Streptogramin B biosynthesis in Streptomyces pristinaespiralis and Streptomyces virginiae: molecular characterization of the last structural peptide synthetase gene

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Streptogramin B biosynthesis in Streptomyces pristinaespiralis and Streptomyces virginiae: molecular characterization of the last structural peptide synthetase gene.

Streptomyces pristinaespiralis and S. virginiae both produce closely related hexadepsipeptide antibiotics of the streptogramin B family. Pristinamycins I and virginiamycins S differ only in the fifth incorporated precursor, di(mono)methylated amine and phenylalanine, respectively. By using degenerate oligonucleotide probes derived from internal sequences of the purified S. pristinaespiralis Snb...

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Transfection in Streptomyces virginiae

Until now, transformation with linear DNA has not been demonstrated in Streptomycetes, although it has been established in a thermophilic Actinomyces species, Thermoactinomyces vulgaris (Hopwood & Wright, 1972). The main tool used in Streptomycete genetics is conjugation (Hopwood, 1967). In the wake of a genetic map for Streptomyces coelicolor, maps for other strains were constructed by means o...

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Characterization of biosynthetic gene cluster for the production of virginiamycin M, a streptogramin type A antibiotic, in Streptomyces virginiae.

Virginiamycin M (VM) of Streptomyces virginiae is a hybrid polyketide-peptide antibiotic with peptide antibiotic virginiamycin S (VS) as its synergistic counterpart. VM and VS belong to the Streptogramin family, which is characterized by strong synergistic antibacterial activity, and their water-soluble derivatives are a new therapeutic option for combating vancomycin-resistant Gram-positive ba...

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A Complex Signaling Cascade Governs Pristinamycin Biosynthesis in Streptomyces pristinaespiralis.

Pristinamycin production in Streptomyces pristinaespiralis Pr11 is tightly regulated by an interplay between different repressors and activators. A γ-butyrolactone receptor gene (spbR), two TetR repressor genes (papR3 and papR5), three SARP (Streptomyces antibiotic regulatory protein) genes (papR1, papR2, and papR4), and a response regulator gene (papR6) are carried on the large 210-kb pristina...

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Characterization of the ‘pristinamycin supercluster’ of Streptomyces pristinaespiralis

Pristinamycin, produced by Streptomyces pristinaespiralis Pr11, is a streptogramin antibiotic consisting of two chemically unrelated compounds, pristinamycin I and pristinamycin II. The semi-synthetic derivatives of these compounds are used in human medicine as therapeutic agents against methicillin-resistant Staphylococcus aureus strains. Only the partial sequence of the pristinamycin biosynth...

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ژورنال

عنوان ژورنال: Antimicrobial Agents and Chemotherapy

سال: 1997

ISSN: 0066-4804,1098-6596

DOI: 10.1128/aac.41.9.1904