title: Development, antibiotic production, and ribosome assembly in Streptomyces venezuelae are impacted by RNase J and RNase III deletion.
abstract: RNA metabolism is a critical but frequently overlooked control element affecting virtually every cellular process in bacteria. RNA processing and degradation is mediated by a suite of ribonucleases having distinct cleavage and substrate specificity. Here, we probe the role of two ribonucleases (RNase III and RNase J) in the emerging model system Streptomyces venezuelae. We show that each enzyme makes a unique contribution to the growth and development of S. venezuelae and further affects the secondary metabolism and antibiotic production of this bacterium. We demonstrate a connection between the action of these ribonucleases and translation, with both enzymes being required for the formation of functional ribosomes. RNase III mutants in particular fail to properly process 23S rRNA, form fewer 70S ribosomes, and show reduced translational processivity. The loss of either RNase III or RNase J additionally led to the appearance of a new ribosomal species (the 100S ribosome dimer) during exponential growth and dramatically sensitized these mutants to a range of antibiotics.
authors.affiliation: Department of Biology and the Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, ON, Canada.
authors.forename: Stephanie E
authors.initials: SE
authors.lastname: Jones
authors.affiliation: Department of Biochemistry and Biomedical Sciences and the Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, ON, Canada.
authors.forename: Vivian
authors.initials: V
authors.lastname: Leong
authors.affiliation: Department of Biochemistry and Biomedical Sciences and the Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, ON, Canada.
authors.forename: Joaquin
authors.initials: J
authors.lastname: Ortega
authors.affiliation: Department of Biology and the Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, ON, Canada melliot@mcmaster.ca.
authors.forename: Marie A
authors.initials: MA
authors.lastname: Elliot
mesh_terms: D000900:Anti-Bacterial Agents / Q000096:biosynthesis*; D017353:Gene Deletion; D014176:Protein Biosynthesis; D012260:Ribonucleases / Q000235:genetics / Q000378:metabolism*; D012270:Ribosomes / Q000378:metabolism*; D064210:Secondary Metabolism; D013302:Streptomyces / Q000201:enzymology* / Q000235:genetics / Q000254:growth & development
chemical_list: D000900:Anti-Bacterial Agents; D012260:Ribonucleases