Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1040237 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Ribosome profiling reveals conserved guanosine residues at ribosome pausing sites in Bacillus subtilis
| PRJNA1053350 | ENA
Project description:Ribosome pausing slows down translation and can affect protein synthesis. Improving translation efficiency can therefore be of commercial value. Here, we investigated the occurrence of ribosome pausing during amylase secretion by the industrial production organism Bacillus subtilis under semi fed-batch fermentation conditions. We first assessed our ribosome profiling setup by inducing ribosome stalling at isoleucine codons using the antibiotic mupirocin, and found a pause preference for isoleucine codons preceded by E and P site codons with guanosine residues in their first nucleotide position. Interestingly, when we applied standard ribosomal profiling conditions we found again an enrichment of guanosine residues in the E and P site of ribosome pause sites, but this time also upstream of the ribosome pause site. This sequence motif deviates from previously described ribosome pausing motifs. For the highly expressed amylase gene amyM several strong ribosome pausing sites were detected, which remained present during the 64-hour long fermentation, and were neither related to rare codons nor to secondary protein structures. When surveying the genome, an interesting finding was the presence of strong ribosome pausing sites in several toxins genes. These potential ribosome stall sites may function in preventing inadvertent activity in the cytosol.
2024-01-01 | GSE250313 | GEO
Project description:Ribosome pausing slows down translation and can affect protein synthesis. Improving translation efficiency can therefore be of commercial value. Here, we investigated the occurrence of ribosome pausing during amylase secretion by the industrial production organism Bacillus subtilis under semi fed-batch fermentation conditions. We first assessed our ribosome profiling setup by inducing ribosome stalling at isoleucine codons using the antibiotic mupirocin, and found a pause preference for isoleucine codons preceded by E and P site codons with guanosine residues in their first nucleotide position. Interestingly, when we applied standard ribosomal profiling conditions we found again an enrichment of guanosine residues in the E and P site of ribosome pause sites, but this time also upstream of the ribosome pause site. This sequence motif deviates from previously described ribosome pausing motifs. For the highly expressed amylase gene amyM several strong ribosome pausing sites were detected, which remained present during the 64-hour long fermentation, and were neither related to rare codons nor to secondary protein structures. When surveying the genome, an interesting finding was the presence of strong ribosome pausing sites in several toxins genes. These potential ribosome stall sites may function in preventing inadvertent activity in the cytosol.
2024-01-01 | GSE250312 | GEO
Project description:Translation elongation factor P (EF-P) alleviates ribosome pausing at a subset of motifs encoding consecutive proline residues and is required for growth in many organisms. Here we show that Bacillus subtilis EF-P also alleviated ribosome pausing at sequences encoding tandem prolines, and ribosomes paused within several essential genes without a corresponding growth defect in an efp mutant. The B. subtilis efp mutant is instead impaired for flagellar biosynthesis which results in the abrogation of a form of motility called swarming. We isolate swarming suppressors of efp and identify mutations in 8 genes that suppressed the efp mutant swarming defect, many of which encode conserved ribosomal proteins or ribosome-associated factors. One mutation abolished a translational pause site within the flagellar C-ring component FliY to increase flagellar number and restore swarming motility in the absence of EF-P. Our data support a model wherein EF-P-alleviation of ribosome pausing may be particularly important for macromolecular assemblies like the flagellum that require precise protein stoichiometries.
2019-05-20 | GSE126234 | GEO
Project description:Translation elongation factor P (EF-P) alleviates ribosome pausing at a subset of motifs encoding consecutive proline residues and is required for growth in many organisms. Here we show that Bacillus subtilis EF-P also alleviated ribosome pausing at sequences encoding tandem prolines, and ribosomes paused within several essential genes without a corresponding growth defect in an efp mutant. The B. subtilis efp mutant is instead impaired for flagellar biosynthesis which results in the abrogation of a form of motility called swarming. We isolate swarming suppressors of efp and identify mutations in 8 genes that suppressed the efp mutant swarming defect, many of which encode conserved ribosomal proteins or ribosome-associated factors. One mutation abolished a translational pause site within the flagellar C-ring component FliY to increase flagellar number and restore swarming motility in the absence of EF-P. Our data support a model wherein EF-P-alleviation of ribosome pausing may be particularly important for macromolecular assemblies like the flagellum that require precise protein stoichiometries.
