EMBO/SourceData huggingface dataset:
Figure 2(A-C) RAW264.7 cells were transfected with control or miR-155 mimic for 24 h followed by BCG (A), H37Ra (B) or H37Rv (C) infection at an MOI of 10 for 1 h, and intracellular mycobacterial viability was determined by CFU assay at the indicated timepoints.(D-F) RAW264.7 cells were transfected with control or miR-155 inhibitor for 24 h followed by BCG (D), H37Ra (E) or H37Rv (F) infection at an MOI of 10 for 1 h, and intracellular mycobacterial viability was determined by CFU assay at the indicated timepoints.(G and H) RAW264.7 cells were transfected with miR-155 mimic (G) or inhibitor (H) for 24 h followed by Texas Red-labeled BCG infection at an MOI of 10 for 1 h. Phagocytosis of mycobacteria was determined by flow cytometry. Data are shown as the mean ± SEM of three independent experiments. *, p<0.05; **, p<0.01.
Figure 3RAW 264.7 cells were transiently transfected with control or miR-155 mimic for 24 h and then infected with Texas Red-labeled BCG for 1 h. Lysosomes were immunolabeled with CD63 antibody followed by Alexa Fluor 488-conjugated goat anti-rabbit IgG antibody (A)The colocalization of BCG with lysosome was detected by confocal microscopy. The percentage of co-localization of BCG with CD63-positive (B)RAW 264.7 cells were transiently transfected with control or miR-155 mimic for 24 h and then infected with Texas Red-labeled BCG for 1 h. Lysosomes were immunolabeled with CD63 antibody followed by Alexa Fluor 488-conjugated goat anti-rabbit IgG antibody (A), or labeled with a fluorogenic substrate for proteases, DQ-Green (C). The colocalization of BCG with lysosome was detected by confocal microscopy. The percentage of co-localization of BCG with CD63-positive (B) or DQ-Green labeled (D) lysosomes was quantified, respectively. Cells treated with rapamycin were used as a positive control. Arrows indicate the co-localization of BCG with lysosomes; scale bar = 5 µm. Quantification of data are shown as the mean ± SEM of three independent experiments (n = 100 phagosomes). **, p<0.01.
Figure 4(A-D) RAW264.7 cells were transfected with miR-155 mimic (A and C) or inhibitor (B and D) for 24 h and then either left uninfected or infected with BCG. Expression levels of miR-155 were detected by real-time PCR (A and B).(A-D) RAW264.7 cells were transfected with miR-155 mimic (A and C) or inhibitor (B and D) for 24 h and then either left uninfected or infected with BCG. Expression levels of miR-155 were detected by real-time PCR (A and B). The LC3 levels were detected by Western-blot, and the ratios of LC3-II/β-actin were calculated as shown below the representative blot (C and D)(E and F) RAW264.7 cells transfected with miR-155 mimic (E) or inhibitor (F) was incubated with DMSO or bafilomycin A1 (BafA.) at a concentration of 100 nM for 2 h, and then LC3 levels were detected by Western-blot. The ratios of LC3-II/β-actin were calculated as shown below the representative blot. ***, p<0.001.
Figure 5(A and B) RAW264.7 cells stably expressing GFP-LC3 were transiently transfected with control or miR-155 mimic for 24 h, and GFP-LC3 puncta (>1 µm) were detected by confocal microscopy (A) and quantified (B).RAW264.7 cells were transiently transfected with control or miR-155 mimic for 24 h. Endogenous LC3 was stained with LC3 antibody followed by Alexa Fluor 488-conjugated goat anti-rabbit IgG (Green), and LC3 puncta (>1 µm) were detected by confocal microscopy (C) and quantified (D).(E and F) RAW264.7 cells were transiently transfected with control or miR-155 mimic for 24 h, and then incubated with a specific fluorescent dye MDC (50 µM). The MDC-labeled autophagic vacuoles were detected by confocal microscopy (E) and cells with MDC-positive autophagic vacuoles were quantified (F). Cells treated with rapamycin were used as a positive control. Arrows indicate the GFP-LC3 puncta or autophagic vacuoles labeled with MDC; scale bar = 5 µm. Data are shown as the mean ± SEM of three independent experiments (n = 300 cells). **, p<0.01; ***, p<0.001.
