EMBO/SourceData huggingface dataset:
Figure 8A) ATG9 positive membranes were immunoisolated from approximately 2 × 107 fed (F) or starved (S) HEK293A cells using a monoclonal hamster anti-ATG9 (ATG9) or control hamster IgM and immunoblotted for ATG9 using a rabbit polyclonal antibody, TRAPPC8, TRAPPC4 and actin.B) HEK293A cells transfected with GFP or GFP-TBR (green) were stained for ATG9 using hamster anti-ATG9 (red) and analysed by confocal microscopy. Scale bar = 20 μmC) HEK293A cells transiently transfected with RISC Free siRNA or siRNA against TRAPPC8 were stained for RAB1B (green) and ATG9 using hamster anti-ATG9 (red) and imaged using confocal microscopy.D) Stills at t = 30 minutes from time lapse imaging of 9B9 cells (stably expressing GFP-LC3 and mRFP-ATG9) expressing either CFP or CFP-TBR (blue). Scale bars = 20 μm. Inset panels show mRFP-ATG9 and GFP-LC3 contact events at the indicated time points. Bar chart shows number of times a GFP-LC3 spot was within 1 μm of an mRFP-ATG9 spot (a contact event), expressed as total mRFP-ATG9 contacts per GFP-LC3 spot, n = 18 cells per condition pooled from 4 independent experiments.
Figure 9A) Cells depleted of ULK1 (siULK1) or not (RISC Free) were transfected with GFP or GFP-TBR (green), starved (EBSS) or not (-EBSS) and stained for ATG9 using hamster anti-ATG9 (red). Arrows indicate transfected cells. Western blot indicates ULK1 knockdown. Scale bars = 20 μm.B) Cells depleted of ULK1 (siULK1) or not (RISC Free) were transfected with myc-RAB1B or myc-RAB1B (S22N) (green), starved (EBSS) or not (-EBSS) and stained for ATG9 using hamster anti-ATG9 (red) Arrows indicate transfected cells. Western blot indicates ULK1 knockdown. Scale bars = 20 μm.
Figure 1(B) ParB clusters on F plasmid in vivo. Typical E. coli cells (DLT3594) displays foci of ParBF-mVenus protein (top) expressed from the endogenous genetic locus of the F plasmid (F1-10B-mVenus). The nucleoid is labelled with Hu-mCherry (central). The overlay (bottom) combines the two fluorescent channels. Over 99 % of cells harbor ParBF foci. White bars: 1 µm(C) ParBF binding outside parSF on the F plasmid is compatible with a power-law decay. High resolution ChIP-seq performed on DLT3586 carrying the F plasmid (F1-10B). The ParB density, normalized to 1 at the first bp downstream the last parSF binding repeat after background subtraction, is displayed over 14-Kbp on the right side of parSF. Monte Carlo simulations and analytic formula are represented in red and dotted black lines, respectively. MC simulations were performed with a Freely-Jointed Chain of linear length L=15-Kbp and a cluster radius σ=75nm. The two other parameters, the Kuhn length a=10-bp and the total number of proteins on the F plasmid Nt=360 (related to the normalization constant of the protein concentration κ=0.41) were fitted from the ChIP-seq data (see text and Fig. EV2). As a benchmark for simulations, the analytics are obtained from Eq.(1) with the same parameters. Inset; The ParBF binding profile (black line) is represented as the number of nucleotide reads over 80-Kbp centered at parS. The number of reads in the Input sample (grey line) is normalized to the total number of reads in the IP sampleTypical E. coli cell displays foc expressed from the endogenous genetic locus of the F plasmid (F1-10B-mVenus). The nucleoid is labelled with Hu-mCherry (central). The overlay (bottom) combines the two fluorescent channels parSF inserted at the xylE locus on E. coli chromosome from DLT358ParBF binding outside parSF on the F plasmid is compatible with a power-law decay. High resolution ChIP-seq performed on DLT3586 carrying the F plasmid (F1-10B). The ParB density, normalized to 1 at the first bp downstream the last parSF binding repeat after background subtraction, is displayed over 14-Kbp on the right side of parSF. Monte Carlo simulations and analytic formula are represented in red and dotted black lines, respectively. MC simulations were performed with a Freely-Jointed Chain of linear length L=15-Kbp and a cluster radius σ=75nm. The two other parameters, the Kuhn length a=10-bp and the total number of proteins on the F plasmid Nt=360 (related to the normalization constant of the protein concentration κ=0.41) were fitted from the ChIP-seq dat parSF inserted at the xylE locus on E. coli chromosome fro DLT207
