General Information of This Metabolic Reaction (MR) (ID: MR002727)
Formula Reactant Ethinyl estradiol Product Ethinylestradiol-3,17-sulfate
Reactant Info Product Info
Metabolic Enzyme Carboxylesterase 1 (CES1) DME Info
Sulfotransferase 1A3 (SULT1A3) DME Info
Sulfotransferase 1A4 (SULT1A4) DME Info
Metabolic Type Conjugation - Sulfation
Other MR(s) Related to The Reactant of This MR
Other MR(s) That Metabolize The Reactant of This MR
MR ID Reactant Product MR Type Related Drug REF
MR002725 Ethinyl estradiol 16alpha-hydroxyethinylestradiol Oxidation - 16-Hydroxylation Ethinyl estradiol [1]
MR002721 Ethinyl estradiol 2-hydroxyethinylestradiol Oxidation - 2-Hydroxylation Ethinyl estradiol [1]
MR002722 Ethinyl estradiol 4-hydroxyethinylestradiol Oxidation - 4-Hydroxylation Ethinyl estradiol [1]
MR002723 Ethinyl estradiol 6-hydroxyethinylestradiol Oxidation - 6-Hydroxylation Ethinyl estradiol [1]
MR002724 Ethinyl estradiol 7-hydroxyethinylestradiol Oxidation - 7-Hydroxylation Ethinyl estradiol [1]
MR002728 Ethinyl estradiol Ethinylestradiol-17-sulfate Conjugation - Sulfation Ethinyl estradiol [2]
MR002726 Ethinyl estradiol Ethinylestradiol-3-sulfate Conjugation - Sulfation Ethinyl estradiol [1]
MR002720 Ethinyl estradiol N-desmethylzopiclone Conjugation - O-Glucuronidation Ethinyl estradiol [3]
References
1 Sulfotransferase 1E1 is a low km isoform mediating the 3-O-sulfation of ethinyl estradiol Drug Metab Dispos. 2004 Nov;32(11):1299-303. doi: 10.1124/dmd.32.11..
2 The pharmacokinetics and metabolism of ethinyl estradiol and its three sulfates in the baboon Am J Obstet Gynecol. 1983 May 1;146(1):80-7. doi: 10.1016/0002-9378(83)90931-6.
3 Human bilirubin UDP-glucuronosyltransferase catalyzes the glucuronidation of ethinylestradiol Mol Pharmacol. 1993 Apr;43(4):649-54.

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