Figure 6(A) RAW264.7 cells stably expressing GFP-LC3 were transiently transfected with control or miR-155 mimic and then infected with Texas Red-labeled BCG for 1 h. The co-localization of BCG with LC3 was detected by confocal microscopy. (B) Quantification of the co-localization of BCG with LC3-positive autophagosomes is shown.(C) RAW264.7 cells were transiently transfected with control or miR-155 mimic, and then infected with Texas Red-labeled BCG for 1 h. Endogenous LC3 was stained with LC3 antibody followed by Alexa Fluor 488-conjugated goat anti-rabbit IgG (Green). The co-localization of BCG with endogenous LC3 was detected by confocal microscopy. (D) Quantification of the co-localization of BCG with LC3-positive autophagosomes is shown.(E) After transient transfection with control or miR-155 mimic, RAW264.7 cells were infected with Texas Red-labeled BCG for 1 h, and then were labeled with a specific fluorescent dye MDC (50 µM) for autophagic vacuoles. The co-localization of BCG with MDC-positive autophagic vacuoles was detected by confocal microscopy. (F) Quantification of the co-localization of BCG with MDC-positive autophagosomes is shown. Cells treated with rapamycin were used as a positive control. Arrows indicate the co-localization of BCG with autophagosomes; scale bar = 5 µm. Data are shown as the mean ± SEM of three independent experiments (n = 100 phagosomes). **, p<0.01; ***, p<0.001.
Figure 7(A and B) RAW 264.7 cells were transiently transfected with control or miR-155 mimic for 24 h, and then incubated with DMSO or 3-MA for 2 h. Protein levels of LC3 were detected by Western-blot in uninfected cells (A)Intracellular mycobacterial viability was determined at the indicated timepoints by CFU assay after BCG challenge for 1 h (B)(C and D) RAW 264.7 cells were transiently co-transfected with control or miR-155 mimic together with a control siRNA or Atg7 siRNA. The expression levels of Atg7 and LC3 were detected by Western-blot (C).Intracellular mycobacterial viability was determined by CFU assay at the indicated time after challenging with BCG for 1 h (D). Values of LC3-II/β-actin ratios are indicated below the representative blot. Data are shown as the mean ± SEM of three independent experiments. *, p<0.05; **, p<0.01; NS, not significant.
Figure 8(A) Sequences of mouse and human miR-155 and their predicted interactions with conserved 7-mer 1A miR-155 seeds found within the Rheb 3′UTRs of different species are shown. The sequence of the Rheb 3′UTR seed mutant used for the reporter assays and the predicted disruption of the miR-155 interaction are also shown.B) RAW264.7 cells were co-transfected with control or miR-155 mimic and a wild-type (WT-Rheb) or mutated Rheb 3′UTR (mut-Rheb) luciferase reporter plasmid and assessed for luciferase activity at 24 h after transfection. Data are shown as the mean ± SEM of three independent experiments. ***, p<0.001; NS, not significant.(C-F) RAW264.7 cells were transfected with miR-155 mimic (C and E) or inhibitor (D and F) for 24 h and either left uninfected or infected with BCG. Protein expression levels of Rheb were detected by Western-blot. Values of Rheb/β-actin ratios are indicated below the representative blot (C and D)(C-F) RAW264.7 cells were transfected with miR-155 mimic (C and E) or inhibitor (D and F) for 24 h and either left uninfected or infected with BCG. Protein expression levels of Rheb were detected by Western-blot. Values of Rheb/β-actin ratios are indicated below the representative blot (C and D), and expression levels of Rheb mRNA were detected by RT-PCR (E and F).