Figure 3(A) The formation of secondary ParBF-DNA complexes requires the box II motif. EMSA were performed with a 144-bp 32P-labelled DNA fragments (C144) carrying a single 16-bp parS binding motif. Reaction mixtures containing 100 µg.ml-1 sonicated salmon sperm DNA were incubated in the absence (-) or the presence of increasing concentrations (grey triangle; 10, 30, 100, 300, and 1000 nM) of ParBF or ParBF-3R*. Positions of free and bound probes are indicated on the left. B1 represents complexes involving the specific interaction on the 16-bp binding site, while B"2 and B"3 complexes represent secondary complexes involving the parSF site with one or two additional nsDNA-binding interactions, respectively (Sanchez et al,(B) ParBF cluster formation requires the box II motif. Epifluorescence microscopy of ParBF-3R*-mVenus from DLT3566 is displayed as in Fig. 1D. White bars: 1 µm(C) ParBF in vivo DNA binding in the vicinity of parSF sites requires the box II motif. ChIP-seq was performed on DLT3726 carrying parSF in the xylE chromosomal locus and expressing ParBF-3R* variant. ParBF-3R* DNA binding profile displayed the number of nucleotide reads as a function of the E. coli genomic coordinates. The peak at parSF covered approximately 950-bp, which corresponds to the 402-bp between the 1st and 10th specific binding sites and ~280-bp on each sides (representing the average size of the DNA library; see Appendix Fig. S3E). No ParBF-3R* enrichment was found on parSF-flanking DNA and elsewhere on the chromosome. Inset, zoom in on the right side of parSF over 5-Kbp with the ParB density, normalized to 1 at the first bp after the last parS binding repeat, plotted as a function of the distance from parSF. Note that a highly similar DNA binding pattern is obtained with ParBF -3R*-mVenus (strain DLT3566; Appendix Fig. S3C)
Figure 6ParBF exchange between foci was measured by FRAP an from two-foci cell of DLT1215 carrying pJYB234 A- Representative images of a photobleached cell during a FRAP experiment. The 488 nm laser was pulsed (Bleach) on one of the two foci at ~2.4 sec (black arrow). Red and blue arrows correspond to the bleached and unbleached focus, respectively. Time is indicated in second (upper right). The cell outline is drawn in red. Scale bar: 1 μmParBF exchange between foci was measured by FRAP and FLIM (fluorescence lifetime imaging microscopy) from two-foci cell of DLT1215 carrying pJYB234 B- Quantification of ParBF-mVenus fluorescence intensity over time. The dynamics of fluorescence intensity is shown from averaging 18 independent measurements of the bleached (FRAP, red line) and unbleached (FLIM, blue line) foci. Foci fluorescence intensity in each experiment was normalized to the average intensity of each focus before photobleaching
Figure 1Human DCs were incubated with a non-cytolytic dose (0.2 μg/ml) of purified PLY for 45 min. Immunofluorescence staining shows that PLY (green) co-localize with MRC-1 in DCs and EEA-1 (purple, early endosomes). All scale bars, 5 μm. Images are representative of three independent experiments.Human DCs were incubated with a non-cytolytic dose (0.2 μg/ml) of purified LLO for 45 min. Immunofluorescence staining shows that LLO (green) co-localize with MRC-1 (red) in DCs and EEA-1 (purple, early endosomes). All scale bars, 5 μm. Images are representative of three independent experiments.Human DCs were incubated with a non-cytolytic dose (0.2 μg/ml) of purified SLO for 45 min. Immunofluorescence staining shows that SLO (green) co-localize with MRC-1 (red) in DCs and EEA-1 (purple, early endosomes). All scale bars, 5 μm. Images are representative of three independent experiments.
