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Inhibition of tRNA charging activates the ISR without inducing RNP granules. ( A ) U-2 OS cells were treated with 0.2% DMSO carrier, 20 µM halofuginone (HF), 250 µM sodium arsenite (As), or 1.25 µM thapsigargin (Tg) for 1 h, and Western blotting for phosphorylated and total eIF2α was done. Total protein ( n = 3 independent replicates) and molecular weights (in kilodaltons) are shown. ( B ) Translation activity was measured using bioorthogonal noncanonical amino acid tagging in cells treated as in A . Methionine or azidohomoalanine (AHA) was added 10 min prior to collection. The ratio of nascent to total protein is shown from n = 3 independent replicates. ( C ) U-2 OS cells stably expressing GFP-G3BP1 (green) were treated as in A and fixed, and nuclei were stained with Hoechst (blue). The percentage of cells with SGs was quantified from n = 3 independent experiments; ≥305 cells were counted in each condition. Scale bars, 10 µm. ( D ) Cells were treated as in C , and immunofluorescence and fluorescence in situ hybridization were done to detect UBAP2L (magenta), <t>PABPC1</t> (cyan), and poly(A) RNA with oligo(dT) probes (yellow) ( n = 2 independent experiments). ( E ) Cells were treated with 0.2% DMSO, 20 µM HF plus 0.2% DMSO, 250 µM arsenite, or 1.25 µM thapsigargin for 1 h, and the percentage of cells with SGs was quantified ( n = 3 independent experiments); ≥287 cells were counted per treatment. ( F ) Cells were treated, and immunofluorescence microscopy was done as in D to detect the P-body marker DCP1A. Quantification of the percentage of cells with P-bodies (PBs) from n = 3 independent experiments is shown; ≥364 cells were counted per treatment. ( G ) Cells were treated as in C to detect XRN1 (magenta) and EDC4 (yellow) by immunofluorescence microscopy ( n = 2 independent experiments). ( H ) U-2 OS cells were treated as in E , and immunofluorescence microscopy was done to detect DCP1A. The percentage of cells with PBs from n = 3 independent experiments is shown; ≥351 cells were counted per treatment across all replicates. Representative images are shown with the average ± SEM for each experiment, and green, gray, and pink points represent the average of each replicate. Statistical significance was assessed with an ordinary one-way ANOVA followed by Tukey's multiple comparisons test. (*) P < 0.05, (**) P < 0.01, (***) P < 0.005, (****) P < 0.001.
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Inhibition of tRNA charging activates the ISR without inducing RNP granules. ( A ) U-2 OS cells were treated with 0.2% DMSO carrier, 20 µM halofuginone (HF), 250 µM sodium arsenite (As), or 1.25 µM thapsigargin (Tg) for 1 h, and Western blotting for phosphorylated and total eIF2α was done. Total protein ( n = 3 independent replicates) and molecular weights (in kilodaltons) are shown. ( B ) Translation activity was measured using bioorthogonal noncanonical amino acid tagging in cells treated as in A . Methionine or azidohomoalanine (AHA) was added 10 min prior to collection. The ratio of nascent to total protein is shown from n = 3 independent replicates. ( C ) U-2 OS cells stably expressing GFP-G3BP1 (green) were treated as in A and fixed, and nuclei were stained with Hoechst (blue). The percentage of cells with SGs was quantified from n = 3 independent experiments; ≥305 cells were counted in each condition. Scale bars, 10 µm. ( D ) Cells were treated as in C , and immunofluorescence and fluorescence in situ hybridization were done to detect UBAP2L (magenta), <t>PABPC1</t> (cyan), and poly(A) RNA with oligo(dT) probes (yellow) ( n = 2 independent experiments). ( E ) Cells were treated with 0.2% DMSO, 20 µM HF plus 0.2% DMSO, 250 µM arsenite, or 1.25 µM thapsigargin for 1 h, and the percentage of cells with SGs was quantified ( n = 3 independent experiments); ≥287 cells were counted per treatment. ( F ) Cells were treated, and immunofluorescence microscopy was done as in D to detect the P-body marker DCP1A. Quantification of the percentage of cells with P-bodies (PBs) from n = 3 independent experiments is shown; ≥364 cells were counted per treatment. ( G ) Cells were treated as in C to detect XRN1 (magenta) and EDC4 (yellow) by immunofluorescence microscopy ( n = 2 independent experiments). ( H ) U-2 OS cells were treated as in E , and immunofluorescence microscopy was done to detect DCP1A. The percentage of cells with PBs from n = 3 independent experiments is shown; ≥351 cells were counted per treatment across all replicates. Representative images are shown with the average ± SEM for each experiment, and green, gray, and pink points represent the average of each replicate. Statistical significance was assessed with an ordinary one-way ANOVA followed by Tukey's multiple comparisons test. (*) P < 0.05, (**) P < 0.01, (***) P < 0.005, (****) P < 0.001.
