EMBO/SourceData huggingface dataset:
Figure 2A. InlK amino acid sequence. The signal sequence is underlined and the different regions of leucine rich repeats (LRRs) are outlined. The consensus pentapeptide LPXTG at the C-terminal end is boxed.B. Detection by immunofluorescence microscopy of InlK over-expressing in L. monocytogenes EGD-e (WT), ΔinlK, WT+pADc-inlK, ΔinlK+pPRT-inlK and the ΔsrtA mutant over-expressing inlK (ΔsrtA+pPRT-inlK) grown in BHI medium using the rabbit polyclonal anti-InlK antibody. InlK was detected at the surface of InlK over-expressing bacteria (WT+pADc-inlK and ΔinlK+pPRT-inlK), whereas it was undetectable at the surface WT bacteria or at the surface of the ΔstrA mutant over-expressing inlK.C. Detection of InlK by Western blot on total lysates of L. monocytogenes EGD-e (WT), ΔinlK and ΔinlK+pPRT-inlK grown in BHI using the rabbit polyclonal anti-InlK antibody. Decreased concentrations of recombinant purified InlK were used as a positive control.D. Detection of secreted InlK in the supernatant of ΔsrtA mutants over-expressing InlK. Western blotting was carried out on trichloroacetic acid precipitates of ΔsrtA and ΔsrtA+pPRT-inlK culture (OD600 = 1) supernatants using the rabbit polyclonal anti-InlK antibody.E. Detection of purified recombinant InlK protein with rabbit polyclonal anti-live Listeria antibody, rabbit polyclonal anti-killed Listeria antibody, rabbit polyclonal anti-InlK and a rabbit pre-immune serum. InlK was detected only with the rabbit polyclonal anti-live Listeria antibody indicating that it is expressed during the in vivo infectious process. BSA was used as control protein. Two different amounts of proteins were tested (500 ng and 200 ng) to access signal specificity.
Figure 3A. Bacterial pull-down of purified GST-MVP with the L. monocytogenes strains WT+pPRT-empty, ΔinlK+pPRT-empty, ΔinlK+pPRT-inlK and WT+pPRT-inlJ. GST-MVP bound to InlK over-expressing bacteria (ΔinlK+pPRT-inlK) but not to other bacteria. GST-ScarA was used as control of the specificity of the MVP precipitation by InlK over-expressing bacteria.B. Bacterial pull-down of MVP-GFP from transfected HeLa cell lysates with the L. monocytogenes strains WT+pPRT-empty, ΔinlK+pPRT-empty, ΔinlK+pPRT-inlK and WT+pPRT-inlJ. MVP-GFP bound to InlK over-expressing bacteria (ΔinlK+pPRT-inlK) but not to other bacteria.C. Co-immunoprecipitation (Co-IP) of purified InlK (20 µg) with endogenous MVP of HT29 cells. The right panel shows anti-MVP co-IP performed on HT29 cell lysates. The left panel shows the control anti-MVP co-IP performed on lysis buffer.D. Detection of MVP recruitment at the surface of InlK over-expressing bacteria. HeLa cells were transfected with MVP-GFP (green), infected with L. monocytogenes EGD-e wild-type (WT), ΔinlK or ΔinlK+pPRT-inlK for 4 h, fixed for fluorescence light microscopy, and stained with anti-Listeria antibodies (red). Inset regions are magnified. The scale bar represents 1 µm.