Figure 3(A) ELISA showing the dose-dependent binding of plate-bound MRC-1 peptides P2, P3, and the control peptides CP1 and CP2 to PLY (0-0.5 μM). BSA was used as negative control to show the binding specificity. Data are mean ± s.e.m. of two independent experiments, each containing three replicates per condition.(B) Hemolysis assay (n=4) of 1 μg/ml purified PLY in the presence of increasing concentrations of MRC-1 peptides, P2, scrambled P2, P3 and control peptide CP2(1-1000 μM). Data represent mean ± s.e.m. * denotes P < 0.05 by one-way ANOVA with Dunnett's post hoc test for multiple comparisons. Exact P values are shown in Appendix Table S4.(C) LDH cytotoxicity assay in human THP-1 macrophages stimulated with purified PLY, LLO or SLO (0.5 μg/ml) in the presence or absence of 100 μM peptides P2, scrambled P2, P3 or control peptide CP2 for 18 h. Cholesterol (100 μM) was used as positive control to inhibit hemolysis. Data are mean ± s.e.m from 4 independent experiments. **** denotes P< 0.0001 by two-way ANOVA with Bonferroni post hoc test for multiple comparisons. n.s. denotes not significant. Exact P values are shown in Appendix Table S4.(D) Binding of FITC-labelled peptides P2 and CP2 to wild-type pneumococci, TIGR4 (T4) and isogenic PLY mutant (T4Δply) was visualized by fluorescence microscopy. Scale bars, 10 μm. In magnified images, scale bars, 1 μm. Images are representative of three independent experiments.(E) The hemolytic activity of wild-type pneumococci, TIGR4 (T4) and PLY mutant, T4Δply in the presence of 100 μM peptide P2 and CP2. Data are the mean ± s.e.m. of three independent experiments. *** denotes P < 0.001 by one-way ANOVA with Bonferroni post hoc test for multiple comparisons. n.s. denotes not significant. Exact P values are shown in Appendix Table S4.
Figure 4(A) IL-8 released by human THP-1 macrophages stimulated with purified PLY, LLO or SLO (0.5 μg/ml) in the presence or absence of 100 μM peptides P2, P3 or control peptide CP2 for 18 h. Cholesterol (100 μM) was used as positive control to inhibit hemolysis. Data are mean ± s.e.m from three independent experiments. **** denotes P< 0.0001 by two-way ANOVA with Bonferroni post hoc test for multiple comparisons. n.s. denotes not significant. Exact P values are shown in Appendix Table S4.(C) 3D volume images of the GFP-lung epithelial models at 1 h and 3 h post stimulation with 1 μg/ml PLY in the presence or absence of 100 μM peptide P2 or the control peptide CP2. Images are representative of two independent experiments with n=3 models/condition.(D) Invasion of wild-type pneumococci T4 (TIGR4) or its isogenic PLY mutant T4Δply into the lung epithelial models (n=3/condition) in the presence or absence of 100 μM peptide P2 or the control peptide CP2 at 2h post infection was measured using CFU viability assay following gentamicin killing of extracellular bacteria. Anti-PLY was used as control to test the effect of blocking PLY. Data in d and e are mean ± s.e.m. of n=3 models/condition from two independent experiments. % bacterial entry = (bacteria uptaken/input) x100. ** denotes P < 0.01 by one-way ANOVA with Dunnett's post hoc test for multiple comparisons. n.s. denotes not significant. Exact P values are shown in Appendix Table S4.