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Details on Person Steroid 21-hydroxylase (CYP21A2) specifically catalyses the ...
| Class:Id | Summation:5601987 |
|---|---|
| _displayName | Steroid 21-hydroxylase (CYP21A2) specifically catalyses the ... |
| _timestamp | 2014-09-08 17:20:31 |
| created | [InstanceEdit:5601985] Jassal, Bijay, 2014-06-16 |
| modified | [InstanceEdit:5622022] Jassal, Bijay, 2014-09-08 |
| text | Steroid 21-hydroxylase (CYP21A2) specifically catalyses the 21-hydroxylation of steroids which is required for the adrenal synthesis of mineralocorticoids and glucocorticoids. Defects in CYP21A2 can cause adrenal hyperplasia 3 (AH3; MIM:201910), a form of congenital adrenal hyperplasia (CAH) where cortisol synthesis is defective. This results in increased ACTH levels, causing overproduction and accumulation of cortisol precursors, particularly 17-hydroxyprogesterone (17HPROG). The resultant excessive production of androgens causes virilization. The most severe form of CAH caused by CYP21A2 is known as salt-wasting (SW), which is due to complete or almost complete loss of enzymatic activity. CYP21A2 mutations causing SW include G292S, V237E, Q318*, W406*, E380D (Wedell et al. 1992, White et al. 1998, Robins et al. 2005, Wedell & Luthman 1993, Kirby-Keyser et al. 1997). |
| (summation) | [FailedReaction:5601976] Defective CYP21A2 does not 21-hydroxylate PROG [Homo sapiens] |
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