Figure 4A. Detection of MVP recruitment at the surface of intracellular InlK over-expressing bacteria. HeLa cells were transfected with MVP-GFP (red), infected with InlK expressing Listeria (ΔinlK+pPRT-inlK) for 4 h, fixed for fluorescence light microscopy. Intra- (only green) and extracellular (cyan = green+blue) bacteria were differentially stained with anti- Listeria antibody (cf Material and Methods). Inset regions are magnified. Arrows indicate another intracellular bacterium which recruit MVP-GFP. The scale bar represents 1 µm. The right panel represents the quantification of the intracellular bacteria that recruit MVP (mean%±SEM%) shown in the left panel. Statistical analyses were performed on the results of 3 independent experiments using the Student's t test. No significant difference was found between the 4 time points.B. Detection of MVP recruitment at the surface of intracytosolic InlK over-expressing bacteria. HeLa cells were transfected with MVP-tomato (red) and YFP-CBD (green), infected with InlK over-expressing Listeria (ΔinlK+pPRT-inlK) for 4 h, fixed for fluorescence light microscopy and stained with phalloidin (blue). MVP positive bacteria were also labeled with YFP-CBD revealing that MVP was recruited by intracytosolic bacteria after the lysis of the internalization vacuole. Inset regions are magnified. The scale bar represents 1 µm.C. Kinetics of MVP and actin recruitment at the surface of InlK over-expressing bacteria. HeLa cells were transfected with MVP-tomato (red) and actin-GFP (green), infected with InlK over-expressing Listeria (ΔinlK+pPRT-inlK) for 4 h, and prepared for real-time video microscopy. Image series were collected every 15 min for 2 h. The left part shows an MVP positive bacterium that never recruits actin. The right part shows MVP replacement by actin around the bacterium. No colocalization of MVP-Tomato and actin-GFP was detected. Time is indicated along the Y axis. The entire image sequence can be viewed as Video S1.
Figure 5A. Impaired recruitment of p62 to MVP positive Listeria. HeLa cells were transfected with MVP-GFP (green), infected with InlK over-expressing Listeria (ΔinlK+pPRT-inlK) for 4 h, fixed for fluorescence light microscopy, and stained with phalloidin (blue) and anti-p62 antibody (red). Inset regions are magnified. Arrows indicate independent bacteria The scale bar represents 1 µm. The vast majority of MVP-positive bacteria were completely devoid of anti-p62 labeling (95.1±2.0%; mean ± SEM from n = 3 experiments) but 4.9±2.0% (mean ± SEM from n = 3 experiments) were stained at one pole with MVP and at the other pole with p62.B. Impaired recruitment of GFP-LC3 on MVP positive Listeria. HeLa cells were transfected with MVP-tomato (red) and GFP-LC3 (green), infected with InlK over-expressing Listeria (ΔinlK+pPRT-inlK) for 4 h, fixed for fluorescence light microscopy, and stained with phalloidin (blue). Inset regions are magnified. The scale bar represents 1 µm. MVP and/or actin positive bacteria were never recognized by GFP-LC3. Arrows point to bacteria at different steps of the infection process: 1) InlK over-expressing bacterium is totally covered by MVP; 2) bacterium is partially labeled with MVP (at the poles) and actin (at the center); 3) bacterium is completely covered by actin; 4) bacterium is enclosed in an GFP-LC3 positive autophagosome.C. Kinetics of autophagy escape for MVP positive Listeria. Jeg3 cells were transfected with MVP-tomato (red) and GFP-LC3 (green), infected with InlK over-expressing Listeria (ΔinlK+pPRT-inlK) for 4 h, and prepared for real-time video microscopy. Image series were collected every 5 min for 2 h. Time is indicated along the Y axis. The left panel shows that the GFP-LC3 membranous aggregate detaches from the MVP positive Listeria. The entire image sequence can be viewed as Video S2. The right panel shows that the GFP-LC3 membranous aggregate on MVP positive bacteria does not lead to an autophagosome formation, whereas those bacteria efficiently divided. The entire image sequence can be viewed as Video S3.D. Impaired recruitment of GFP-LC3 and ubiquitin to MVP positive ΔactA Listeria. HeLa cells were transfected with MVP-tomato (red) and GFP-LC3 (green), infected with InlK over-expressing ΔactA (ΔactA+pADc-inlK) for 4 h, fixed for fluorescence light microscopy, and stained with anti-ubiquitin antibody (blue) and DAPI (white). Inset regions are magnified. The scale bar represents 1 µm.E. LC3 levels in infected RAW 267.4 macrophages. Left panel: RAW 267.4 macrophages were infected with L. monocytogenes EGD (WT), ΔactA or ΔactA+InlK for 6 h. Cell total lysates were immunobloted for LC3 and actin. Western blot is representative from 3 independent experiments. Right panel: Quantification of the relative LC3-II level (mean ± SEM) shown in the left panel. Statistical analyses were performed on the results of 3 independent experiments using the Student's t test. P values of <0.05 were considered statistically different.
