EMBO/SourceData huggingface dataset:
Figure 1Wild-type mice have small defined crypts in the small intestine with little nuclearβ-catenin at the bottom of the crypt. The small intestine of AhCreERAPCfl/fl, AhCreERCatnblox(ex3)/lox(ex3) (day 5) or AhCreERGsk3alphafl/fl betafl/fl (day 6) show the crypt-progenitor cell (CPC) phenotype with increased crypt size (red bar) and nuclearβ-catenin (arrows) along the crypt-villus axis. Scale bar, 100 μm.A heterozygous activation of β-catenin (AhCreER Catnblox(ex3)/+) shows no increase in crypt size or nuclear β-catenin at days 5-10. At day 15 post-induction, accumulation of nuclear β-catenin (arrows) becomes evident with a dramatic CPC phenotype at about day 25. Scale bar, 100 μm.Culture of small intestinal crypts of WT and VilCreER Apcfl/fl (or AhCreER Apcfl/fl) mice with/without R-spo1 shows the dependence of the Wnt agonist in WT organoids but not in Apc-deficient spheres. Representative photos were taken at day 5 in culture. Black scale bar, 50 μm.At day 5 post-induction, only crypts from AhCreERCatnblox(ex3)/lox(ex3) but not AhCreERCatnblox(ex3)/+ survive in culture without the addition of R-spo1. At day 10 post-induction, we observed a mixed phenotype of more organoid-like structures in AhCreERCatnblox(ex3)/+ compared to spheres from Catnblox(ex3)/lox(ex3)crypts in the first week of culture. Black scale bar, 50 μm.Quantification of organoids/spheres at day 10 post-induction (N = 2 or 3 mice per genotype, mean of 6 technical replicates per mouse).
Figure 2Table shows that only homozygous activation of β-catenin (Lgr5CreER Catnblox(ex3)/lox(ex3)) or loss of Apc (Lgr5CreER Apcfl/fl) in Lgr5-positive stem cells results in colonic lesions in cohorts, sampled when signs of sickness were apparent. There were no lesions observed when only one allele of β-catenin (Lgr5CreER Catnblox(ex3)/+) was mutated (chi-squared test, P < 0.001).Colonic lesions were scored from H&amp;amp;E by identification of disorganised epithelium. Staining for β-catenin and SOX9 confirmed activation of Wnt signalling in the observed lesions. Scale bar, 100 μm.
Figure 3Staining of small intestinal and colonic crypts for E-cadherin. Scale bar, 100 μm.Western blot of purified crypts from the small intestine and colon (N = 4 mice).qRT-PCR of whole tissue from small intestine and colon. Expression of mRNA (2(−dCt)) calculated relative to GAPDH (N = 3 mice). Statistics: one-sided Mann-Whitney U-test.Proximity ligation assay for E-cadherin and β-catenin. For each mouse (N = 6), at least 10 crypts per tissue were analysed to calculate the mean. Statistics: one-sided Mann-Whitney U-test; white scale bar, 50 μm.
Figure 4Immunoprecipitation (IP) of E-cadherin from VilCreER Catnblox(ex3)/lox(ex3) mice, 24 h (day 1, top) and 48 h (day 2, bottom) after induction. The ratio of wild-type (WT, top lane) and mutant exon 3 β-catenin (Δex3, bottom lane) bound to E-cadherin (IP:Ecad) was calculated for each tissue. Graphs show average of experiments (N = 3 mice for each genotype and time point); error bars represent s.e.m.IP of E-cadherin from VilCreER Catnblox(ex3)/+ mice at day 4 and day 8. Graphs show average of experiments (N = 3 mice for each genotype and time point); error bars represent s.e.m.
