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Bi-identical hormone replacement

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https://www.readbyqxmd.com/read/15134457/alanine-scanning-mutagenesis-of-the-testosterone-binding-site-of-rat-3-alpha-hydroxysteroid-dehydrogenase-demonstrates-contact-residues-influence-the-rate-determining-step
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Vladi V Heredia, William C Cooper, Ryan G Kruger, Yi Jin, Trevor M Penning
Aldo-keto reductase (AKR1C) isoforms can regulate ligand access to nuclear receptors by acting as hydroxysteroid dehydrogenases. The principles that govern steroid hormone binding and steroid turnover by these enzymes were analyzed using rat 3alpha-hydroxysteroid dehydrogenase (3alpha-HSD, AKR1C9) as the protein model. Systematic alanine scanning mutagenesis was performed on the substrate-binding pocket as defined by the crystal structure of the 3alpha-HSD.NADP(+).testosterone ternary complex. T24, L54, F118, F129, T226, W227, N306, and Y310 were individually mutated to alanine, while catalytic residues Y55 and H117 were unaltered...
May 18, 2004: Biochemistry
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