Figure 9(A) RAW264.7 cells were transfected with a plasmid expressing Rheb for 24 h, and then incubated with DMSO or BafA. for 2 h. The expression levels of Rheb and LC3 were detected by Western-blot. Values of LC3-II/β-actin ratios are indicated below the representative blot.(B and C) RAW264.7 cells were co-transfected with control or miR-155 mimic together with a control plasmid or a plasmid expressing Rheb for 24 h, and then infected with Texas Red-labeled BCG for 1 h. The co-localization of BCG and MDC-labeled autophagosome was detected by confocal microscopy. Arrows indicate Quantification of BCG co-localization with autophagosomes described in B is shown (C).D) RAW264.7 cells were co-transfected with control or miR-155 mimic together with a control plasmid or a plasmid expressing Rheb for 24 h. Cells were infected with BCG for 1 h, and washed for three times to remove extracellular mycobacteria. Intracellular mycobacterial viability was determined by CFU assay at the indicated timepoints. Data are shown as the mean ± SEM of three independent experiments. *, p<0.05; **, p<0.01; NS, not significant.
Figure 1(b, c) Immunoblots of recruitment reactions performed as described in (a), with the indicated proteins omitted. In (c), a mid reaction wash in high salt (0.5 M NaCl) buffer (HSW) was included following DDK phosphorylation as indicated.(d) Recruitment reaction performed as in (a), using wild type (wt) or a Cdc45-binding mutant (3E1) of Sld3.(f) Wild type or mutant FLAG-Sld3 was added to an S-phase protein extract and tested for interaction with Cdc45. Immunoprecipitated proteins were analysed by immunoblot.(h) Reaction performed as in (g). Nascent DNA was separated in a 0.7% alkaline agarose gel in this and all subsequent replication reactions.
Figure 2(a) Reaction performed as in Fig. 1a, except Cdc45 was omitted.(b) Reaction performed as in Fig. 1g, with the indicated proteins omitted.(e) Reaction performed as in (a), except Sld3/7 was incubated with Rad53 before addition to reactions. ATP was omitted from this pre-incubation as indicated.(f) Sld3 recruitment reaction performed as in (a). Sld7 was omitted from this experiment.
Figure 3(b) Recruitment reaction performed as described in (a).(c) Sld3/7 recruitment reaction conducted as in Fig. 2a.(d) Replication reaction performed as in Fig. 1g.(e) Representative tetrads from dissection of SLD3+/sld3-6E heterozygotes.
Figure 4(b, c, D) Immunoblot of reactions performed as described in (a). In (B), either reconstituted Sld3/7 complex (lanes 6 and 7) or Sld3 alone (lanes 8 and 9) was coupled to beads. In (C), MCM was treated with Lambda Phosphatase after dissociation from DNA (lanes 3 and 7).(b, c, D) Immunoblot of reactions performed as described in (a). In (D), Sld7 was omitted.(E) 30-residue phosphorylated Mcm6 peptides were bound to streptavidin-coated beads and used as bait to pulldown Sld3. Peptide-coupled beads were dephosphorylated with Lambda Phosphatase as indicated.(F) Reaction conducted as in (a), using wild type (wt) or the indicated S/T-A substitution mutant versions of Mcm4 and Mcm6. Positions of mutations in Mcm6 are summarised in Fig. EV5c.
Figure 5(a) Sld3/7 recruitment reaction performed as in Fig. 2a.(b) Replication reaction performed as in Fig. 1g. Experiments in (a) and (b) used MCM containing wild type (wt) or the indicated S/T-A substitution mutant versions of Mcm4 and Mcm6.c) Quantification of (b), performed using ImageQuant software (GE Healthcare).(d) Representative tetrads from diploids heterozygous for mcm4-25A and mcm6ΔN+11A.
Figure 6(b) Immunoblots of reactions performed as in (a) part i (lanes 1-3) or ii (lanes 4-6).(c) Reactions in i and ii were performed as described in (a) parts i and ii, respectively.
Figure 7(a, b) Recruitment reactions performed as in Fig. 2a. Sld7 was omitted in (b).(c) Recruitment reaction conducted as in Fig. 3a, with washes performed at 0.3 M KCl.(d) Replication reaction performed as in Fig. 1g. Experiments in (a)-(d) used MCM containing wild type (wt) or S/T-D substitution mutants of Mcm4 and Mcm6 as indicated. In (d), MCM loading was equalised across samples by using 5-fold more mutant than wild type MCM protein, as is shown in Fig. EV6c.
