Abstract
The insert of 1278 bp containing the entire coding region of cDNA encoding human 17β-hydroxysteroid dehydrogenase (17β-HSD) was inserted into a pHS1 vector and expressed in HeLA human cervical carcinoma cells and COS-1 monkey kidney tumor cells. Western blot analysis indicated that the expressed protein migrates at the same position as the purified enzyme and is recognized by the antibody raised against purified human placental 17β-HSD. The expressed enzyme efficiently catalyzes the interconversion of estrone and estradiol while dehydroepiandrosterone and 5-androstene-3β,17β-diol are interconverted at a lower rate. The present data suggest the existence of two 17β-HSDs.
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More From: Journal of Steroid Biochemistry and Molecular Biology
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