Figure 6A. InlK and ActA expression in Listeria strains used for survival assays. Total lysates of L. monocytogenes EGD-(pADc-GFP), EGD-(pADc-inlK), ΔactA-(pADc-GFP) and ΔactA-(pADc-inlK) grown in BHI were immunoblotted using anti-ActA and anti-InlK antibodies.B. Intracellular survival of EGD-(pADc-GFP), EGD-(pADc-inlK), ΔactA-(pADc-GFP) and ΔactA-(pADc-inlK) in RAW 267.4 macrophages. Statistical analyses were performed on the results of 3 independent experiments using the Student t test. P values of <0.05 were considered statistically different and are labeled here as *.C. Intracellular survival of ΔactA-(pADc-GFP) and ΔactA-(pADc-inlK) in MVP-GFP transfected Jeg3 cells. Statistical analyses were performed on the results of 3 independent experiments using the Student's t test. P values of <0.05 were considered statistically different and are labeled here as *.D. Intracellular survival of ΔactA-(pADc-GFP) and ΔactA-(pADc-inlK) in MVP-GFP transfected HeLa cells. Statistical analyses were performed on the results of 3 independent experiments using the Student's t test. P values of <0.05 were considered statistically different and are labeled here as *.E. MVP levels in RAW 267.4 macrophages treated with MVP-siRNA. Western blot is representative from 3 independent experiments.F. Intracellular survival of ΔactA-(pADc-GFP) and ΔactA-(pADc-inlK) in MVP knock-down RAW 267.4 macrophages. Statistical analyses were performed on the results of 3 independent experiments using the Student t test. P values of <0.05 were considered statistically different and are labeled here as *.
Figure 1A Double-plotted representative actograms of the indicated genotypes. Flies are monitored in LD for 4 days and then DD for 7 days. Dicer2 (dcr2) is co-expressed to enhance the effects of RNAi. White boxes indicate the light phase and black boxes indicate the dark phase. Gray shades indicate DD. G4, GAL4; U, UAS.B-D The period of DD locomotor rhythms of flies with Nipped-A knocked down and controls. Data information: (B-H) Error bars represent standard error of the mean (SEM). Digits on the bars are the number of flies tested. Percentage of rhythmicity is indicated above the bars. Statistical difference is measured using One-way ANOVA, P<0.001, Tukey's multiple comparison test, *P<0.05, **P<0.01, ***/###P<0.001, * compared with the GAL4 controls; # compared with the UAS controls. White bar indicates UAS or GAL4 controls. Gray bar indicates flies with Nipped-A knocked down. G4, GAL4; U, UAS.E, F Using temperature-sensitive GAL80 system to control Nipped-A RNAi expression. (E) The period of DD locomotor rhythms of flies raised at 18ºC and tested at 29ºC. (F) The period of DD locomotor rhythms of flies raised at 29ºC and tested at 18ºC. Data information: (B-H) Error bars represent standard error of the mean (SEM). Digits on the bars are the number of flies tested. Percentage of rhythmicity is indicated above the bars. Statistical difference is measured using One-way ANOVA, P<0.001, Tukey's multiple comparison test, *P<0.05, **P<0.01, ***/###P<0.001, * compared with the GAL4 controls; # compared with the UAS controls. White bar indicates UAS or GAL4 controls. Gray bar indicates flies with Nipped-A knocked down. G4, GAL4; U, UAS.G, H The period of DD locomotor rhythms of flies treated with RU486 to activate the pdfG4-geneswitch (pdf-GS) driver (G) or vehicle control (H). Data information: (B-H) Error bars represent standard error of the mean (SEM). Digits on the bars are the number of flies tested. Percentage of rhythmicity is indicated above the bars. Statistical difference is measured using One-way ANOVA, P<0.001, Tukey's multiple comparison test, *P<0.05, **P<0.01, ***/###P<0.001, * compared with the GAL4 controls; # compared with the UAS controls. White bar indicates UAS or GAL4 controls. Gray bar indicates flies with Nipped-A knocked down. G4, GAL4; U, UAS.