Figure 3B Representative TIRF-M of DCP1-GFP (DCP1pro:DCP1-GFP transgene) in the lateral PM of epidermal cells showing the transient attachment of DCP1-positive puncta to the PM. Yellow arrowheads denote a PB that shows motility at the PM focal plane; blue arrowheads show a PB that transiently localizes to the PM. Scale bars: 2 μm. The corresponding kymographs are shown to the right. Right: distribution of immobile and mobile DCP1 molecules relative to the motility log(D) value of -0.75 (threshold; see Material and methods for details), in NS or HS conditions (D, diffusion coefficient). Inset: individual trajectories of mobile DCP1-GFP in NS and HS conditions (500 frames, n = 120), showing a combination of directional and Brownian motion for both NS/HS. The green arrowheads denote the beginning of the NS and HS tracks for DCP1-GFP.C Representative confocal micrographs from lines co-expressing RPS5apro:HF-mScarlet-DCP1 and PIN2pro:PIN2-GFP (epidermal cells, region 3, Scale bars: 5 μm). Bottom: polarity index of DCP1 in root meristematic cells (compared to propidium iodide (PI) and tubulin staining of root cells; N, biological replicates = 3 roots, n = 13 cells). Polarity index calculated as the ratio of average of apical and basal VS lateral side of fluorescence signal intensity of the root epidemies cells. The arrowhead in PIN2 indicates the cell plate or PM in DCP1. Right: representative confocal micrographs showing that PM localization is independent of the promoter used (DCP1pro, 35Spro; region 2, epidermal cells, or RPS5apro on the lower right). The details from the inset show increased localization at the cell edge (discussed later). mSc, mScarlet.
Figure 4B Representative confocal micrograph of DCP1-GFP (DCP1pro:DCP1-GFP, transgene) in root meristematic cells under NS/HS conditions (region 2). Scale bars, 5 μm. Note the depletion of DCP1 from the PM upon HS, but the increased edge/vertex signal (yellow arrowheads denote the vertex signal). Right: DCP1 signal intensity at the PM or edge/vertex (N, biological replicates = 3, n (pooled data of 3 biological replicates) = 18-23 PMs or edges/vertices).C Representative confocal images showing fusion (coarsening), fission, and growth of PBs (DCP1-positive) at the PM (region 3). Right: states of PBs (dynamic: fusion and fission and non-dynamic: stable; N, biological replicates = 2, n (pooled data of 3 biological replicates) = 6-8 PBs). As a cautionary note, the "stable" PBs may not show dynamicity in the imaging time used (~3-5 min) but later, may do.
Figure 5Confocal micrographs showing single optical sections PLA-assays producing signal that resembles spots. The antibodies used were anti-FLAG/anti-GFP detecting the HF-mScarlet-DCP1/ DCP2-YFP, respectively (RPS5apro:HF-mScarlet-DCP1 and 35Spro:DCP2-YFP). Inset 1: magnification showing the colocalization of PLA spots with DCP1 or DCP2 signals (colocalization and Pearson's correlation coefficient PCC value for the spots shown). The dotted white line in the PLA channel corresponds to the PM plane. Inset 2: positive PLA signal for DCP1 and DCP2 in the nucleus. "n1-n3" correspond to nuclei regions (green circles). On the right, note the PLA spot nearby the nucleus ("detail of PLA signal"). The chart shows the quantification of PLA spots per cell at puncta (cytoplasm) or on the PM (N, biological replicates = 3, n (pooled data of 3 biological replicates) = 16-33 cells). As a cautionary technical note, the cytoplasmic, nuclear or PM "spots" do not connote physiologically relevant puncta, condensates or PM clusters. Scale bar: 20 μm / 10 μm for the insets.