(E) Human DCs were infected with type 4 and type 2 pneumococci, T4 and D39, respectively, at MOI of 10 in the presence or absence of 100 μM peptides, P2 or CP2, and intracellular bacteria were counted at 3 h post infection following gentamicin killing of extracellular bacteria. Cytochalasin D (0.5 mM) was used as negative control to inhibit phagocytosis. Anti-PLY was used as control to test the effect of blocking PLY. Data are mean ± s.e.m. of three independent experiments. **** denotes P < 0.0001 by two-way ANOVA with Bonferroni post hoc test for multiple comparisons. n.s. denotes not significant. Exact P values are shown in Appendix Table S4.(F) DCs were infected with the unencapsulated pneumococcal strain T4R in the presence of 100 μM peptides, P2 or CP2 at MOI of 10 for 2 h. Immunofluorescence microscopy images show that in DCs treated with peptide P2 (but not the control peptide CP2), intracellular T4R (green) do not co-localize with MRC-1 (red), but with the autophagy protein LC3B (cyan). Images are representative of three independent experiments. Scale bars, 10 μm. In magnified images, scale bars, 5 μm. Arrows indicate regions of co-localization of intracellular T4R with MRC-1 and LC3B. (G) Quantification of percentage of intracellular S. pneumoniae (n=50) in infected DCs that co-localize with MRC-1 and LC3B. Data are mean±s.e.m from two independent experiments. **** denotes P <0.0001 by two-way ANOVA with Bonferroni post hoc test for multiple comparisons. n.s. denotes not significant. P values are shown in Appendix Table S4.
Figure 5(A) Survival percentage of 3-4 dpf zebrafish embryos (n ≥156) upon infection with S. pneumoniae T4 alone or its isogenic PLY mutant, T4Δply. Injection with E3 growth medium served as mock control. *** denotes P < 0.0005 and **** denotes P < 0.0001 by Mantel Cox test. Exact P values are shown in Appendix Table S4.(B) Zebrafish survival percentage upon infection with T4 alone or together with peptide P2 or CP2 or P2-conjugated CaP NPs (P2-NPs). *** denotes P < 0.0005 and **** denotes P < 0.0001 by Mantel Cox test. Exact P values are shown in Appendix Table S4.(C) Survival of mice (n=10) upon intranasal infection with 2x106 CFU of S. pneumoniae T4 together with peptide P2 or CP2 or P2-NPs over 3 days post infection. Infected mice were checked twice daily in the morning at 9 am (early check) and in evening at 7 pm (late check) for clinical symptoms. Unloaded NPs and the isogenic PLY mutant strain (T4Δply) served as negative controls. * denotes P < 0.05 and ** denotes P < 0.005 by Mantel Cox test. Exact P values are shown in Appendix Table S4.Bacterial load in the lungs of infected mice (n=10) were measured post sacrifice. Data represent mean ± s.e.m. * denotes P < 0.05, ** denotes P < 0.01 and **** denotes P <0.0001 by one-way ANOVA with Bonferroni's post hoc test for multiple comparisons. n.s. denotes not significant. Exact P values are shown in Appendix Table S4.levels of pro-inflammatory cytokines TNF-α in the lungs of infected mice (n=10) were measured post sacrifice. Data represent mean ± s.e.m. * denotes P < 0.05, ** denotes P < 0.01 and **** denotes P <0.0001 by one-way ANOVA with Bonferroni's post hoc test for multiple comparisons. n.s. denotes not significant. Exact P values are shown in Appendix Table S4.levels of pro-inflammatory cytokines IL-12 in the lungs of infected mice (n=10) were measured post sacrifice. Data represent mean ± s.e.m. * denotes P < 0.05, ** denotes P < 0.01 and **** denotes P <0.0001 by one-way ANOVA with Bonferroni's post hoc test for multiple comparisons. n.s. denotes not significant. Exact P values are shown in Appendix Table S4.
