title: Generation and study of the strains of streptomycetes - heterologous hosts for production of moenomycin.
abstract: Moenomycins (Mm) are family of phosphoglycolipid natural products that is considered a blueprint to develop new class of antibiotics. The natural Mm producer,Streptomyces ghanaensis(ATCC14672), produces very low amounts of moenomycin, fueling the investigations on genetic approaches to improve its titers. Heterologous expression of moenomycin biosynthesis gene cluster (moe) would be one of the ways to reach this goal. Here we report the generation of a number of novel heterologous streptomycete hosts producing nosokomycin A2(one of the members of Mm family), and determine their potential for the antibiotic production. TherpoBpoint mutation in the model strain ofStreptomycesgenetics,S. coelicolor(strain M1152) significantly improved nosokomycin A2production compared to parental strains (M145 and M512), while doublerpoBrpsLmutation in the same species (strain M1154) decreased it. Our results point to the previously unanticipated epistatic interactions between mutations that individually are known to be highly beneficial for antibiotic production. We also showed here for the first time that facultative chemolitotrophic streptomyceteS. thermospinosisporusand chloramphenicol producerS. venezuelaecan be used as the hosts formoegenes.
authors.affiliation: Department of Genetics and Biotechnology, Ivan Franko National University of Lviv, Lviv 79005, Ukraine.
authors.forename: M
authors.initials: M
authors.lastname: Lopatniuk
authors.affiliation: Department of Genetics and Biotechnology, Ivan Franko National University of Lviv, Lviv 79005, Ukraine.
authors.forename: B
authors.initials: B
authors.lastname: Ostash
authors.affiliation: Helmholtz Institute for Pharmaceutical Research, University of Saarland, 66123 Saarbrucken, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Luzhetskyy
authors.affiliation: Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA 02115, USA.
authors.forename: S
authors.initials: S
authors.lastname: Walker
authors.affiliation: Department of Genetics and Biotechnology, Ivan Franko National University of Lviv, Lviv 79005, Ukraine.
authors.forename: V
authors.initials: V
authors.lastname: Fedorenko