title: Tetrafibricin, a novel fibrinogen receptor antagonist. I. Taxonomy, fermentation, isolation, characterization and biological activities.
abstract: Tetrafibricin is a novel fibrinogen receptor antagonist produced by Streptomyces neyagawaensis NR0577. It was isolated from the culture broth by Diaion HP-21 adsorption, MeOH extraction, MCI GEL CHP-20P column chromatography, preparative HPLC and Toyopearl HW-40 SF column chromatography. The physico-chemical properties of tetrafibricin indicated that the structure of tetrafibricin is different from the known peptide fibrinogen receptor antagonists and closely related to the polyene macrolide antibiotics. Tetrafibricin strongly inhibited the binding of fibrinogen to its receptors with an IC50 of 46 nM. It also inhibited ADP-, collagen-, and thrombin-induced aggregation of human platelets with IC50s of 5.6, 11.0 and 7.6 microM, respectively.
authors.affiliation: Nippon Roche Research Center, Kanagawa, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kamiyama
authors.forename: T
authors.initials: T
authors.lastname: Umino
authors.forename: N
authors.initials: N
authors.lastname: Fujisaki
authors.forename: K
authors.initials: K
authors.lastname: Fujimori
authors.forename: T
authors.initials: T
authors.lastname: Satoh
authors.forename: Y
authors.initials: Y
authors.lastname: Yamashita
authors.forename: S
authors.initials: S
authors.lastname: Ohshima
authors.forename: J
authors.initials: J
authors.lastname: Watanabe
authors.forename: K
authors.initials: K
authors.lastname: Yokose
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D005285:Fermentation; D006801:Humans; D066298:In Vitro Techniques; D018942:Macrolides; D010980:Platelet Membrane Glycoproteins / Q000037:antagonists & inhibitors*; D013302:Streptomyces / Q000145:classification / Q000378:metabolism*
chemical_list: D000900:Anti-Bacterial Agents; D018942:Macrolides; D010980:Platelet Membrane Glycoproteins; C082780:tetrafibricin