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MT000168

UniProt Annotations

Entry Information

Gene Name	cytochrome P450, family 11, subfamily B, polypeptide 1
Protein Entry	C11B1_HUMAN
UniProt ID	P15538
Species	Human

Comments

Comment type	Description
Alternative Products	Event=Alternative splicing; Named isoforms=2; Name=1; IsoId=P15538-1; Sequence=Displayed; Name=2; IsoId=P15538-2; Sequence=VSP_043308; Note=No experimental confirmation available.;
Catalytic Activity	A steroid + 2 reduced adrenodoxin + O(2) + 2 H(+) = an 11-beta- hydroxysteroid + 2 oxidized adrenodoxin + H(2)O.
Cofactor	Name=heme; Xref=ChEBI:CHEBI:30413; Evidence={ECO:0000250\|UniProtKB:P19099};
Disease	Adrenal hyperplasia 4 (AH4) [MIM:202010]: A form of congenital adrenal hyperplasia, a common recessive disease due to defective synthesis of cortisol. Congenital adrenal hyperplasia is characterized by androgen excess leading to ambiguous genitalia in affected females, rapid somatic growth during childhood in both sexes with premature closure of the epiphyses and short adult stature. Four clinical types: 'salt wasting' (SW, the most severe type), 'simple virilizing' (SV, less severely affected patients), with normal aldosterone biosynthesis, 'non-classic form' or late- onset (NC or LOAH)and 'cryptic' (asymptomatic). {ECO:0000269\|PubMed:16046588, ECO:0000269\|PubMed:2022736, ECO:0000269\|PubMed:20331679, ECO:0000269\|PubMed:20947076, ECO:0000269\|PubMed:9302260}. Note=The disease is caused by mutations affecting the gene represented in this entry.
Disease	Familial hyperaldosteronism 1 (FH1) [MIM:103900]: A disorder characterized by hypertension, variable hyperaldosteronism, and abnormal adrenal steroid production, including 18-oxocortisol and 18-hydroxycortisol. There is significant phenotypic heterogeneity, and some individuals never develop hypertension. Note=The disease is caused by mutations affecting the gene represented in this entry. The molecular defect causing hyperaldosteronism familial 1 is an anti-Lepore-type fusion of the CYP11B1 and CYP11B2 genes. The hybrid gene has the promoting part of CYP11B1, ACTH-sensitive, and the coding part of CYP11B2.
Function	Has steroid 11-beta-hydroxylase activity. In addition to this activity, the 18 or 19-hydroxylation of steroids and the aromatization of androstendione to estrone have also been ascribed to cytochrome P450 XIB.
Similarity	Belongs to the cytochrome P450 family. {ECO:0000305}.
Subcellular Location	Mitochondrion membrane.