Endogenous rRNA Sequence Variation Can Regulate Stress Response Gene Expression and Phenotype
| Autor: | Matthew Parks, Boris Zinshteyn, Chad M. Kurylo, Scott C. Blanchard, Jordana K. Thibado, C. Theresa Vincent, Manuel F. Juette, Roger B. Altman |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Models Molecular Cellbiologi Cell- och molekylärbiologi Biology Ribosome General Biochemistry Genetics and Molecular Biology Article Conserved sequence 03 medical and health sciences 0302 clinical medicine Sigma factor Gene expression Operon Escherichia coli lcsh:QH301-705.5 2. Zero hunger Regulation of gene expression Translation (biology) Gene Expression Regulation Bacterial Cell Biology Ribosomal RNA Cell biology 030104 developmental biology Phenotype lcsh:Biology (General) RNA Ribosomal rpoS 030217 neurology & neurosurgery Cell and Molecular Biology |
| Zdroj: | Cell Reports, Vol 25, Iss 1, Pp 236-248.e6 (2018) Cell reports |
| Popis: | SUMMARY Prevailing dogma holds that ribosomes are uniform in composition and function. Here, we show that nutrient limitation-induced stress in E. coli changes the relative expression of rDNA operons to alter the rRNA composition within the actively translating ribosome pool. The most upregulated operon encodes the unique 16S rRNA, rrsH, distinguished by conserved sequence variation within the small ribosomal subunit. rrsH-bearing ribosomes affect the expression of functionally coherent gene sets and alter the levels of the RpoS sigma factor, the master regulator of the general stress response. These impacts are associated with phenotypic changes in antibiotic sensitivity, biofilm formation, and cell motility and are regulated by stress response proteins, RelA and RelE, as well as the metabolic enzyme and virulence-associated protein, AdhE. These findings establish that endogenously encoded, naturally occurring rRNA sequence variation can modulate ribosome function, central aspects of gene expression regulation, and cellular physiology. Graphical Abstract In Brief Most organisms encode multiple, distinct copies of rRNA genes, rendering the composition of the ribosome pool intrinsically heterogeneous. Here, Kurylo et al. show that nutrient limitation in E. coli upregulates the expression of ribosomes bearing conserved sequence variation in 16S rRNA that can regulate gene expression and phenotype. |
| Databáze: | OpenAIRE |
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