Figure 2A Plots of relative mRNA abundance vs circadian time (CT) for clock genes determined by qRT-PCR in whole head extracts of Nipped-A RNAi (timG4/+;Udcr2/UNipped-ARNAi-1/+) and control (timG4/+;Udcr2/+) collected on DD1 (tim/cry, n=5; Pdp1ε/per/clk/cyc, n=3; vri, n=6). For each time series, the value of the lowest time point was set to 1.B Western blots of proteins from whole head extracts of Nipped-A RNAi and control flies collected on DD1 and probed with TIM, PDP1ε and PER antibodies. C Quantification of TIM (n=5), PDP1ε (n=3) and PER (n=3) protein levels of blots in (B). TIM, PDP1ε and PER protein levels were normalized to that of HSP70. For each time series, the value of the control at the peak time point was set to 1. D Brains from Udcr2/+;cryG4-16/+ and Udcr2/+;cryG4-16/UNipped-ARNAi flies collected at CT0, 4, 8, 12, 16, 20 on DD1 were immunostained with TIM (green) , PDP1ε (red), PER (green) and PDF (red or green) antisera. The scale bar represents 10µm. E Quantification of TIM, PDP1ε and PER protein levels in the s-LNvs of images in (D) (TIM: CT8: Udcr2/+;cryG4-16/+, n=89; Udcr2/+;cryG4-16/UNipped-ARNAi, n=58; CT20: Udcr2/+;cryG4-16/+, n=130; Udcr2/+;cryG4-16/UNipped-ARNAi, n=80; PDP1ε: CT4: Udcr2/+;cryG4-16/+, n=46; Udcr2/+;cryG4-16/UNipped- RNAi, n=26; CT16: Udcr2/+;cryG4-16/+, n=65; Udcr2/+;cryG4-16/UNipped-ARNAi, n=41; PER: CT0: Udcr2/+;cryG4-16/+, n=90; Udcr2/+;cryG4-16/UNipped-ARNAi, n=58; CT12: Udcr2/+;cryG4-16/+, n=86; Udcr2/+;cryG4-16/UNipped-ARNAi, n=64).
Figure 3A, B The period of DD locomotor rhythm of Nipped-A RNAi flies over-expressing tim (A) or carrying heterozygous tim01 mutation (B). Ptim is a tim cDNA construct driven by tim promoter. Data information: Error bars represent SEM. Digits on the bar are the number of flies tested. Percentage of rhythmicity is indicated above the bars. Statistical difference is measured using one-way ANOVA, P<0.001, Tukey's multiple comparison test, *P<0.05, **P<0.01, ***/###/+++/$$$P<0.001, * compared with the G4 control, # compared with the UAS control, + compared with the Nipped-A RNAi flies, $ compared with the over-expression or mutant flies. White bar indicates UAS or GAL4 controls. Dashed bar indicates flies with genetically manipulated core clock gene. Gray bar indicates flies with Nipped-A knocked down. Checked bar indicates flies with both genetically manipulated core clock gene and Nipped-A knocked down. G4, GAL4; U, UAS.C, D The period of DD locomotor rhythm of Nipped-A RNAi flies over-expressing Pdp1ε (C) or carrying heterozygous Pdp1ε3135 mutation (D). Data information: Error bars represent SEM. Digits on the bar are the number of flies tested. Percentage of rhythmicity is indicated above the bars. Statistical difference is measured using one-way ANOVA, P<0.001, Tukey's multiple comparison test, *P<0.05, **P<0.01, ***/###/+++/$$$P<0.001, * compared with the G4 control, # compared with the UAS control, + compared with the Nipped-A RNAi flies, $ compared with the over-expression or mutant flies. White bar indicates UAS or GAL4 controls. Dashed bar indicates flies with genetically manipulated core clock gene. Gray bar indicates flies with Nipped-A knocked down. Checked bar indicates flies with both genetically manipulated core clock gene and Nipped-A knocked down. G4, GAL4; U, UAS.E, F The period of DD locomotor rhythm of Nipped-A RNAi flies over-expressing per (E) or carrying perL mutation (F). Data information: Error bars represent SEM. Digits on the bar are the number of flies tested. Percentage of rhythmicity is indicated above the bars. Statistical difference is measured using one-way ANOVA, P<0.001, Tukey's multiple comparison test, *P<0.05, **P<0.01, ***/###/+++/$$$P<0.001, * compared with the G4 control, # compared with the UAS control, + compared with the Nipped-A RNAi flies, $ compared with the over-expression or mutant flies. White bar indicates UAS or GAL4 controls. Dashed bar indicates flies with genetically manipulated core clock gene. Gray bar indicates flies with Nipped-A knocked down. Checked bar indicates flies with both genetically manipulated core clock gene and Nipped-A knocked down. G4, GAL4; U, UAS.
