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Aldosterone synthase, also called steroid 18-hydroxylase, corticosterone 18-monooxygenase or P450C18, is a steroid hydroxylase cytochrome P450 enzyme involved in the biosynthesis of the mineralocorticoid aldosterone and other steroids. The enzyme catalyzes sequential hydroxylations of the steroid angular methyl group at C18 after initial 11β ...
Steroid desmolases. Cholesterol side-chain cleavage enzyme (20,22-desmolase) – steroid synthesis; 17,20-Lyase (17,20-desmolase) – androgen synthesis; Steroid hydroxylases. 11β-Hydroxylase – corticosteroid synthesis; 17α-Hydroxylase – androgen and glucocorticoid synthesis; 18-Hydroxylase (aldosterone synthase) – mineralocorticoid ...
Aldosterone synthase normally is not ACTH sensitive, and is only activated by angiotensin II. [citation needed] Aldosterone causes the tubules of the kidneys to retain sodium and water. This increases the volume of fluid in the body and drives up blood pressure. [citation needed] Steroid hormones are synthesized from cholesterol within the ...
2 Additional images. 3 References. ... Print/export Download as PDF; Printable version; ... Corticosteroid biosynthetic pathway in rat.
Corticosterone, also known as 17-deoxycortisol and 11β,21-dihydroxyprogesterone, [1] is a 21-carbon steroid hormone of the corticosteroid type produced in the cortex of the adrenal glands. In the very rare case of congenital adrenal hyperplasia due to 17α-hydroxylase deficiency cortisol production is blocked.
The name mineralocorticoid derives from early observations that these hormones were involved in the retention of sodium, a mineral.The primary endogenous mineralocorticoid is aldosterone, although a number of other endogenous hormones (including progesterone [1] and deoxycorticosterone) have mineralocorticoid function.
11-Deoxycorticosterone (DOC), or simply deoxycorticosterone, also known as 21-hydroxyprogesterone, as well as desoxycortone (), deoxycortone, and cortexone, [1] [2] is a steroid hormone produced by the adrenal gland that possesses mineralocorticoid activity and acts as a precursor to aldosterone. [3]
The outermost layer, the zona glomerulosa is the main site for the production of aldosterone, a mineralocorticoid. The synthesis and secretion of aldosterone are mainly regulated by the renin–angiotensin–aldosterone system. The zona glomerulosa cells express a specific enzyme aldosterone synthase (also known as CYP11B2).