title: SNA-8073-B, a new isotetracenone antibiotic inhibits prolyl endopeptidase. I. Fermentation, isolation and biological properties.
abstract: SNA-8073-B, an inhibitor of prolyl endopeptidase isolated from the broth filtrate of Streptomyces sp. SNA-8073, is a new isotetracenone antibiotic. It was purified by ethyl acetate extraction, silica gel column chromatography and high performance liquid chromatography on ODS column. SNA-8073-B has the molecular formula of C20H16O5 and is a stereoisomer of SNA-8073-A (fujianmycin B, rubiginone A2). SNA-8073-B inhibited prolyl endopeptidase of Flavobacterium non-competitively (IC50 = 8.9 microM) when Z-Gly-Pro-pNA was used as a substrate, but SNA-8073-A did not show any inhibition even at 60 microM.
authors.affiliation: Research Institute of Life Science, Snow Brand Milk Products Co., Ltd., Tochigi, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kimura
authors.forename: F
authors.initials: F
authors.lastname: Kanou
authors.forename: H
authors.initials: H
authors.lastname: Koshino
authors.forename: M
authors.initials: M
authors.lastname: Uramoto
authors.forename: M
authors.initials: M
authors.lastname: Yoshihama
mesh_terms: D000880:Anthraquinones / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002851:Chromatography, High Pressure Liquid; D005285:Fermentation; D000085822:Prolyl Oligopeptidases; D012697:Serine Endopeptidases / Q000378:metabolism; D015842:Serine Proteinase Inhibitors / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D013237:Stereoisomerism; D013302:Streptomyces; D000095602:Angucyclines and Angucyclinones
chemical_list: D000880:Anthraquinones; D000900:Anti-Bacterial Agents; D000085822:Prolyl Oligopeptidases; D012697:Serine Endopeptidases; D015842:Serine Proteinase Inhibitors; C045695:fujianmycin B; D000095602:Angucyclines and Angucyclinones