Figure 6B Representative confocal micrographs with acceptor photobleaching-FRET efficiency between SCAR2-mCherry (up) or BRK1-mRuby (down) and DCP1-GFP (epidermal cells, regions 1 and 3). Right: normalized FRET efficiency between SCAR2 or BRK1 and DCP1, respectively, among the different developmental root regions (N, biological replicates = 2, n = 16 cells).D Representative confocal micrographs showing DCP1 localization detected by α-DCP1 in the wild type (WT) or the scar1 scar2 scar3 scar4 (scar1234) quadruple mutant or in live-cell imaging of mScarlet-DCP1 (RPS5apro:HF-mScarlet-DCP1) in WT or brk1 mutant (bottom right; epidermal cells, region 3 for α-DCP1 and 2 for live-cell imaging). The arrowheads denote the lack of robust DCP1 localization in scar1234 at the edge/vertex. Small panels (insets) at right show details corresponding to the regions delineated by dashed lines, where arrowhead denotes the edge signal of DCP1 in WT; scale bars, 1 μm. Bottom: percentage of cells with proper edge/vertex localization and quantification of PB numbers (DCP1-foci; N, biological replicates = 3, n (pooled data of 3 biological replicates) = 18-35 cells).
Figure 7A Representative confocal micrographs showing colocalization between DCP1 or two DCP1 phosphovariants with LifeAct-mCherry in lines co-expressing DCP1pro:DCP1-GFP (or variants) and UBQ10pro:LifeAct-mCherry (cell edges are indicated by yellow arrowheads). Right: relative signal intensity of actin at cell edges/vertices (normalized to the PM) in epidermal cells (N, biological replicates = 3, n = 15-30, regions 2-3).
Figure 8B Representative confocal micrographs showing actin localization in WT, dcp1-1, dcp1-3, scar1234, dcp2-1, dcp5 and pat1 upon phalloidin staining and graph (right) indicating the percentage of cells in region 3 with an accumulation of actin at edges in various genotypes (N, biological replicates = 3, n = 7-9 roots, bars show means + s.d.).
Figure 9A SE-FRET efficiency between DCP1-GFP or its phosphovariants with SCAR2-mCherry (among the three different root regions; mainly epidermal cells). Scale bar: 50 μm. The arrowhead denotes high FRET efficiency at edges/vertices of region 3. Right: signal quantification of SE-FRET efficiency between the indicated combinations at the epidermis of 3 regions (N, biological replicates = 6, n (pooled data of 3 biological replicates) = 10).C Representative confocal micrographs showing SCAR2-mCherry localization in WT and dcp1-3 mutant, respectively (root region 2, epidermal cells) and quantification of edge/vertex with SCAR2 a confined signal (N, biological replicates = 3, n = 5-8 cells).D Representative confocal micrographs showing the colocalization between DCP1-GFP or phosphovariants and SCAR2-mCherry in root meristematic cells (root region 2, epidermal cells). Scale bars: 10 μm. The insets show details of colocalization; the white arrowhead denotes the expansion of the SCAR2/DCP1 domain, while the yellow arrowheads the restricted edge/vertex SCAR2/DCP1 domains. Scale bars: 3 μm. The graph indicates the relative signal intensity for the indicated combinations (as Pearson's correlation coefficient; N, biological replicates = 3, n = 5 at edges/vertices: spread edges were not considered in calculations).
Figure 10A Representative images showing the phenotypes of dcp1 mutants and mutants in other PB core components or SCAR-WAVE components (5-day-old seedlings). The arrowheads show the growth defects of homozygous dcp1-1 or dcp2-1 mutants (denoted -/-; heterozygous denoted dcp1-1/DCP1; details are also shown). Lower: graph showing relative root length (N, biological replicates = 3, n (pooled data of 3 biological replicates) = 3-4 roots, bars show means + s.d).B DCP1 regulates cell expansion anisotropy. Representative confocal micrographs showing FM4-64 staining of the WT, dcp1-1 and dcp2-1 mutants (2 μM, 10 min). Scale bars, 20 μm. Right: percentage of isotropic cells per root meristem (%, epidermal cells) in each genotype (N, biological replicates = 3, n (pooled data of 3 biological replicates) = 3-5 roots, bars show means ± s.d). Examples of isotropic or anisotropic cells are shown, along with the developmental axis offset at the x- and y-axes.
