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Gene Symbol |
CYP21A2 |
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Aliases |
CA21H, CAH1, CPS1, CYP21, CYP21B, P450c21B |
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Entrez Gene ID |
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Gene Name |
Cytochrome P450 family 21 subfamily A member 2 |
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Chromosomal Location |
6p21.33 |
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HGNC ID |
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Summary |
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]
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RefSeq DNA |
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RefSeq mRNA |
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e!Ensembl
Gene |
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Transcript |
ENST00000448478, ENST00000496557, ENST00000473538, ENST00000466302, ENST00000460626, ENST00000468340, ENST00000496471, ENST00000475619, ENST00000459819, ENST00000434026, ENST00000489833, ENST00000383322, ENST00000469664, ENST00000460689, ENST00000496483, ENST00000492024, ENST00000467455, ENST00000461324, ENST00000465847, ENST00000383321, ENST00000466779, ENST00000486063, ENST00000479074, ENST00000479730, ENST00000480027, ENST00000483041, ENST00000478281, ENST00000488465, ENST00000471671, ENST00000435122, ENST00000644719, ENST00000469053, ENST00000464325, ENST00000466879, ENST00000462278, ENST00000456152, ENST00000487373, ENST00000487592, ENST00000493137, ENST00000472130, ENST00000495919, ENST00000466275, ENST00000474613, ENST00000466113, ENST00000452386, ENST00000448314, ENST00000480731, ENST00000494168, ENST00000468185, ENST00000470187, ENST00000477608, ENST00000469046, ENST00000486312, ENST00000480660, ENST00000452708, ENST00000436607, ENST00000496685, ENST00000489576, ENST00000464272, ENST00000460263, ENST00000493848, ENST00000497396, ENST00000462292, ENST00000494716, ENST00000448877 |
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Protein |
ENSP00000416598, , ENSP00000392321, ENSP00000372812, ENSP00000372811, ENSP00000417321, ENSP00000419572, ENSP00000418561, ENSP00000415043, ENSP00000496625, ENSP00000418104, ENSP00000394942, ENSP00000403230, ENSP00000398594, ENSP00000390312, ENSP00000403721, ENSP00000407338
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SNPs
SNP |
SNP ID |
Associated disease |
References |
Val281Leu |
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Precocious puberty |
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Gln318X |
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Premature pubarche |
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R356W |
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Premature pubarche |
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8bpdelE3 |
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Premature pubarche |
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intron 2 splice |
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Premature pubarche |
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M150R |
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Premature pubarche |
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Intron 2(A/C 656 to G) |
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Premature pubarche |
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R341W |
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Gonadotropin Independent Precocious Puberty |
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823G>A |
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Gonadotropin Independent Precocious Puberty |
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I172N |
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Premature pubarche |
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P30L |
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Premature pubarche |
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P453S |
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Premature pubarche |
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Asn493Ser |
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Premature pubarche |
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P453S |
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Premature pubarche |
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Protein Information |
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Protein Name |
Steroid 21-hydroxylase, 21-OHase, cytochrome P450 XXI, cytochrome P450, family 21, subfamily A, polypeptide 2, cytochrome P450, subfamily XXIA (steroid 21-hydroxylase, congenital adrenal hyperplasia), polypeptide 2, cytochrome P450-C21B, steroid 21 hydroxylase, steroid 21-monooxygenase |
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Function |
Specifically catalyzes the 21-hydroxylation of steroids. Required for the adrenal synthesis of mineralocorticoids and glucocorticoids (PubMed:22014889). |
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UniProt |
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PDB |
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References |
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PubMed ID |
Disease |
SNP/Mutation |
Study population |
Ethnicity |
Age of study population |
Type of sample |
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Precocious puberty |
Val281Leu |
Total patients- Test: 32 girls |
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0.7- 7.7 years |
Blood |
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Premature pubarche |
V281L |
Total patients- 36 girls |
French of Mediterranean origin |
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Blood |
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Premature pubarche |
P30L, I172N |
Girls:1 |
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Onset age - 3.5years |
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Premature pubarche |
V281L, I172N, P30L, P453S, Q318X, |
Total Patients- 40 children (PP: 6 boys and 34 girls), 29 adolescent girls (hyperandrogenism), Controls- Women:15 (white) |
Black, White, Asian-white, Black-white |
Group 1 - 4.6-10.75 years, Group 2 - 10.4-18 years |
Blood |
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Premature pubarche |
V2181L, P453S, P30L, P482S |
Total Patients- 152 children (114 girls and 38 boys) |
Italian origin |
(before 8 years in girls and 9 years in boys |
Blood |
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Premature pubarche |
P30L, V281L, R356W, I172N, P453S, Q318C, 8bpdelE3, intron 2 splice |
Adolscent girls (with history of premature pubarche) :45 |
Greek |
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Blood |
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Premature pubarche |
Asn493Ser |
476 CAH patients |
Middle European |
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Blood |
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Gonadotropin Independent Precocious Puberty |
R341W, 823G>A |
Boys:1 |
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7years 4month |
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