterol oxidase
    EC=1.14.13.72
Alternative name(s):
    Methylsterol monooxygenase

Gene names

Name:

SC4MOL

Organism

Pongo abelii (Sumatran orangutan)

Taxonomic identifier

9601 [NCBI]

Taxonomic lineage

Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Pongo

Protein attributes

Sequence length	293 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Evidence at transcript level.

General annotation (Comments)

Catalytic activity	4,4-dimethyl-5-alpha-cholest-7-en-3-beta-ol + NAD(P)H + O(2) = 4-beta-hydroxymethyl-4-alpha-methyl-5-alpha-cholest-7-en-3-beta-ol + NAD(P)(+) + H(2)O. 4-beta-hydroxymethyl-4-alpha-methyl-5-alpha-cholest-7-en-3-beta-ol + NAD(P)H + O(2) = 3-beta-hydroxy-4-beta-methyl-5-alpha-cholest-7-ene-4-alpha-carbaldehyde + NAD(P)(+) + 2 H(2)O. 3-beta-hydroxy-4-beta-methyl-5-alpha-cholest-7-ene-4-alpha-carbaldehyde + NAD(P)H + O(2) = 3-beta-hydroxy-4-beta-methyl-5-alpha-cholest-7-ene-4-alpha-carboxylate + NAD(P)(+) + H(2)O.
Cofactor	Iron Probable.
Pathway	Steroid biosynthesis; zymosterol biosynthesis; zymosterol from lanosterol: step 3/6.
Subcellular location	Endoplasmic reticulum membrane; Multi-pass membrane proteinProbable.
Domain	The histidine box domains may contain the active site and/or be involved in metal ion binding By similarity.
Sequence similarities	Belongs to the sterol desaturase family.

Ontologies

Keywords
Biological process	Lipid synthesis Steroid biosynthesis Sterol biosynthesis
Cellular component	Endoplasmic reticulum Membrane
Domain	Transmembrane
Ligand	Iron NAD
Molecular function	Oxidoreductase
Gene Ontology (GO)
Biological process	oxidation reduction Inferred from electronic annotation. Source: UniProtKB-KW sterol biosynthetic process Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	endoplasmic reticulum membrane Inferred from electronic annotation. Source: UniProtKB-SubCell integral to membrane Inferred from electronic annotation. Source: UniProtKB-KW
Molecular function	C-4 methylsterol oxidase activity Inferred from electronic annotation. Source: EC iron ion binding Inferred from electronic annotation. Source: UniProtKB-KW
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 293	293	C-4 methylsterol oxidase		PRO_0000117035
Regions
	Transmembrane	55 – 75	21	Potential
	Transmembrane	100 – 120	21	Potential
	Transmembrane	199 – 219	21	Potential
	Motif	157 – 161	5	Histidine box-1 By similarity
	Motif	170 – 174	5	Histidine box-2 By similarity
	Motif	249 – 255	7	Histidine box-3 By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q5R574-1 [UniParc]. Last modified December 21, 2004. Version 1. Checksum: D88E0DDBE85DE0BF	FASTA	293	35,216
	10 20 30 40 50 60 MATNESVSIF SSASLAVEYV DSLLPENPLQ EPFKNAWNYM LNNYTKFQIA TWGSLIVHEA 70 80 90 100 110 120 LYFLFCLPGF LFQFIPYMKK YKIQKDKPET WENQWKCFKV LLFNHFCIQL PLICGTYYFT 130 140 150 160 170 180 EYFNIPYDWE RMPRWYFLLA RCFGCAVIED TWHYFLHRLL HHKRIYKYIH KVHHEFQAPF 190 200 210 220 230 240 GMEAEYAHPL ETLILGTGFF IGIVLLCDHV ILLWAWVTIR LLETIDVHSG YDIPLNPLNL 250 260 270 280 290 IPFYAGSRHH DFHHMNFIGN YASTFTWWDR IFGTDSQYNA YNEKRKKFEK KTE

References

[1]	The German cDNA consortium Submitted (NOV-2004) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA]. Tissue: Brain cortex.

Cross-references

Sequence databases
EMBLGenBankDDBJ	CR860990 mRNA. Translation: CAH93092.1.
RefSeq	NP_001126831.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	100173838.
Phylogenomic databases
HOVERGEN	Q5R574.
Family and domain databases
InterPro	IPR006088. Sterol_desatur. [Graphical view]
Pfam	PF01598. Sterol_desat. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

ERG25_PONAB

Accession

Primary (citable) accession number: Q5R574

Entry history

Integrated into UniProtKB/Swiss-Prot:	November 22, 2005
Last sequence update:	December 21, 2004
Last modified:	November 4, 2008
This is version 25 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HPI (Human Proteome Initiative)