title: Comparison of substrate specificities of the human placental NAD- and NADP-linked 15-hydroxyprostaglandin dehydrogenases.
abstract: A study of the relative activity of the purified placental NAD- and NADP-linked 15-hydroxyprostaglandin dehydrogenases with various prostaglandins and thromboxane B2 (TxB2) suggests that most, if not all, oxidation in the placenta of the 15-hydroxyl group of prostaglandins of the A, E, and F series as well as PGI2 (prostacyclin) and 6-keto PGF1 alpha is catalyzed by the NAD-linked enzyme. Prostaglandin B1 is an excellent substrate for the NADP-linked enzyme. Despite the conformational similarities between PGB1 and PGI2, the latter molecule is a poor substrate for the NADP-linked enzyme. Thromboxane B2 is not oxidized by the NAD-linked enzyme and is oxidized slowly by the NADP-linked enzyme.
mesh_terms: D005260:Female; D006801:Humans; D006911:Hydroxyprostaglandin Dehydrogenases / Q000378:metabolism*; D008968:Molecular Conformation; D009243:NAD / Q000378:metabolism*; D009249:NADP / Q000378:metabolism*; D010084:Oxidation-Reduction; D010920:Placenta / Q000201:enzymology*; D011247:Pregnancy; D011453:Prostaglandins / Q000378:metabolism; D013379:Substrate Specificity; D013929:Thromboxane B2 / Q000378:metabolism
chemical_list: D011453:Prostaglandins; D009243:NAD; D009249:NADP; D013929:Thromboxane B2; D006911:Hydroxyprostaglandin Dehydrogenases