Pabpc1 Antibody, supplied by Proteintech, used in various techniques. Bioz Stars score: 94/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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Inhibition of tRNA charging activates the ISR without inducing RNP granules. ( A ) U-2 OS cells were treated with 0.2% DMSO carrier, 20 µM halofuginone (HF), 250 µM sodium arsenite (As), or 1.25 µM thapsigargin (Tg) for 1 h, and Western blotting for phosphorylated and total eIF2α was done. Total protein ( n = 3 independent replicates) and molecular weights (in kilodaltons) are shown. ( B ) Translation activity was measured using bioorthogonal noncanonical amino acid tagging in cells treated as in A . Methionine or azidohomoalanine (AHA) was added 10 min prior to collection. The ratio of nascent to total protein is shown from n = 3 independent replicates. ( C ) U-2 OS cells stably expressing GFP-G3BP1 (green) were treated as in A and fixed, and nuclei were stained with Hoechst (blue). The percentage of cells with SGs was quantified from n = 3 independent experiments; ≥305 cells were counted in each condition. Scale bars, 10 µm. ( D ) Cells were treated as in C , and immunofluorescence and fluorescence in situ hybridization were done to detect UBAP2L (magenta), <t>PABPC1</t> (cyan), and poly(A) RNA with oligo(dT) probes (yellow) ( n = 2 independent experiments). ( E ) Cells were treated with 0.2% DMSO, 20 µM HF plus 0.2% DMSO, 250 µM arsenite, or 1.25 µM thapsigargin for 1 h, and the percentage of cells with SGs was quantified ( n = 3 independent experiments); ≥287 cells were counted per treatment. ( F ) Cells were treated, and immunofluorescence microscopy was done as in D to detect the P-body marker DCP1A. Quantification of the percentage of cells with P-bodies (PBs) from n = 3 independent experiments is shown; ≥364 cells were counted per treatment. ( G ) Cells were treated as in C to detect XRN1 (magenta) and EDC4 (yellow) by immunofluorescence microscopy ( n = 2 independent experiments). ( H ) U-2 OS cells were treated as in E , and immunofluorescence microscopy was done to detect DCP1A. The percentage of cells with PBs from n = 3 independent experiments is shown; ≥351 cells were counted per treatment across all replicates. Representative images are shown with the average ± SEM for each experiment, and green, gray, and pink points represent the average of each replicate. Statistical significance was assessed with an ordinary one-way ANOVA followed by Tukey's multiple comparisons test. (*) P < 0.05, (**) P < 0.01, (***) P < 0.005, (****) P < 0.001.
