22R-Hydroxycholesterol

22R-Hydroxycholesterol

Names
IUPAC name (3β)-Cholest-5-ene-3,22-diol
Identifiers
ChemSpider	96893
InChI InChI=1S/C27H46O2/c1-17(2)6-11-25(29)18(3)22-9-10-23-21-8-7-19-16-20(28)12-14-26(19,4)24(21)13-15-27(22,23)5/h7,17-18,20-25,28-29H,6,8-16H2,1-5H3/t18-,20-,21-,22+,23-,24-,25?,26-,27+/m0/s1 Key: RZPAXNJLEKLXNO-UKNNTIGFSA-N InChI=1/C27H46O2/c1-17(2)6-11-25(29)18(3)22-9-10-23-21-8-7-19-16-20(28)12-14-26(19,4)24(21)13-15-27(22,23)5/h7,17-18,20-25,28-29H,6,8-16H2,1-5H3/t18-,20-,21-,22+,23-,24-,25?,26-,27+/m0/s1 Key: RZPAXNJLEKLXNO-UKNNTIGFBU
Jmol-3D images	Image
PubChem	107724
SMILES O[C@@H]4C/C3=C/C[C@@H]1[C@H](CC[C@]2([C@H]1CC[C@@H]2[C@H](C)C(O)CCC(C)C)C)[C@@]3(C)CC4
Properties
Chemical formula	C27H46O2
Molar mass	402.653 g/mol
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

22R-Hydroxycholesterol, or (3β)-cholest-5-ene-3,22-diol is an endogenous, metabolic intermediate in the biosynthesis of the steroid hormones from cholesterol.^[1][2] Cholesterol ((3β)-cholest-5-en-3-ol) is hydroxylated by cholesterol side-chain cleavage enzyme (P450scc) to form 22R-hydroxycholesterol, which is subsequently hydroxlated again by P450scc to form 20α,22R-dihydroxycholesterol, and finally the bond between carbons 20 and 22 is cleaved by P450scc to form pregnenolone ((3β)-3-hydroxypregn-5-en-20-one),^[1][2] the precursor to the steroid hormones.

See also

• 20α,22R-Dihydroxycholesterol

References