Figure 5AhCreERCatnblox(ex3)/+ compared to AhCreER Catnblox(ex3)/+ Cdh1fl/+ at day 10 post-induction. Note the presence of colonic lesions in the colon of AhCreER Catnblox(ex3)/+ Cdh1fl/+ mice (arrows). Scale bar, 100 μm; red bar indicates proliferative zone (BrdU).Scoring of BrdU-positive cells per half-crypt in the small intestine of wild-type, AhCreERCdh1fl/+, AhCreERCatnblox(ex3)/+ and AhCreERCatnblox(ex3)/+Cdh1fl/+mice at day 10 post-induction. N ≥ 3, at least 25 crypts per mouse were scored. There was significantly higher proliferation in the AhCreERCatnblox(ex3)/+Cdh1fl/+mice (P = 0.028, one-sided Mann-Whitney U-test).In vitro growth of crypts (small intestine) from mice as indicated at day 5 post-induction without R-spo1. Quantification of sphere-forming efficiency of AhCreERCatnblox(ex3)/+AhCreERCatnblox(ex3)/+Cdh1fl/+, day 5 post-induction. N = 3 mice per genotype, mean of 6 technical replicates per mouse, P = 0.04 one-sided Mann-Whitney U-test.Survival of Lgr5CreERCatnblox(ex3)/+ and Lgr5CreERCatnblox(ex3)/+Cdh1fl/+ shows significant acceleration (P = 0.000123, log-rank test) after E-cadherin reduction. About 85% (6/7 mice) had colonic lesions, as identified with β-cateninIHC in contrast to Lgr5CreERCatnblox(ex3)/+mice.
Figure 6Proximity ligation assay for E-cadherin:β-catenin on a tissue microarray of SPT patients. PLA dots/cells in normal and tumour tissue were counted. Each dot in the boxplot represents the average for a single patient. Staining for β-catenin confirms accumulation of nuclear β-catenin in tumour tissue. Representative pictures are shown. N = 18, statistics: Mann-Whitney U-test, P = 0.0009051. White scale bar, 50 μm.Correlation of several Wnt target genes with the expression of E-cadherin (CDH1) was analysed in 269 HCC patients (TCGA provisional), and linear regression line (blue) and confidence region (shaded) were added.
figf1a, A TRPML1Va-expressing HEK293T cell showed a large inwardly rectifying whole-cell current elicited by voltage steps (from -140 mV to +80 mV in increments of 20 mV) in the standard extracellular (Tyrode's) bath solution. Step duration, 90 ms; holding potential, 0 mV; Vm, membrane potential.b, No significant inward current was detected in NMDG+ (Na+-free, Ca2+-free, pH 4.6) solution.c, Inwardly rectifying step currents were evoked by 30 mM Fe2+ solution (pH 4.6) in the same cell as shown in a and b.d, pH-dependence of IFe/TRPML1Va. Whole-cell currents were elicited by repeated voltage ramps (-100 to +100 mV; 400 ms) with a 4-s interval between ramps. Only a portion of the voltage protocol is shown. Holding potential, 0 mV.e, Large IFe/TRPML2Va was seen in the presence of 30 and 105 mM Fe2+ (pH 4.6).f, Little or no IFe was seen in a TRPML3Va-expressing cell.
figf2a, Current densities (mean ± s.e.m., n = 4-10) of IFe (30 mM Fe2+, pH 4.6) for TRPML1Va and ML4 mutant TRPML1Va channels. Asterisk indicates statistical difference (P < 0.01) compared to TRPML1Va.b, 55Fe2+uptake (normalized) in HEK293T cells transfected with vector control, with TRPML1Va, with F408D-TRPML1Va and with T232P-TRPML1Va constructs. Error bars indicate the standard deviation on the basis of two independent triplicate experiments.c, [Fe2+]o-dependent quenching of Fura-2 fluorescence in TRPML1Va-transfected cells (arrows), but not in non-transfected control cells (arrowheads) or T232P-TRPML1Va-transfected cells (bottom row). The fluorescence intensity was measured at an excitation wavelength of 360 nm (F360). The original magnification used for all micrographs was ×200.d, Average normalized responses of EGFP-positive TRPML1Va-transfected cells (typically n = 20-40 cells) to 1 or 10 mM Fe2+ (pH 4.6).e, No significant quenching was seen in T232P-TRPML1Va-transfected cells.f, Slightly less quenching was observed for the F408Dgr;-TRPML1Va-expressing cells.g, A small but significant quenching reaction was detected (with 10 mM Fe2+) in R403C-TRPML1Va-expressing cells.
