title: Inhibition of prolyl hydroxylase activity and collagen biosynthesis by the anthraquinone glycoside, P-1894B, an inhibitor produced by Streptomyces albogriseolus.
abstract: P-1894B, a potent prolyl hydroxylase inhibitor produced by Streptomyces albogriseolus subsp. No. 1894, inhibited about 50% of the activity of purified chick embryo prolyl hydroxylase at a concentration of 2.2 x 10(-6) M. The inhibition was noncompetitive with respect to (Pro-Pro-Gly)5 with a Ki of 1.8 x 10(-6)M. When excess amounts of ferrous ions or ascorbate were added to the reaction mixture, the inhibition was slightly reversed. P-1894B at a dose of 0.15 mg/kg reduced the hydroxylation of peptidyl proline and caused a significant inhibition of collagen biosynthesis in the uterus of the immature rat stimulated by the administration of estradiol-17 beta.
mesh_terms: D000818:Animals; D000880:Anthraquinones / Q000494:pharmacology*; D003094:Collagen / Q000096:biosynthesis*; D005260:Female; D066298:In Vitro Techniques; D011393:Procollagen-Proline Dioxygenase / Q000037:antagonists & inhibitors*; D051381:Rats; D011919:Rats, Inbred Strains; D013302:Streptomyces / Q000032:analysis*; D014599:Uterus / Q000378:metabolism
chemical_list: D000880:Anthraquinones; C032958:vineomycin A1; D003094:Collagen; D011393:Procollagen-Proline Dioxygenase