Figure 1C-E. Luciferase reporter assay in HeLa cells using the synthetic miR-Control or miR-182-3p in combination with the wild type (C) or the mutant 3'UTR of TRF2 construct (D) or the wild type 3'UTR of TRF1 (E). Data information: data are shown as mean ± SD. Three independent experiments were performed (n=3). P values are determined by Mann-Whitney test.F,G. Western blotting for TRF2 expression in Telomerase Positive (HeLa, HCT116, MDA-MB-231, MDA-MB-436) and ALT positive (U2-OS, Saos-2) cells transiently transfected with miR-Control or miR-182-3p. Upper panel shows the quantification of TRF2 expression. Bottom panel, representative images are shown, actin was used as loading control. Data information: data are shown as mean ± SD. Three independent experiments were performed (n=3). P values are determined by Mann-Whitney test.H. U2-OS cells transiently transfected with the miR-Control, miR-182-3p or miR-182-3p inhibitor were assayed by quantitative immunofluorescence for TRF2 three days post-transfection. Left panel, representative images. Scale bar: 10µm. Right panel, quantification of TRF2 fluorescence intensity. a.f.u. arbitrary fluorescence units. N=number of analysed nuclei. Red bar indicates mean value. Data information: Three independent experiments were performed (n=3). P values are determined by Student's t-test; for (H)I. U2-OS cells transfected as described in (H) were assayed by immuno-fluorescence combined with telomeric FISH. Left panel, representative images of co-localizations between TRF2 and telomeres (white arrowheads). Scale bar: 10µm. Right panel, co-localizations were analysed using imageJ software. N=number of analysed nuclei. Data information: For I, data are shown as mean ± SD. Three independent experiments were performed (n=3). P values are determined by Mann-Whitney test.
Figure 2A. Immunofluorescence analysis of γH2AX combined with telomeric FISH (TIFs) was performed in MDA-MB-231 cells transfected with the indicated miRNAs or siRNAs. The mean number of TIFs per nucleus was analysed. B. Representative images and enlargements of co-localizations (white arrowheads) relative to the experiment described in A. Scale bar: 10µm. Data information: For A data are shown as mean ± SD. Three independent experiments were performed (n=3). P values are determined by unpaired two-tailed t test. At least 60 nuclei were analysed for each experimental condition. All the experiments were performed three days post-transfection with the indicated miRNAs or siRNAs.C. Immunofluorescence analysis of γH2AX combined with a SatIII FISH probe (PIFs) was performed in MDA-MB-231 cells transfected with the indicated miRNAs or siRNAs. The γH2AX positive cells with ≥1 PIFs per nucleus were analysed. D. Representative images of co-localizations (white arrowheads) relative to the experiment described in C. Scale bar: 10µm. Data information: For C, data are shown as mean ± SD. Three independent experiments were performed (n=3). P values are determined by unpaired two-tailed t test. At least 60 nuclei were analysed for each experimental condition. All the experiments were performed three days post-transfection with the indicated miRNAs or siRNAs.E. Quantification of TIFs in MDA-MB-231 cells over-expressing TRF2 or an empty vector (pBabe), transfected with indicated miRNAs. The mean number of TIFs per nucleus was quantified. F. Representative images and enlargements relative to the experiment described in E. White arrowheads indicate co-localizations events. Scale bar: 10µm. Data information: data are shown as mean ± SD. Three independent experiments were performed (n=3). P values are determined by unpaired two-tailed t test. At least 60 nuclei were analysed for each experimental condition. All the experiments were performed three days post-transfection with the indicated miRNAsG. Quantification of PIFs in MDA-MB-231 cells over-expressing TRF2 or an empty vector (pBabe), transfected with indicated miRNAs. The γH2AX positive cells with ≥1 PIFs per nucleus were analysed. H. Representative images relative to the experiment described in G. White arrowheads indicate co-localizations events. Scale bar: 10µm. Data information: For G data are shown as mean ± SD. Three independent experiments were performed (n=3). P values are determined by unpaired two-tailed t test. At least 60 nuclei were analysed for each experimental condition. All the experiments were performed three days post-transfection with the indicated miRNAs
