17-alpha,20-alpha-Dihydroxypregn-4-en-3-one
IUPAC 名称
(1S,2R,10R,11S,14R,15S)-14-hydroxy-14-[(1S)-1-hydroxyethyl]-2,15-dimethyltetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-6-en-5-one
描述
17 alpha, 20 alpha-dihydroxy-4-pregnen-3-one (17 alpha, 20 alpha-OHP) is a steroid hormone that is elevated in late pregnancy. In particular, the concentration of plasma 17,20 alpha-OHP is significantly increased during the third trimester of pregnancy, and the increment continues to increase through labor and delivery (PMID: 6874891). 17 alpha, 20 alpha-dihydroxy-4-pregnen-3-one is known to be a substrate for the enzyme 20a-hydroxysteroid dehydrogenase or 20alpha-HSD (EC 1.1.1.149). This enzyme catalyzes the chemical reaction: 17alpha,20alpha-dihydroxypregn-4-en-3-one + NAD(P)+ = 17alpha-hydroxyprogesterone + NAD(P)H + H+. This enzyme is actively involved in the control of progesterone homeostasis in pregnancy of mammals. While 20alpha-HSD expression and activity is downregulated in the corpus luteum of pregnancy, 24 hrs prior to parturition ovarian 20alpha-HSD activity is acutely stimulated. [HMDB]
异构
[H][C@@]12CC[C@](O)([C@H](C)O)[C@@]1(C)CC[C@@]1([H])[C@@]2([H])CCC2=CC(=O)CC[C@]12C
InChI标识符
InChI=1S/C21H32O3/c1-13(22)21(24)11-8-18-16-5-4-14-12-15(23)6-9-19(14,2)17(16)7-10-20(18,21)3/h12-13,16-18,22,24H,4-11H2,1-3H3/t13-,16+,17-,18-,19-,20-,21-/m0/s1
键
MASCESDECGBIBB-HNXXTFFGSA-N