Figure 4A Plots of relative mRNA abundance of Nipped-A in whole head extracts of w1118 flies in LD and DD1 determined by qRT-PCR (n=3).B Left panel: Western blots of proteins from whole heads of w1118 and Nipped-A RNAi flies collected during LD or DD1 and probed with NIPPED-A antibody. Right panel: quantification of NIPPED-A protein levels of blots in the left panel (LD, n=3; DD1, n=5).C Chromatin immunoprecipitation (ChIP) assays to detect NIPPED-A binding at E-box, transcription start site (TSS) and gene body of tim, Pdp1ε and per using w1118 flies (n=3). Data information: Error bars represent SEM. Two-way ANOVA, significant effect between NIPPED-A and IgG were found for tim E-box (P<0.001), Pdp1ε E-box (P<0.001), per E-box (P<0.001), tim TSS (P<0.001), Pdp1ε TSS (P<0.001), per TSS (P<0.001), tim gene body (P<0.001), Pdp1ε gene body and per gene body (P<0.001). Student's t-test, *P < 0.05, **P < 0.01, ***P < 0.001. G4, GAL4; U, UAS.
Figure 5A Plots of relative pre-mRNA abundance of tim (n=5) and Pdp1ε (n=3) determined by qRT-PCR in the whole head extracts of Nipped-A RNAi (timG4/+;Udcr2/UNipped-ARNAi-1) and control (timG4/+;Udcr2/+) flies during DD1.B ChIP assays to detect ub-H2B binding at E-box, TSS and gene body of tim, Pdp1ε, per and clk in Nipped-A RNAi (timG4/+;Udcr2/UNipped-ARNAi-1) and control (timG4/+;Udcr2/+) (n≥3). Data information: Student's t-test, *P < 0.05. Two-way ANOVA, significant effect between ub-H2B and IgG were found for all genomic regions tested (P<0.001). Significant effect of genotypes were found for tim E-box (P<0.05), Pdp1ε E-box (P<0.01), tim TSS (P<0.01) and Pdp1ε TSS (P<0.001).
Figure 6A, B The period (A) and power (B) of DD locomotor rhythms of flies with not knocked down and controls. Digits on the bar are the number of flies tested. Percentage of rhythmicity is indicated above the bars. Statistical difference is measured using one-way ANOVA, P<0.001, Tukey's multiple comparison test, **P<0.01, ***/###/+++/$$$P<0.001, * compared with the G4 control, # compared with the UAS control, + compared with the Nipped-A RNAi flies, $ compared with the not overexpression flies. White bar indicates UAS or GAL4 controls. Dashed bar indicates flies with genetically manipulated not. Gray bar indicates flies with Nipped-A knocked down. Checked bar indicates flies with both genetically manipulated not and Nipped-A knocked down.C Plots of relative mRNA abundance vs CT for clock genes determined by qRT-PCR in whole head extracts of not RNAi (timG4/+;Udcr2/UnotRNAi) and control (timG4/+;Udcr2/+) collected on DD1 (n=5).D ChIP assays to detect ub-H2B binding at E-box, TSS and gene body of tim and Pdp1ε in not RNAi (timG4/+;Udcr2/UnotRNAi) and control (timG4/+;Udcr2/+) (n=3). Student's t-test, *P < 0.05, **P < 0.01, ***P < 0.001. Statistical difference is measured using two-way ANOVA, P<0.001, significant effect of genotypes were found for tim E-box (P<0.01), Pdp1ε E-box (P<0.05), tim TSS (P<0.05) and Pdp1ε TSS (P<0.001) and tim gene body (P<0.01). G4, GAL4; U, UAS.E, F The period of DD locomotor rhythm of flies when knocking down Nipped-A and over-expressing not. Digits on the bar are the number of flies tested. Percentage of rhythmicity is indicated above the bars. Statistical difference is measured using one-way ANOVA, P<0.001, Tukey's multiple comparison test, **P<0.01, ***/###/+++/$$$P<0.001, * compared with the G4 control, # compared with the UAS control, + compared with the Nipped-A RNAi flies, $ compared with the not overexpression flies. White bar indicates UAS or GAL4 controls. Dashed bar indicates flies with genetically manipulated not. Gray bar indicates flies with Nipped-A knocked down. Checked bar indicates flies with both genetically manipulated not and Nipped-A knocked down.G The period of DD locomotor rhythm of flies co-expressing Nipped-A RNAi and not RNAi. Digits on the bar are the number of flies tested. Percentage of rhythmicity is indicated above the bars. Statistical difference is measured using one-way ANOVA, P<0.001, Tukey's multiple comparison test, **P<0.01, ***/###/+++/$$$P<0.001, * compared with the G4 control, # compared with the UAS control, + compared with the Nipped-A RNAi flies, $ compared with the not overexpression flies. White bar indicates UAS or GAL4 controls. Dashed bar indicates flies with genetically manipulated not. Gray bar indicates flies with Nipped-A knocked down. Checked bar indicates flies with both genetically manipulated not and Nipped-A knocked down.