Figure 3A,B. MDA-MB-436 and MDA-MB-231 cells underwent two rounds of transfection with miR-Control, miR-182-3p or miR-182-3p inhibitor. Starting from the day of the second transfection, cell confluence was monitored by Incucyte every 24h up to a maximum of 3 days. The percentage of cell confluence was analysed. Data information: For A,B data are shown as mean ± SEM. three independent experiments were performed (n=3). P values are determined by unpaired two-tailed t test.C,D. Cell number of MDA-MB-436 (C) and MDA-MB-231 (D) cells and TRF2 expression were analysed by automatic cell count and by western blotting at the end of the experiment described in A and B. Actin was used as loading control. Data information: For C,D data are shown as mean ± SD. three independent experiments were performed (n=3). P values are determined by unpaired two-tailed t test.E. Two-dimensional scatter plots of Annexin V analysis performed in MDA-MB-436 at the end of the second cycle of transfection with miR-Control, miR-182-3p or miR-182-3p inhibitor. Red boxes indicate early and late apoptotic cells. F. Quantification of Annexin V positive cells (%) of experiment described in E. G. Two-dimensional scatter plots of Annexin V analysis performed in MDA-MB-231 as described in E. H. Quantification of Annexin V positive cells (%) of experiment described in G. Data information: For F,H data are shown as mean ± SD. P values are determined by unpaired two-tailed t test. For F, H two different biological replicates were performed.I,J. MDA-MB-436 cells over-expressing TRF2 or an empty vector (pBabe) were transiently transfected with indicated miRNAs and cell count (I) or apoptosis (J) analysis was performed 72h post-transfection. Data information: For ,I,J, data are shown as mean ± SD. For I, three independent experiments were performed (n=3). P values are determined by unpaired two-tailed t test. For J, two different biological replicates were performed.
Figure 4A. Western blotting for TRF2 expression in BJ cells transiently transfected with miR-Control or miR-182-3p. The graph represents the quantification of three independent experiments. Representative images are shown, actin was used as loading control. Unspecific bands are indicated with (*).B, C. Mean of γH2AX foci per nucleus was analysed in BJ cells 72h post-transfection with the indicated miRNAs. Representative images of γH2AX foci are shown in C. Data information: student t test was used to calculate statistical significance. Scale bars (10µm). P values are indicated.D. Immunofluorescence analysis of γH2AX combined with a telomeric FISH probe (TIFs) was performed in BJ cells 72h post-transfection with the indicated miRNAs. Left panel: the mean number of TIFs per nucleus was analysed. Right panel: representative images and enlargements of co-localizations. Data information: a student t test was used to calculate statistical significance. Scale bars (10µm). P values are indicated.E. Cells number of BJ cells was analysed by automatic cell count at the end of the second round of transfection with miR-Control or miR-182-3p. Data information: a student t test was used to calculate statistical significance. P values are indicated.F. FACS analysis to evaluate cell cycle progression by Propidium Iodide (PI) staining in BJ cells treated as indicated in E.G. β-Galactosidase assay in BJ cells after two rounds of transfection with mimic miR-Control or miR-182-3p. Left panel: analysis of β-Galactosidase positive cells. Right panel: representative images. Data information: a student t test was used to calculate statistical significance. P values are indicated.H-J. IL-6 (H), CXCL1 (I), IL-8 (J) factors were analysed by ELISA to evaluated the Senescence-associated secretory phenotype (SASP) in BJ cells treated as indicated in G. Data information: a student t test was used to calculate statistical significance. P values are indicated.