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Inhibition of tRNA charging activates the ISR without inducing RNP granules. ( A ) U-2 OS cells were treated with 0.2% DMSO carrier, 20 µM halofuginone (HF), 250 µM sodium arsenite (As), or 1.25 µM thapsigargin (Tg) for 1 h, and Western blotting for phosphorylated and total eIF2α was done. Total protein ( n = 3 independent replicates) and molecular weights (in kilodaltons) are shown. ( B ) Translation activity was measured using bioorthogonal noncanonical amino acid tagging in cells treated as in A . Methionine or azidohomoalanine (AHA) was added 10 min prior to collection. The ratio of nascent to total protein is shown from n = 3 independent replicates. ( C ) U-2 OS cells stably expressing GFP-G3BP1 (green) were treated as in A and fixed, and nuclei were stained with Hoechst (blue). The percentage of cells with SGs was quantified from n = 3 independent experiments; ≥305 cells were counted in each condition. Scale bars, 10 µm. ( D ) Cells were treated as in C , and immunofluorescence and fluorescence in situ hybridization were done to detect UBAP2L (magenta), <t>PABPC1</t> (cyan), and poly(A) RNA with oligo(dT) probes (yellow) ( n = 2 independent experiments). ( E ) Cells were treated with 0.2% DMSO, 20 µM HF plus 0.2% DMSO, 250 µM arsenite, or 1.25 µM thapsigargin for 1 h, and the percentage of cells with SGs was quantified ( n = 3 independent experiments); ≥287 cells were counted per treatment. ( F ) Cells were treated, and immunofluorescence microscopy was done as in D to detect the P-body marker DCP1A. Quantification of the percentage of cells with P-bodies (PBs) from n = 3 independent experiments is shown; ≥364 cells were counted per treatment. ( G ) Cells were treated as in C to detect XRN1 (magenta) and EDC4 (yellow) by immunofluorescence microscopy ( n = 2 independent experiments). ( H ) U-2 OS cells were treated as in E , and immunofluorescence microscopy was done to detect DCP1A. The percentage of cells with PBs from n = 3 independent experiments is shown; ≥351 cells were counted per treatment across all replicates. Representative images are shown with the average ± SEM for each experiment, and green, gray, and pink points represent the average of each replicate. Statistical significance was assessed with an ordinary one-way ANOVA followed by Tukey's multiple comparisons test. (*) P < 0.05, (**) P < 0.01, (***) P < 0.005, (****) P < 0.001.
Anti Pabpc1, supplied by Proteintech, used in various techniques. Bioz Stars score: 94/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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Inhibition of tRNA charging activates the ISR without inducing RNP granules. ( A ) U-2 OS cells were treated with 0.2% DMSO carrier, 20 µM halofuginone (HF), 250 µM sodium arsenite (As), or 1.25 µM thapsigargin (Tg) for 1 h, and Western blotting for phosphorylated and total eIF2α was done. Total protein ( n = 3 independent replicates) and molecular weights (in kilodaltons) are shown. ( B ) Translation activity was measured using bioorthogonal noncanonical amino acid tagging in cells treated as in A . Methionine or azidohomoalanine (AHA) was added 10 min prior to collection. The ratio of nascent to total protein is shown from n = 3 independent replicates. ( C ) U-2 OS cells stably expressing GFP-G3BP1 (green) were treated as in A and fixed, and nuclei were stained with Hoechst (blue). The percentage of cells with SGs was quantified from n = 3 independent experiments; ≥305 cells were counted in each condition. Scale bars, 10 µm. ( D ) Cells were treated as in C , and immunofluorescence and fluorescence in situ hybridization were done to detect UBAP2L (magenta), <t>PABPC1</t> (cyan), and poly(A) RNA with oligo(dT) probes (yellow) ( n = 2 independent experiments). ( E ) Cells were treated with 0.2% DMSO, 20 µM HF plus 0.2% DMSO, 250 µM arsenite, or 1.25 µM thapsigargin for 1 h, and the percentage of cells with SGs was quantified ( n = 3 independent experiments); ≥287 cells were counted per treatment. ( F ) Cells were treated, and immunofluorescence microscopy was done as in D to detect the P-body marker DCP1A. Quantification of the percentage of cells with P-bodies (PBs) from n = 3 independent experiments is shown; ≥364 cells were counted per treatment. ( G ) Cells were treated as in C to detect XRN1 (magenta) and EDC4 (yellow) by immunofluorescence microscopy ( n = 2 independent experiments). ( H ) U-2 OS cells were treated as in E , and immunofluorescence microscopy was done to detect DCP1A. The percentage of cells with PBs from n = 3 independent experiments is shown; ≥351 cells were counted per treatment across all replicates. Representative images are shown with the average ± SEM for each experiment, and green, gray, and pink points represent the average of each replicate. Statistical significance was assessed with an ordinary one-way ANOVA followed by Tukey's multiple comparisons test. (*) P < 0.05, (**) P < 0.01, (***) P < 0.005, (****) P < 0.001.