figf3a, Co-localization of mCherry-TRPML1 and EGFP-LAMP1 at the membrane of an isolated enlarged LEL (see Methods). The patch pipette was filled with red rhodamine B dye (shown in blue for the purpose of illustration).c, Lysosomal ITRPML1Va. Switching from lysosome-attached to (lysosome) luminal-side-out configuration significantly reduced the amplitude of the current. The luminal-side-out patch was exposed to the Tyrode's solution. A Cs+-based solution (147 mM Cs-methanesulphonate (Cs-MSA)) was used as a pipette solution for both configurations.d, NMDG+-impermeable lysosomal ITRPML1Va was much larger in the absence of divalent cations (nominal divalent-free). e, Lowering pH potentiated lysosomal ITRPML1Va. f, IFe/TRPML1Va induced by 30 mM and 105 mM Fe2+.g, Whole-lysosome current in an enlarged lysosome expressing wild-type TRPML1. The pipette (lumen) solution contained nominal divalent-free Tyrode solution. A Cs+-based bath solution (147 mM Cs-MSA) was used. h, Whole-lysosome ITRPML1Va. i, Whole-lysosome IFe/TRPML1. The pipette (lumen) solution contained 105 mM Fe2+ (pH 4.6).
figf4a, Cultured TRPML1-/- (ML1-/-) skin fibroblasts showed less de-quenching of the iron-sensitive fluorescence than ML1+/- cells did. De-quenching was achieved by preloading the fibroblasts with an iron-sensitive dye, Phen Green SK (PG SK), and then adding the membrane-permeable transition metal chelator, 2,2′-bipyridyl (BPD). 2,2′-BPD is predicted to chelate free cellular iron (also referred to as chelatable or labile iron), which subsequently increases PG SK fluorescence. The original magnification used was ×200b, The average 2,2′-BPD induced normalized change of fluorescence (Dgr;F/F0) for ML4 cells (ML1-/-; n = 6 experiments) is significantly (asterisk, P < 0.01) lower than for the parental ML1+/- cells. Fibroblast cells (n = 10-20) were analysed for each individual experiment. 4,4′-BPD, a 2,2′-BPD analogue that cannot bind Fe2+, did not induce any significant restoration of PG SK fluorescence. Error bars, s.e.m.c, An ML1-/- skin fibroblast cell showed autofluorescence in LAMP1-positive compartments. Autofluorescence (green) was detected within a range of excitation wavelengths (shown with excitation at 480 nm). No significant autofluorescence was observed for a ML1+/+ cell. Lysosomes were stained with a LAMP1 antibody (red). Differential interference contrast (DIC) images are shown for comparison.
Figure 1The central axial sections of the reconstructions. Note the C-terminal domain of gp104 and other low-density features that do not visualize well in the isosurface representation (panels (A-C)). Letters G, H and I indicate the position of the cross-sections shown in the homonymously labeled panels below. A 69 Å-thick slice of the reconstruction of the extended sheath cryoEM map orthogonal to the sixfold axis. The proximal and distal parts of one of the three fibers that run at 82° to the sixfold axis are indicated with a semitransparent cyan and magenta lines, respectively. Sections of the spontaneously and urea contracted sheath structures that cut through the baseplate/proximal part of the fiber plane, whose position in the reconstructions is indicated with a red line in panels (E and F). The putative direction of the distal part of the fiber that is completely disordered in the reconstructions is indicated with a solar cross symbol.
Figure 7Percentage of phage particles in the extended, intermediate, and contracted states after 5, 20 and 80 minutes of incubation with L. monocytogenes cell walls. The numbers above the bars show the number of particles contained in the tomograms. The average length of the tail and the standard deviation for each of the three states is given next to the color legend.The pre-attachment state. Here and elsewhere in this figure, the EM image in the lower panel is a slice through the cryoET reconstruction. Note that in the presence of the Listeria cell wall the gp108 fibers are no longer in their stowed conformation but instead are fully or partially unraveled. Gp108 fibers attach to the host cell wall but the sheath is not yet contracted. RBP/TF gp106 (and possibly gp107) pyramids reorient to point toward the cell surface, change their conformation, and bind to the cell wall. The baseplate-proximal part of the sheath is in a contracted state, whereas the capsid-proximal part is still in an extended state. The baseplate-proximal part of the sheath contains a segment where the tail tube is clearly visible because it no longer interacts with the sheath (lower panel). The post-attachment state. The tail is fully contracted and the tail tube has pierced through the cell wall. The capsid appears full indicating that DNA injection has not yet begun.
