title: Influence of inorganic phosphate on the lipid synthesis of a phosphate-deregulated mutant of Streptomyces noursei.
abstract: Phosphate-dependent changes of the mycelial lipid composition were studied in the streptothricin-producing parental strain Streptomyces noursei JA 3890 b/2 and its mutant RG 2. In contrast to its ancestor, the mutant was capable of producing the antibiotic nourseothricin even when large quantities of inorganic phosphate were present in the medium. The apparent insensitivity of the secondary metabolism to phosphate inhibition corresponds to a decreased level of phospholipids in the presence of excessive inorganic phosphate and, during phosphate limitation, to a much higher production of the alkaline phosphatases. A model is discussed which proposed the control by a common genetic element of both the phospholipid and antibiotic production.
authors.forename: F
authors.initials: F
authors.lastname: Hänel
authors.forename: U
authors.initials: U
authors.lastname: Gräfe
authors.forename: M
authors.initials: M
authors.lastname: Roth
authors.forename: E J
authors.initials: EJ
authors.lastname: Bormann
authors.forename: D
authors.initials: D
authors.lastname: Krebs
mesh_terms: D000469:Alkaline Phosphatase / Q000096:biosynthesis; D000900:Anti-Bacterial Agents / Q000096:biosynthesis*; D003470:Culture Media; D008055:Lipids / Q000096:biosynthesis*; D009154:Mutation; D010710:Phosphates / Q000494:pharmacology*; D010743:Phospholipids / Q000096:biosynthesis; D013302:Streptomyces / Q000187:drug effects* / Q000235:genetics / Q000378:metabolism; D013309:Streptothricins / Q000096:biosynthesis*
chemical_list: D000900:Anti-Bacterial Agents; D003470:Culture Media; D008055:Lipids; D010710:Phosphates; D010743:Phospholipids; D013309:Streptothricins; D000469:Alkaline Phosphatase