Project description:RNA timecourse data for Streptomyces fradiae wildtype (ATCC19609) and overproducing strain KOS155-3C(RUS). Strains were grown at 30 C in shake flask cultures in R5 medium with no glucose. RNA samples were harvested over 5 days as tylosin was produced. 12 h RNA samples of each strain were used as the reference sample(green) within their respective timecourses. The WT gDNA vs. 12 h RNA control displays relative gene expression at the beginning of the timecourse. The 12 h RNA control compares initial RNA levels between the WT and overproducer.
Project description:RNA timecourse data for Streptomyces fradiae wildtype (ATCC19609) and overproducing strain KOS155-3C(RUS). Strains were grown at 30 C in shake flask cultures in R5 medium with no glucose. RNA samples were harvested over 5 days as tylosin was produced. 12 h RNA samples of each strain were used as the reference sample(green) within their respective timecourses. The WT gDNA vs. 12 h RNA control displays relative gene expression at the beginning of the timecourse. The 12 h RNA control compares initial RNA levels between the WT and overproducer. Groups of assays that are related as part of a time series. Keywords: time_series_design
Project description:RNA timecourse data for Streptomyces fradiae wildtype (ATCC19609) and overproducing strain KOS155-3C(RUS). Strains were grown at 30 C in shake flask cultures in R5 medium with no glucose. RNA samples were harvested over 5 days as tylosin was produced. 12 h RNA samples of each strain were used as the reference sample(green) within their respective timecourses. The WT gDNA vs. 12 h RNA control displays relative gene expression at the beginning of the timecourse. The 12 h RNA control compares initial RNA levels between the WT and overproducer. Groups of assays that are related as part of a time series. Computed
Project description:Abstract: Transcript levels in production cultures of wildtype and classically improved strains of the actinomycete bacteria Saccharopolyspora erythraea and Streptomyces fradiae were monitored using microarrays of the sequenced actinomycete S. coelicolor. Sac. erythraea and S. fradiae synthesize the polyketide antibiotics erythromycin and tylosin, respectively, and the classically improved strains contain unknown overproduction mutations. The Sac. erythraea overproducer was found to express the entire 56-kb erythromycin gene cluster several days longer than the wildtype strain. In contrast, the S. fradiae wildtype and overproducer strains expressed the 85-kb tylosin biosynthetic gene cluster similarly, while they expressed several tens of other S. fradiae genes and S. coelicolor homologs differently, including the acyl-CoA dehydrogenase gene aco and the S. coelicolor isobutyryl-CoA mutase homolog icmA. These observations indicated that overproduction mechanisms in classically improved strains can affect both the timing and rate of antibiotic synthesis, and alter the regulation of antibiotic biosynthetic enzymes and enzymes involved in precursor metabolism. This SuperSeries is composed of the SubSeries listed below.