Figure 1(A) siRNA-treated BMDMs were infected for 16 hours with S. Typhimurium (orgA-) and LDH and IL-1β release were measured.(B) Cell death (LDH) and IL-1β release evaluation in WT, Irgm2-/-, GBPChr3-/- and Casp11-/- BMDMs infected for 16 hours with different Gram-negative bacteria (MOI 25).(C) Western blot examination of processed caspase-1 (p20) and gasdermin-D (p30) in supernatants and pro-caspase-1 (p45), pro-gasdermin-D (p55) and GAPDH in cell lysates of WT and Irgm2-/- BMDMs infected for 16 h with different Gram-negative bacterial strains.(D) IL-1β and cell death (% LDH) evaluation in immortalized WT, Irgm2-/-, Casp11-/- and Casp11-/-Irgm2-/- (referred as sgIrgm2) BMDMs after 16 hours of E. coli, S. Typhimurium orgA- and OMV treatment.(E) Cell death (% LDH) evaluation in IFNγ-primed WT, Irgm2-/- and Casp11-/- BMDMs 4 hours after electroporation or not with 1µg of E. coli LPS.(F-H) Survival of WT, Casp11-/- and Irgm2-/- mice primed with 100µg poly(I:C) for 6 hours and injected (i.p.) with 5mg/k-1 LPS or 5 and 25 µg of OMVs (n=6 animals per condition).
Figure 2(A) Measure of LDH and IL-1β release in WT, GBPChr3-/- and Casp11-/- BMDMs were Irgm2 was knocked down 16 hours after exposure to 2,5 µg/2.105 cells of OMVs. Si Scramble (siScr.) refers to RNAi pools with non-targeting sequences.(B) Cell death (LDH) and IL-1β release evaluation in Irgm2-silenced WT and GBPChr3-/- BMDMs infected for 16 hours with either S.Tm orgA- or F. novicida (MOI 25). Si Scramble (siScr.) refers to RNAi pools with non-targeting sequences.(C) Florescence microscopy and associated quantifications of GBP-2 (green) recruitments to intracellular S. Tm orgA--mCherry (MOI 10, red) in IFNγ-primed WT and Irgm2-/-BMDMs. Nucleus was stained with Hoechst (blue). Confocal images shown are from one experiment and are representative of n=3 independent experiments; scale bars 5 µm. For quantifications, the percentage of GBP-associated bacteria was quantified and 'n=' refers to the number of intracellular bacteria counted in each experiment; quantifications from n=3 independent experiments were then plotted and expressed as mean ± SEM.(D) Confocal fluorescence microscopy images and associated quantifications of caspase-11-C254G-GFP (green) recruitment to S.Tm-mCherry (orgA-, red) in IFNγ-primed iWT, iIrgm2-/-, iGBPChr3-/- and iGBPChr3-/-/sgIrgm2 BMDMs after 8 hours of infection. Nucleus (blue) was stained with Hoescht; scale bar 5µm. For quantifications, the percentage of bacteria positive for caspase-11-C254G-GFP was determined by combining the bacterial counts from n=3 independent experiments and expressed as mean ± SEM. ***p ≤ 0.001 for the indicated comparisons using t-test with bonferroni correction.