Figure 1B. Rev3l+/+ and Rev3l-/- MEFs were pulse-labelled with EdU for 15min, permeabilized, fixed and stained for EdU incorporation (green). S phase sub-stages from I to IV were evaluated by visual inspection of the cycling population (>300 EdU+ cells, top panel). Scale bar= 5 μm. Dot plots and pie charts show the relative proportion (percentage of total S) of each sub-stage from I to IV (middle and bottom panel, respectively). Each dot represents the mean of two technical replicates.
Figure 2C. Analysis of the active marks H3K27ac and H3K4me3 and facultative heterochromatin mark H3K27me3 content in early, mid, late and TTR compared to disturbed replicating regions found in Rev3l-/- MEFs. Bar in boxplot represents the median, and red points represents the mean. The limit of the boxes corresponds to the 0.25 to 0.75 quartiles with whiskers extending to the maximum value of 1.5 times the interquartile range. Graphs show data from two biological experiments.
Figure 3D. Relative mRNA levels of four genes involved in development (Hoxb2, 8, 9 and WT1) were validated through qRT-PCR from Rev3l+/+ and Rev3l-/- MEFs samples. The data were normalized to the amount of GAPDH mRNA. Error bars indicate standard error of the mean for three independent experiments. ***, P<0.001 and **, P<0.005 by Student's t-test. E. Relative mRNA levels of genes involved in imprinting (paternal expressed genes: Dlk1and Slc18a4 and maternal expressed genes: Dcn1 and H19) were validated through qRT-PCR from Rev3l+/+ and Rev3l-/- MEFs samples. The data were normalized to the amount of GAPDH mRNA. Error bars indicate standard error of the mean for three independent experiments. *** P<0.001 by Student's t-test.
Figure 4A. Total histones were acid extracted from Rev3l+/+ and Rev3l-/- MEFs. Samples were analyzed by western-blot using indicated antibodies specific to histone marks (right panel). An anti-pan H4 or H3 was used as loading control (left panel). Histograms show WT/KO Rev3l fold change relative to the immunoblot shown on the top panel (using 1X sample intensity).B. Histone mark levels were examined at selected genes repressed in Rev3l-/- MEFs (Hoxb2, Hoxb8, WT1). Histograms represent enrichment of H3K9me3 and H3K27me3 at indicated loci assessed by ChIP-qPCR in Rev3l+/+ and Rev3l-/- MEFs. Error bars indicate standard error of the mean for three independent experiments.C. H3K9me3 and H3K27me3 mark levels were evaluated at selected genes that localized in genomic loci displaying replication timing delay and downregulated in Rev3l-/- MEFs (FoxG1, GATA6). Histograms represent enrichment of H3K9me3 and H3K27me3 assessed by ChIP-qPCR at indicated loci in Rev3l+/+ and Rev3l-/- MEFs. Error bars indicate standard error of the mean for three independent experiments.
Figure 5G. MEFs cells were transfected with GFP-REV3L761-1029 WT PSVVL or ASAVA mutant and fixed with 4% formaldehyde. The distribution of GFP-REV3L constructs was detected by autofluorescence (green), chromocenters were visualized by HP1α immunostaining (red) and DNA was counterstained with DAPI. Scale bar= 10 μmH. Human 293T cells were transfected with either FH-REV3L700-900, mutant V802D F-H-REV3L700- 900 or empty vector. Forty-eight hours after transfection cell lysates were made and used for immunoprecipitation with HP1 antibody. Western blot was processed and membranes were immunoblotted with the indicated antibodies.I. 293T cells were co-transfected with F-H-REV3L700-900 or empty vector and V5-HP1γ, mutant IY/EE V5-HP1γ or empty vector. Forty-eight hours after transfection cell lysates were made and used for immunoprecipitation with α-V5 antibody. After electrophoresis, samples were immunoblotted with anti-HA, anti-HP1γ or anti-α-Tubulin as indicated.
