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General description of the gene and the encoded protein(s) using information from HGNC and Ensembl, as well as predictions made by the Human Protein Atlas project.
Gene namei
Official gene symbol, which is typically a short form of the gene name, according to HGNC.
Assigned HPA protein class(es) for the encoded protein(s).
Disease related genes Enzymes Human disease related genes Metabolic proteins Plasma proteins Potential drug targets
Predicted locationi
All transcripts of all genes have been analyzed regarding the location(s) of corresponding protein based on prediction methods for signal peptides and transmembrane regions.
Genes with at least one transcript predicted to encode a secreted protein, according to prediction methods or to UniProt location data, have been further annotated and classified with the aim to determine if the corresponding protein(s) are secreted or actually retained in intracellular locations or membrane-attached.
Remaining genes, with no transcript predicted to encode a secreted protein, will be assigned the prediction-based location(s).
The annotated location overrules the predicted location, so that a gene encoding a predicted secreted protein that has been annotated as intracellular will have intracellular as the final location.
Gene information from Ensembl and Entrez, as well as links to available gene identifiers are displayed here. Information was retrieved from Ensembl if not indicated otherwise.
Chromosome
6
Cytoband
p21.33
Chromosome location (bp)
32038327 - 32041644
Number of transcriptsi
Number of protein-coding transcripts from the gene as defined by Ensembl.
Useful information about the protein provided by UniProt.
A cytochrome P450 monooxygenase that plays a major role in adrenal steroidogenesis. Catalyzes the hydroxylation at C-21 of progesterone and 17alpha-hydroxyprogesterone to respectively form 11-deoxycorticosterone and 11-deoxycortisol, intermediate metabolites in the biosynthetic pathway of mineralocorticoids and glucocorticoids 1,2,3,4,5. Mechanistically, uses molecular oxygen inserting one oxygen atom into a substrate, and reducing the second into a water molecule, with two electrons provided by NADPH via cytochrome P450 reductase (CPR; NADPH-ferrihemoprotein reductase) 6....show less
Molecular function (UniProt)i
Keywords assigned by UniProt to proteins due to their particular molecular function.
Monooxygenase, Oxidoreductase
Biological process (UniProt)i
Keywords assigned by UniProt to proteins because they are involved in a particular biological process.
Lipid metabolism, Steroidogenesis
Ligand (UniProt)i
Keywords assigned by UniProt to proteins because they bind, are associated with, or whose activity is dependent of some molecule.
This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This protein localizes to the endoplasmic reticulum and hydroxylates steroids at the 21 position. Its activity is required for the synthesis of steroid hormones including cortisol and aldosterone. Mutations in this gene cause congenital adrenal hyperplasia. A related pseudogene is located near this gene; gene conversion events involving the functional gene and the pseudogene are thought to account for many cases of steroid 21-hydroxylase deficiency. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]...show less
PROTEIN INFORMATIONi
The protein information section displays alternative protein-coding transcripts (splice variants) encoded by this gene according to the Ensembl database.
The Splice variant identifier links to the Ensembl website protein summary for the selected splice variant. The data in the Swissprot and TrEMBL columns links to corresponding pages in the UniProt database.
The protein classes assigned to this protein are shown if expanding the data in the protein class column. Parent protein classes are in bold font and subclasses are listed under the parent class.
The length of the protein (amino acid residues according to Ensembl), molecular mass (kDalton), predicted signal peptide and number of predicted transmembrane region(s) according to in-house majority decision methods based on sets of predictors are also reported.
GO:0004497[monooxygenase activity] GO:0005506[iron ion binding] GO:0016705[oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen] GO:0020037[heme binding] GO:0046872[metal ion binding]
GO:0004497[monooxygenase activity] GO:0005506[iron ion binding] GO:0016705[oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen] GO:0020037[heme binding] GO:0046872[metal ion binding]
Q16874 [Direct mapping] Cytochrome P450 21-hydroxylase; Cytochrome P450, family 21, subfamily A, polypeptide 2, isoform CRA_b; DJ34F7.3 (Cytochrome P450, subfamily XXIA (Steroid 21-hydroxylase, congenital adrenal hyperplasia), polypeptide 2 (CYP21, P450c21B)); Steroid 21-hydroxylase; cDNA, FLJ95495, Homo sapiens cytochrome P450, family 21, subfamily A, polypeptide 2(CYP21A2), mRNA
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Metabolic proteins MEMSAT3 predicted membrane proteins MEMSAT-SVM predicted membrane proteins SPOCTOPUS predicted membrane proteins Secreted proteins predicted by MDSEC Phobius predicted secreted proteins SPOCTOPUS predicted secreted proteins DeepTMHMM predicted secreted proteins DeepSig predicted secreted proteins Predicted intracellular proteins Plasma proteins Human disease related genes Endocrine and metabolic diseases Adrenal gland diseases Protein evidence (Kim et al 2014) DeepTMHMM predicted membrane proteins
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GO:0004497[monooxygenase activity] GO:0005506[iron ion binding] GO:0016491[oxidoreductase activity] GO:0016705[oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen] GO:0020037[heme binding] GO:0046872[metal ion binding]
The Human Protein Atlas project is funded