Figure 1(A, B and C) Polyphenols TA , PGG and EGCG activate rhpR-lux in wild type but not rhpS deletion Psph strains. Data information: , * indicate significant differences between mock group and strains under the different test conditions. (Student's t test. n.s., not significant, *, P ≤ 0.05, **, P ≤ 0.01, and ***, P ≤ 0.001). Error bars represent standard deviations (n=3 biological replicates).(D, E and F) Polyphenols repress T3SS induction in P. syringae in MM. Transcripts of the indicated genes in the presence of 100-μM TA (D), 100-µM PGG (E) or 2-mM EGCG (F) were determined by RT-qPCR 6 hours after culturing in MM. Data information: , * indicate significant differences between mock group and strains under the different test conditions. (Student's t test. n.s., not significant, *, P ≤ 0.05, **, P ≤ 0.01, and ***, P ≤ 0.001). Error bars represent standard deviations (n=3 biological replicates).
Figure 2(D, E and F) Polyphenols inhibit the phosphatase activity of RhpS. The GST-RhpR was phosphorylated by adding 5-μM PSPPH_3550c protein as well as 10-μCi [γ-32P]-ATP for 10 minutes. The RhpS-FL protein was treated in the presence of different concentrations of TA (D), PGG (E), or EGCG (F) for 10 min. Then, the full-length RhpS protein was added into the mixture phosphorylated GST-RhpR for 1 hour before stopping the reaction. The phosphorylated proteins were separated by 12% SDS-PAGE. After electrophoresis, the SDS-PAGE gels were dried with gel-dryer and then exposed to a medical X-ray film overnight. This experiment was repeated twice, yielding similar results. Data information: the reaction was stopped by adding 5 × loading buffer before SDS-PAGE. Abbreviation is as follows: CBB, coomassie bright blue stain; CFU, colony-forming unit.(I, J and K) Polyphenols inhibits the virulence levels and in planta growth of Psph in bean plants. Bacterial virulence levels were estimated by inoculating Psph strains with or without polyphenols onto host bean plants. Disease symptoms were recorded 5 days after inoculation. Leaf disks (1 cm2) were removed 5 days after inoculation and diluted in sterile water to count bacterial CFUs. The experiment was repeated three times. Data information: , * indicate significant differences between mock group and strains under the different test conditions as indicated. (Student's t test. *, P ≤ 0.05, **, P ≤ 0.01, and ***, P ≤ 0.001). Error bars represent standard deviations (n=3 biological replicates).
Figure 3(B, C and D) Polyphenols bind to the RhpS-FL protein. The concentration of RhpS-FL protein was consistently measured as 0.6-μM. The binding curves of TA (B), PGG (C) and EGCG (D) are shown. The individual data points were shown (n=2 biological replicates).(E) Alanine-scanning mutagenesis of the RhpS sensor. RhpS containing a corresponding mutation was provided in the rhpS deletion strain on a pHM1 vector. LUX activity was estimated in the absence (black frame) and presence TA (50-μM), PGG (100-μM) or EGCG (2-mM). Error bars represent standard deviations (n=3 biological replicates). Data information: , * indicate significant differences between mock group and strains under the different test conditions as indicated. (Student's t test. *, P ≤ 0.05, **, P ≤ 0.01, and ***, P ≤ 0.001).
Figure 4(C and D) The rhpS/PSPPH_3550/PSPPH_3736/PSPPH_5115 quadruple deletion strain restored the T3SS induction of rhpS deletion strain. The wild type, rhpS deletion and quadruple deletion strains were cultured in MM (C) for 6 hours or KB (D) to OD600=0.6. Transcripts of the indicated genes were determined by RT-qPCR. Data information: , * indicate significant differences between rhpS mutant and quadruple mutant. Error bars represent standard deviations (n=3 biological replicates). Student's t test. *, P ≤ 0.05, **, P ≤ 0.01, and ***, P ≤ 0.001.(F) The quadruple mutant strain restored the pathogenicity of rhpS deletion strain. Bacterial virulence levels were estimated by inoculating wild type, rhpS deletion and quadruple deletion strains onto host bean plants. Disease symptoms were recorded 5 days after inoculation. The experiment was repeated three times.(G) Leaf disks (1 cm2) from (G) were removed 5 days after inoculation and diluted in sterile water to count bacterial CFUs. The experiment was repeated three times. Data information: , * indicate significant differences between rhpS mutant and quadruple mutant. Error bars represent standard deviations (n=3 biological replicates). Student's t test. *, P ≤ 0.05, **, P ≤ 0.01, and ***, P ≤ 0.001.