Figure 6B. Asynchronous Rev3l+/+ and Rev3l-/- MEFs were fixed with PFA then subjected to in situ proximity ligation assay (PLA) using 53BP1 and HP1α antibodies then PLA foci were counted in both cell lines (more than 150 nuclei for each condition were counted). p-values were calculated by Mann-Whitney test ( ****: p<0.0001). Red lines indicate the mean values. Error bars: SEM. Controls with a single antibody are also shown. Experiments were repeated three times. Representative images are shown. Scale bar= 5 μm.C. Asynchronous Rev3l+/+ and Rev3l-/- MEFs were subjected to PLA as by using γH2AX and HP1β antibodies and processed as in (B). p-values were calculated by Mann-Whitney test ( *: p<0.05). Red lines indicate the mean values. Error bars: SEM. Controls with a single antibody are also shown. Three independent experiments were performed.Rev3l+/+ and Rev3l-/- MEFs were incubated with or without 0.23 μM aphidicolin for 24h before metaphase spreading. FISH was performed using major satellite probe to quantify breaks in pericentromeric regions (F). Representative images of chromosomes showing abnormalities (see arrows) in pericentromeric regions from Rev3l-/- MEFs. Chromosomes were labelled with DAPI Error bars indicate standard error of the mean for three independent experiments. Mann-Whitney test (ns: not significant, * p<0.05; *** p< 0.001).
Figure 8A. Asynchronous Rev3l+/+ and Rev3l-/- MEFs were UV-irradiated at the indicated doses and harvested 6 h or 24 h later. Cell lysates were analyzed by immunoblotting with indicated antibodies. B. Asynchronous Rev3l-/- MEFs complemented with empty vector (EV) or REV3L were UV-irradiated at the indicated doses and harvested 6 h or 24 h later. Cell lysates were analyzed by immunoblotting with indicated antibodies. C Asynchronous Rev3l+/+ and Rev3l-/- MEFs were pulse labelled for 15 min using 10 μM EdU then UV-irradiated at 4 J/m2. Cells pre-treated with CSK buffer were fixed and 53BP1, RPA and RAD51 were detected by immunofluorescence. Representative images in non-irradiated cells (NI) and quantification of 53BP1 foci in EdU positive cells at different time points are shown Scale bar= 10 μm The number of cells analyzed is indicated in (n) on each graph. ***p < 0.001 (Kruskal-Wallis test). The presented data are representative of 2 repeats). Bars represent the median ± interquartile rangeF-H. Asynchronous Rev3l-/- MEFs complemented with empty vector (EV) or REV3L were processed as in (C). Quantification of 53BP1 foci in EdU positive cells at different time points is shown (F). Quantification of the intensity of chromatin-bound RPA2 (G) and RAD51 foci (H) 24 hours after UV-irradiation was performed. The number of cells analyzed is indicated in (n) on each graph. ***p < 0.001 (Kruskal-Wallis test). The presented data are representative of 2 repeats. Bars represent the median ± interquartile range.
Figure 1A RNF123 suppresses the SeV- and EMCV-induced but not the cGAS and STING-mediated activation of the IFN-βpromoter. HEK293T cells (3×105) were transfected with the IFN-β reporter plasmid (100 ng), the pRL-TK Renilla luciferase plasmid (100 ng), the expression plasmid for cGAS (50 ng) and STING (50 ng) or empty vector (100 ng), and 0, 20, 50, or 100 ng (wedges) of RNF123 for 12 h, and then were infected with SeV or EMCV or left uninfected. Luciferase assays were performed after 18 h and results are presented relative to the luciferase activity in control cells.B RNF123 inhibits the SeV-, but not the cGAS and STING-induced activation of the NF-κB promoter. HEK293T cells (3×105) were transfected with the NF-κB reporter plasmid (100 ng), the pRL-TK Renilla luciferase plasmid (100 ng), the expression plasmids for cGAS (50 ng) and STING (50 ng), or empty vector (100 ng), and 0, 20, 50 or 100 ng (wedges) of RNF123 for 12 h, and were then infected for 24 h with SeV or left uninfected, followed by analysis as described in A.C, D RNF123 inhibits the SeV-induced, but not the cGAS and STING-mediated RANTES and IFN-β transcription. The transfection and treatment were as in A. Total RNA was isolated and RT-PCR (C) was performed using the indicated primers.C, D RNF123 inhibits the SeV-induced, but not the cGAS and STING-mediated RANTES and IFN-β transcription. The transfection and treatment were as in A. Total RNA was isolated and Q-PCR (D) was performed using the indicated primers.E RNF123 inhibits the SeV-induced, but not the cGAS and STING-mediated IFN-β secretion. The transfection and treatment were as in A. Bioassays for type I interferon in the supernatants of HEK293T cells were performed and the results are presented relative to untreated control cells.F Overexpression of RNF123 enhances NDV-eGFP replication. HEK293T cells (1×105) were transfected with the expression plasmids for Flag-RNF123 or empty vector (2 µg). At 24 h after transfection, cells were infected with NDV-eGFP. At 30 h after infection, viral replication was determined by GFP expression visualized by fluorescence microscopy and analyzed by western blot.G RNF123 enhances EMCV replication. HeLa cells (1×105) were transfected with the expression plasmids for Flag-RNF123 or empty vector (2 µg). At 24 h after transfection, cells were infected with EMCV or given DMEM with no virus. At 18 h after infection, viral replication was determined by VP1 expression, which was analyzed by western blot.
