title: A cytochrome P450-like gene possibly involved in oleandomycin biosynthesis by Streptomyces antibioticus.
abstract: A cosmid clone from an oleandomycin producer, Streptomyces antibioticus, contains a large open reading frame encoding a type I polyketide synthase subunit and an oleandomycin resistance gene (oleB). Sequencing of a 1.4-kb DNA fragment adjacent to oleB revealed the existence of an open reading frame (oleP) encoding a protein similar to several cytochrome P450 monooxygenases from different sources, including the products of the eryF and eryK genes from Saccharopolyspora erythraea that participate in erythromycin biosynthesis. The oleP gene was expressed in Escherichia coli as a fusion protein to a maltose-binding protein. Using polyclonal antibodies against this fusion protein it was observed that the synthesis of the cytochrome P450 was in parallel to that of oleandomycin. The cytochrome P450 encoded by the oleP gene could be responsible for the epoxidation of carbon 8 of the oleandomycin lactone ring.
authors.affiliation: Departamento de Biología Funcional, Universidad de Oviedo, Spain.
authors.forename: A M
authors.initials: AM
authors.lastname: Rodriguez
authors.forename: C
authors.initials: C
authors.lastname: Olano
authors.forename: C
authors.initials: C
authors.lastname: Méndez
authors.forename: C R
authors.initials: CR
authors.lastname: Hutchinson
authors.forename: J A
authors.initials: JA
authors.lastname: Salas
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000096:biosynthesis / Q000235:genetics / Q000276:immunology; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics*; D004352:Drug Resistance, Microbial / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics; D005798:Genes, Bacterial; D007700:Kinetics; D008969:Molecular Sequence Data; D009097:Multienzyme Complexes / Q000235:genetics; D009827:Oleandomycin / Q000096:biosynthesis*; D016366:Open Reading Frames; D010105:Oxygenases / Q000235:genetics*; D017386:Sequence Homology, Amino Acid; D013303:Streptomyces antibioticus / Q000235:genetics* / Q000378:metabolism*
chemical_list: D001426:Bacterial Proteins; D009097:Multienzyme Complexes; D003577:Cytochrome P-450 Enzyme System; D010105:Oxygenases; D009827:Oleandomycin