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Inhibition of tRNA charging activates the ISR without inducing RNP granules. ( A ) U-2 OS cells were treated with 0.2% DMSO carrier, 20 µM halofuginone (HF), 250 µM sodium arsenite (As), or 1.25 µM thapsigargin (Tg) for 1 h, and Western blotting for phosphorylated and total eIF2α was done. Total protein ( n = 3 independent replicates) and molecular weights (in kilodaltons) are shown. ( B ) Translation activity was measured using bioorthogonal noncanonical amino acid tagging in cells treated as in A . Methionine or azidohomoalanine (AHA) was added 10 min prior to collection. The ratio of nascent to total protein is shown from n = 3 independent replicates. ( C ) U-2 OS cells stably expressing GFP-G3BP1 (green) were treated as in A and fixed, and nuclei were stained with Hoechst (blue). The percentage of cells with SGs was quantified from n = 3 independent experiments; ≥305 cells were counted in each condition. Scale bars, 10 µm. ( D ) Cells were treated as in C , and immunofluorescence and fluorescence in situ hybridization were done to detect UBAP2L (magenta), <t>PABPC1</t> (cyan), and poly(A) RNA with oligo(dT) probes (yellow) ( n = 2 independent experiments). ( E ) Cells were treated with 0.2% DMSO, 20 µM HF plus 0.2% DMSO, 250 µM arsenite, or 1.25 µM thapsigargin for 1 h, and the percentage of cells with SGs was quantified ( n = 3 independent experiments); ≥287 cells were counted per treatment. ( F ) Cells were treated, and immunofluorescence microscopy was done as in D to detect the P-body marker DCP1A. Quantification of the percentage of cells with P-bodies (PBs) from n = 3 independent experiments is shown; ≥364 cells were counted per treatment. ( G ) Cells were treated as in C to detect XRN1 (magenta) and EDC4 (yellow) by immunofluorescence microscopy ( n = 2 independent experiments). ( H ) U-2 OS cells were treated as in E , and immunofluorescence microscopy was done to detect DCP1A. The percentage of cells with PBs from n = 3 independent experiments is shown; ≥351 cells were counted per treatment across all replicates. Representative images are shown with the average ± SEM for each experiment, and green, gray, and pink points represent the average of each replicate. Statistical significance was assessed with an ordinary one-way ANOVA followed by Tukey's multiple comparisons test. (*) P < 0.05, (**) P < 0.01, (***) P < 0.005, (****) P < 0.001.
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Inhibition of tRNA charging activates the ISR without inducing RNP granules. ( A ) U-2 OS cells were treated with 0.2% DMSO carrier, 20 µM halofuginone (HF), 250 µM sodium arsenite (As), or 1.25 µM thapsigargin (Tg) for 1 h, and Western blotting for phosphorylated and total eIF2α was done. Total protein ( n = 3 independent replicates) and molecular weights (in kilodaltons) are shown. ( B ) Translation activity was measured using bioorthogonal noncanonical amino acid tagging in cells treated as in A . Methionine or azidohomoalanine (AHA) was added 10 min prior to collection. The ratio of nascent to total protein is shown from n = 3 independent replicates. ( C ) U-2 OS cells stably expressing GFP-G3BP1 (green) were treated as in A and fixed, and nuclei were stained with Hoechst (blue). The percentage of cells with SGs was quantified from n = 3 independent experiments; ≥305 cells were counted in each condition. Scale bars, 10 µm. ( D ) Cells were treated as in C , and immunofluorescence and fluorescence in situ hybridization were done to detect UBAP2L (magenta), PABPC1 (cyan), and poly(A) RNA with oligo(dT) probes (yellow) ( n = 2 independent experiments). ( E ) Cells were treated with 0.2% DMSO, 20 µM HF plus 0.2% DMSO, 250 µM arsenite, or 1.25 µM thapsigargin for 1 h, and the percentage of cells with SGs was quantified ( n = 3 independent experiments); ≥287 cells were counted per treatment. ( F ) Cells were treated, and immunofluorescence microscopy was done as in D to detect the P-body marker DCP1A. Quantification of the percentage of cells with P-bodies (PBs) from n = 3 independent experiments is shown; ≥364 cells were counted per treatment. ( G ) Cells were treated as in C to detect XRN1 (magenta) and EDC4 (yellow) by immunofluorescence microscopy ( n = 2 independent experiments). ( H ) U-2 OS cells were treated as in E , and immunofluorescence microscopy was done to detect DCP1A. The percentage of cells with PBs from n = 3 independent experiments is shown; ≥351 cells were counted per treatment across all replicates. Representative images are shown with the average ± SEM for each experiment, and green, gray, and pink points represent the average of each replicate. Statistical significance was assessed with an ordinary one-way ANOVA followed by Tukey's multiple comparisons test. (*) P < 0.05, (**) P < 0.01, (***) P < 0.005, (****) P < 0.001.