Figure 2A HEK293T cells with stable knockdown of RNF123 were generated using shRNA. Western blot was performed with anti-RNF123, anti-VISA (as a control), and anti-GAPDH antibodies after infection with five lentiviruses encoding a shRNA control (GFPsh) and four shRNAs targeting RNF123 (RNF123 sh #1, #2, #3, and #4) in HEK293T cells.B, C Knockdown of RNF123 facilitated the activation of IFN-β and NF-κB promoters induced by SeV and EMCV but not by cGAS and STING. Stable HEK293T cells with GFPsh or RNF123 shRNAs (2×105) were transfected with the indicated reporter plasmid (100 ng), pRL-TK Renilla luciferase plasmid (100 ng), cGAS (50 ng), and STING (50 ng), or empty vector (100 ng). At 12 h after transfection, they were infected for 12 h with SeV or EMCV or left uninfected, followed by analysis as described in the legend of Fig 1A.D, E Knockdown of RNF123 enhances the IFN-β and RANTES transcription induced by SeV and EMCV, but not that by cGAS and the STING. HEK293T cells were transfected with cGAS (1 μg) and STING (1 μg) or empty vector for 12 h, and then infected with SeV or EMCV for 12 h or left uninfected. Total RNA was isolated and RT-PCR (D) were performed using the indicated primers.D, E Knockdown of RNF123 enhances the IFN-β and RANTES transcription induced by SeV and EMCV, but not that by cGAS and the STING. HEK293T cells were transfected with cGAS (1 μg) and STING (1 μg) or empty vector for 12 h, and then infected with SeV or EMCV for 12 h or left uninfected. Total RNA was isolated and Q-PCR (E) were performed using the indicated primers.F, G Time-course of potentiation of SeV-induced IFN-β transcription (F) by knockdown of RNF123. HEK293T cells were infected with SeV for 6, 12, 18, or 24 h, total RNA was isolated, and RT-PCR was performed using the indicated primers (F).F, G Time-course of potentiation of SeV-induced IFN-β secretion (G) by knockdown of RNF123. HEK293T cells were infected with SeV for 6, 12, 18, or 24 h, total RNA was isolated. Bioassays of type-I interferon in the supernatants of HEK293T cells were performed, and the results are presented relative to untreated control cells (G).H HeLa cells with stable knockdown of RNF123 were generated by shRNA. Western blot was performed as described in Fig 2A.I, J Knockdown of RNF123 enhances SeV- and EMCV- induced IFN-β expression in HeLa cells. HeLa cells were infected with SeV or EMCV for 12 h, total RNA was isolated, and RT-PCR (I) was performed using the indicated primers.I, J Knockdown of RNF123 enhances SeV- and EMCV- induced IFN-β expression in HeLa cells. HeLa cells were infected with SeV or EMCV for 12 h, total RNA was isolated, and Q-PCR (J) was performed using the indicated primers.K Knockdown of RNF123 suppresses NDV-eGFP replication. HEK293T cells (2×105) were infected with NDV-eGFP. At 30 h after infection, viral replication was determined by GFP expression visualized by fluorescence microscopy and analyzed by western blot with GFP antibody.L Knockdown of RNF123 inhibits EMCV replication. HeLa cells (2×105) were infected with EMCV for 0, 12, or 18 h.