2019-05-20 | GSE126233 | GEO
Project description:We report the discovery of a simple environmental sensing mechanism for biofilm formation in the bacterium Bacillus subtilis that operates without the involvement of a dedicated RNA or protein. Certain serine codons, the four UCN codons, in the gene for the biofilm repressor SinR caused a lowering of SinR levels under biofilm-inducing conditions. Synonymous substitutions of these UCN codons with AGC or AGU impaired biofilm formation and gene expression. Conversely, switching AGC or AGU to UCN codons upregulated biofilm formation. Genome-wide ribosome profiling showed that ribosomes paused longer at UCN codons than at AGC or AGU during biofilm formation. Serine starvation recapitulated the effect of biofilm-inducing conditions on ribosome pausing and SinR production. As serine is one of the first amino acids to be exhausted at the end of exponential phase growth, ribosome pausing at serine codons may be exploited by other microbes in adapting to stationary phase. 4 samples for ribosome profiling and 2 samples for total mRNA profiling
2013-10-22 | E-GEOD-50870 | biostudies-arrayexpress
Project description:The stringent response represses translation and is activated when amino acid levels drop, for example during the stationary phase. Bacillus subtilis, a well-known industrial enzyme production organism, secretes most enzymes during the stationary phase. We were curious whether the stringent response affects ribosome pausing, and whether its absence improves protein production yields in the stationary phase. To investigate this, genome-wide ribosome profiling was used using a stringent response mutant that overexpressed the α-amylase AmyM. Although, blocking the stringent response did increases overall protein synthesis, the secretion of AmyM was actually reduced. The ribosome profiling data revealed that this was not caused by a reduction in translation. In fact, absence of the stringent response did not seem to markedly influence ribosome pausing. However, late in stationary phase an increased ribosome pausing at tryptophane codons emerges, suggesting a depletion of tryptophane. A strong suppression of tryptophane biosynthesis and acquisition genes, under control of the trp RNA-binding attenuation protein TRAP, likely accounts for this, although TRAP does not belong to the stringent response regulon of B. subtilis. Finally, the ribosome profiles revealed several genes with unusually low translation activities, illustrating the importance of translation initiation as a regulatory element of expression.
2025-05-01 | GSE293166 | GEO
Project description:The stringent response represses translation and is activated when amino acid levels drop, for example during the stationary phase. Bacillus subtilis, a well-known industrial enzyme production organism, secretes most enzymes during the stationary phase. We were curious whether the stringent response affects ribosome pausing, and whether its absence improves protein production yields in the stationary phase. To investigate this, genome-wide ribosome profiling was used using a stringent response mutant that overexpressed the α-amylase AmyM. Although, blocking the stringent response did increases overall protein synthesis, the secretion of AmyM was actually reduced. The ribosome profiling data revealed that this was not caused by a reduction in translation. In fact, absence of the stringent response did not seem to markedly influence ribosome pausing. However, late in stationary phase an increased ribosome pausing at tryptophane codons emerges, suggesting a depletion of tryptophane. A strong suppression of tryptophane biosynthesis and acquisition genes, under control of the trp RNA-binding attenuation protein TRAP, likely accounts for this, although TRAP does not belong to the stringent response regulon of B. subtilis. Finally, the ribosome profiles revealed several genes with unusually low translation activities, illustrating the importance of translation initiation as a regulatory element of expression.
2025-05-01 | GSE293165 | GEO
Project description:Genome-wide profiling reveals cancer-related genes have switched alternative polyadenylation sites in colorectal cancer
2025-01-23 | E-MTAB-6403 | ExpressionAtlas