title: Physiological analysis of bicozamycin high-producing Streptomyces griseoflavus used at industrial level.
abstract: Streptomyces griseoflavus, a bicozamycin-producing wild type strain and its high-producing one derived from it by multiple (greater than 15) mutagenic treatments, were analyzed physiologically and biochemically. The high-producing strain was characterized by: (1) An increased pool size of amino acids including leucine and isoleucine, precursors for bicozamycin synthesis, (2) an earlier and greater accumulation of intracellular ppGpp, (3) a more accentuated decrease in GTP pool size, (4) a higher specific activity of ornithine transcarbamylase which produces citrulline, (5) an increased ability to form aerial mycelium, and (6) an increased resistance to its own antibiotic. We propose that (1), (2) and (4) may be responsible for the high yields of bicozamycin and, possibly, of some other antibiotics produced by Streptomyces sp.
authors.affiliation: Exploratory Research Laboratories, Fujisawa Pharmaceutical Co., Ltd., Ibaraki, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Ochi
authors.forename: Y
authors.initials: Y
authors.lastname: Tsurumi
authors.forename: N
authors.initials: N
authors.lastname: Shigematsu
authors.forename: M
authors.initials: M
authors.lastname: Iwami
authors.forename: K
authors.initials: K
authors.lastname: Umehara
authors.forename: M
authors.initials: M
authors.lastname: Okuhara
mesh_terms: D000596:Amino Acids / Q000032:analysis; D001643:Bridged Bicyclo Compounds / Q000096:biosynthesis / Q000494:pharmacology; D019086:Bridged Bicyclo Compounds, Heterocyclic; D004352:Drug Resistance, Microbial; D006159:Guanosine Tetraphosphate / Q000378:metabolism; D009154:Mutation; D009711:Nucleotides / Q000032:analysis; D009954:Ornithine Carbamoyltransferase / Q000378:metabolism; D013302:Streptomyces / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D001643:Bridged Bicyclo Compounds; D019086:Bridged Bicyclo Compounds, Heterocyclic; D009711:Nucleotides; D006159:Guanosine Tetraphosphate; D009954:Ornithine Carbamoyltransferase; C024504:bicozamycin