Project description:We performed ribosome profiling which is the deep-sequencing of mRNA fragments protected by translating ribosome for two Streptomyces species through different growth phases to provide the translatome data
Project description:Biofilms are ubiquitous in natural, medical, and engineering environments. While most antibiotics that primarily aim to inhibit cell growth may result in bacterial drug resistance, biofilm inhibitors do not affect cell growth and there is less chance of developing resistance. This work sought to identify novel, non-toxic and potent biofilm inhibitors from Streptomyces bacteria for reducing the biofilm formation of Pseudomonas aeruginosa PAO1. Out of 4300 Streptomyces strains, one species produced and secreted peptide(s) to inhibit P. aeruginosa biofilm formation by 93% without affecting the growth of planktonic cells. Global transcriptome analyses (DNA microarray) revealed that the supernatant of the Streptomyces 230 strain induced phenazine, pyoverdine, and pyochelin synthesis genes. Electron microscopy showed that the supernatant of Streptomyces 230 strain reduced the production of polymeric matrix in P. aeruginosa biofilm cells, while the Streptomyces species enhanced swarming motility of P. aeruginosa. Therefore, current study suggests that Streptomyces bacteria are an important resource of biofilm inhibitors as well as antibiotics.
Project description:The goal of this study is to use both "targeted" and "untargeted" metabolomics to elucidate metabolism of Clostrial and Streptomyces species for biofuel production and plant growth promotion, respectively. For these species, we aim to improve the curation of genome-scale metabolic networks and elucidate their novel secondary metabolism to make secondary metabolites whose identities are waiting to be discovered. These metabolic networks will be used to study cell physiology, metabolism, regulation, and metabolic engineering.
The work (proposal:https://doi.org/10.46936/10.25585/60000463) conducted by the U.S. Department of Energy Joint Genome Institute (https://ror.org/04xm1d337), a DOE Office of Science User Facility, is supported by the Office of Science of the U.S. Department of Energy operated under Contract No. DE-AC02-05CH11231.
Project description:Streptomyces coelicolor normally produce spores with a relatively high heterogeneity, which will produce genetically heterogeneous sub-populations. These sub-populations often exert massive chromosome amplifications and deletions. Cells with gross chromosomal changes produce an increased diversity of secondary metabolites and secrete significantly more antibiotics; however, these changes come at the cost of dramatically reduced individual fitness, providing direct evidence for a trade-off between secondary metabolite production and fitness. We propose that antibiotic production in colonies of the multicellular bacterium Streptomyces coelicolor is coordinated by a division of labour. This proteomics survey will provide more detailed insights into how these chromosomal changed strains behave under normal growth condition.
Project description:This study compared the genome of Streptomyces rimosus rimosus against that of Streptomyces coelicolor. It also compared 4 strains with changes in oxytetracycline production and derived from G7, the type strain, against G7. Keywords: Comparative genomic hybridization
Project description:We discovered the bacteria Streptomyces venezuelae can display a new form of growth termed exploration, and we used NGS to compare transcriptome profiles of cells demonstrating exploration versus static cells (not demonstrating exploration)
Project description:This study aimed to investigate the variations in the protein composition of Streptomyces sp. PU10 when cultivated with either Impranil (polyestere-polyurethane) or glucose as the carbon source. We analyzed both the intracellular and extracellular protein fractions to gain insights into the intricate processes involving PU degradation, intermediate metabolic pathways in PU degradation, and the connection between primary and secondary metabolism within Streptomyces sp. PU10.
