Estradiol 3-glucuronide
0Estradiol 3-glucuronide is a natural steroid and an estrogen glucuronide conjugate of estradiol. It is formed in the liver by glucuronidation of estradiol by UDP-glucuronosyltransferase. This process is a major pathway of estradiol metabolism in the body.
Structure and Properties[edit | edit source]
Estradiol 3-glucuronide is a molecule that consists of a glucuronide group attached to the 3-position of the estradiol molecule. The glucuronide group is a sugar molecule that is attached to the steroid molecule via a glycosidic bond. The presence of the glucuronide group increases the water solubility of the steroid, which facilitates its excretion in the urine.
Biosynthesis[edit | edit source]
The biosynthesis of estradiol 3-glucuronide involves the enzyme UDP-glucuronosyltransferase. This enzyme catalyzes the transfer of a glucuronic acid group from UDP-glucuronic acid to estradiol. The reaction occurs in the liver, which is the primary site of steroid metabolism in the body.
Biological Role[edit | edit source]
Estradiol 3-glucuronide is a major metabolite of estradiol, which is the most potent naturally occurring estrogen. The formation of estradiol 3-glucuronide is a key step in the inactivation and elimination of estradiol from the body. The glucuronide conjugate is more water-soluble than estradiol, which facilitates its excretion in the urine.
Clinical Significance[edit | edit source]
Measurement of estradiol 3-glucuronide levels in the urine can be used as a marker of ovarian function and estrogen production. Elevated levels of estradiol 3-glucuronide can be indicative of conditions such as polycystic ovary syndrome and ovarian hyperstimulation syndrome.
See Also[edit | edit source]
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