Journal: Genes & Development

Article Title: tRNA synthetase activity is required for stress granule and P-body assembly

doi: 10.1101/gad.353535.125

Figure Lengend Snippet: Inhibition of tRNA charging activates the ISR without inducing RNP granules. ( A ) U-2 OS cells were treated with 0.2% DMSO carrier, 20 µM halofuginone (HF), 250 µM sodium arsenite (As), or 1.25 µM thapsigargin (Tg) for 1 h, and Western blotting for phosphorylated and total eIF2α was done. Total protein ( n = 3 independent replicates) and molecular weights (in kilodaltons) are shown. ( B ) Translation activity was measured using bioorthogonal noncanonical amino acid tagging in cells treated as in A . Methionine or azidohomoalanine (AHA) was added 10 min prior to collection. The ratio of nascent to total protein is shown from n = 3 independent replicates. ( C ) U-2 OS cells stably expressing GFP-G3BP1 (green) were treated as in A and fixed, and nuclei were stained with Hoechst (blue). The percentage of cells with SGs was quantified from n = 3 independent experiments; ≥305 cells were counted in each condition. Scale bars, 10 µm. ( D ) Cells were treated as in C , and immunofluorescence and fluorescence in situ hybridization were done to detect UBAP2L (magenta), PABPC1 (cyan), and poly(A) RNA with oligo(dT) probes (yellow) ( n = 2 independent experiments). ( E ) Cells were treated with 0.2% DMSO, 20 µM HF plus 0.2% DMSO, 250 µM arsenite, or 1.25 µM thapsigargin for 1 h, and the percentage of cells with SGs was quantified ( n = 3 independent experiments); ≥287 cells were counted per treatment. ( F ) Cells were treated, and immunofluorescence microscopy was done as in D to detect the P-body marker DCP1A. Quantification of the percentage of cells with P-bodies (PBs) from n = 3 independent experiments is shown; ≥364 cells were counted per treatment. ( G ) Cells were treated as in C to detect XRN1 (magenta) and EDC4 (yellow) by immunofluorescence microscopy ( n = 2 independent experiments). ( H ) U-2 OS cells were treated as in E , and immunofluorescence microscopy was done to detect DCP1A. The percentage of cells with PBs from n = 3 independent experiments is shown; ≥351 cells were counted per treatment across all replicates. Representative images are shown with the average ± SEM for each experiment, and green, gray, and pink points represent the average of each replicate. Statistical significance was assessed with an ordinary one-way ANOVA followed by Tukey's multiple comparisons test. (*) P < 0.05, (**) P < 0.01, (***) P < 0.005, (****) P < 0.001.

Article Snippet: PABPC1 , Proteintech , 66809 , 1:100 (immunofluorescence).

Techniques: Inhibition, Western Blot, Activity Assay, Stable Transfection, Expressing, Staining, Immunofluorescence, Fluorescence, In Situ Hybridization, Microscopy, Marker