EMBO/SourceData huggingface dataset:
Figure 6Weighted mean univariate K-function curves of immunogold labeled GFP-HRASG12V under indicated conditions, n ≥ 15 for each condition. The gold point patterns were analyzed with univariate K-functions expressed as L(r)-r. The bar graph on the right shows the peak value Lmax of the L(r)-r curve, which represents the extent of GFP-HRASG12V nanoclustering. Values are normalized to DMSO average and represent mean±SEM (n ≥ 15 for each condition). Statistical significances of differences were evaluated in bootstrap tests.Bar graph showing GFP-HRASG12V content in the inner leaflet of the plasma membrane is quantified as the number of gold particles per 1μm2 region from electron micrographs. Values are normalized to DMSO average and represent mean±SEM, n ≥ 15 for each condition. Statistical test employed was Student's t-test with Bonferroni post hoc correction to account for multiple pairwise comparisons.The extent of GFP-HRASG12V nanoclustering quantified by Lmax values in cells exposed to the indicated perturbations. Values are normalized to DMSO average and represent mean±SEM (n ≥ 15 for each condition). Statistical significances of differences were evaluated in bootstrap tests.Bar graph showing GFP-HRASG12V content in the inner leaflet of the plasma membrane is quantified as the number of gold particles per 1μm2 region from electron micrographs. but in cells exposed to the indicated perturbations. Values shown are normalized to DMSO average.Representative Western blots generated using extracts from HN31 cells stably expressing the MCOLN1 shRNA. Samples treated with exogenous cholesterol for 3 hours are indicated at the bottom. Primary antibodies used are indicated on the right.Representative Western blots generated using extracts from HN31 cells stably expressing the MCOLN1 shRNA. Samples treated with exogenous cholesterol for 3 hours are indicated at the bottom. Bar graph showing quantification of the Western blots in (F). All values represent mean±SEM. Data points represent values from biological replicates. Statistical test employed was ANOVA.
Figure 7Bar graph showing the relative levels of total in HN31 cell extracts exposed to the indicated perturbagens Values represent mean±SEM. Data points represent values from biological replicates. Statistical tests employed were Student's t-test and ANOVA.Bar graph showing the relative levels of free/total cholesterol in HN31 cell extracts exposed to the indicated perturbagens Values represent mean±SEM. Data points represent values from biological replicates. Statistical tests employed were Student's t-test and ANOVA.Bar graph showing the relative levels of free/total cholesterol in larval brain extracts from animals of the indicated genotypes Values represent mean±SEM. Data points represent values from biological replicates. Statistical tests employed were Student's t-test and ANOVA.Confocal images of MDCK cells expressing mCherry-D4H. Colocalization with the cortical actin (phalloidin) indicates that mCherry-D4H is predominantly localized to the plasma membrane in DMSO treated cells. Within 24 hours of ML-SI1 treatment, the mCherry-D4H redistributes to intracellular punctae. Although minimal mCherry-D4H signal remained at the plasma membrane in ML-SI1-treated cells, the phalloidin signal (cortical actin) remained unchanged. Scale bar (10μm) shown in the panel on the top right applies to all panels. Bar graph showing quantification of mCherry-D4H punctae in DMSO or ML-SI1-treated cells. All values represent mean±SEM. Data points represent values from biological replicates. Statistical test employed was Student's t-test.Confocal images of MDCK cells expressing mCherry-D4H and LAMP1-GFP treated with ML-SI1. Scale bar (10μm) shown in the panel on the top right applies to all panels.Confocal images of control and MCOLN1 shRNA-expressing HN31 cells treated with the cholesterol sensor, filipin. Scale bar (10μm) shown in the panel on the top applies to both panels. Bar graph showing the quantification of the internalized filipin staining in HN31 cells after MCOLN1 knockdown. All values represent mean±SEM. Data points represent values from biological replicates. Statistical test employed was Student's t-test.Fraction of phase-separated GPMVs at the indicated temperatures. Colors of the lines indicate the treatment conditions of MDCK cells prior to generation of GPMVs. Dashed vertical lines indicate the miscibility temperature of the indicated populations of GPMVs. Values shown represent mean±SEM. Lines were generated by fitting the data to sigmoidal functions.Bar graph showing miscibility temperatures of GPMVs isolated from MDCK cells exposed to the indicated conditions. All values represent mean±SEM. Data points represent values from biological replicates. Statistical test employed was Student's t-test.
Figure 1Fluorescence polarization (FP) competition derived affinity assessment of consecutive truncations of the DAT C13 C-terminus as indicated by the sequences. Bars indicate the mean fold change relative to C13 (Ki = 1.69 µM). Data is shown as mean with error-bars as SEM with n = 6. Representative binding curves are shown in EV1A.FP competition binding of C5 and Tat-C5 to PICK1 with 5FAM-Tat-C5 (20 nM) as tracer. Saturation binding curve is shown in EV1B.Backbone amide chemical shift changes (ΔδHN) of PICK1-PDZ-C10 after addition of Tat-C5 and addition of protease to cleave C10 from the PDZ domain and allow exchange. Numbers refer to residue number in PICK1 (Uniprot: Q9EP80). Red bars indicate a chemical shift larger than mean+SD.1H-15N-HSQC 2D spectra of PICK1-PDZ-C10 (orange) following addition of Tat-C5 (green) and subsequent addition of protease (red) to allow for exchange between C10 and Tat-C5.Selectivity screen for Tat-C5 against a selection of 42 purified PDZ domains, performed with a fixed concentration of Tat-C5 (10 µM) in competition with PDZ domains and their respective fluorescent ligands. Data are normalized to binding in absence of peptide (full line). Dashed line represents the level of competition obtained for PICK1. Screen for C5 can be seen in EV1C.Affinity gain of bivalent C5 peptides (Pn-(C5)2) N-terminally conjugated with different length PEG linkers as indicated. Bars indicate the mean fold change relative to C5 (Ki = 1.69 µM). Data is shown as mean with error-bars as SEM with n = 6. Representative binding curves are shown in EV1C.FP competition binding of C5 (also used in C) and Tat-P4-(C5)2 to PICK1 with 5FAM-Tat-C5 (20 nM) as tracer.
Figure 2Representative confocal images of SCMS expressing Tac-YFP-DATC24, incubated with pre-complexed fluorescently labelled PICK1 and unlabelled peptides as indicated (10 nM), scale bar 10 µm. Full concentration curves shown in Fig S4 and include the representative images shown here.   SCMS derived competitive binding curves for peptides as indicated, red line indicates 10 nM as shown in representative images.   Representative confocal images of SCMS expressing Tac-YFP-DATC24, incubated with fluorescently labelled PICK1 and subsequently unlabelled peptide as indicated (10µM). Scale bar 10 µm. Full concentration curves shown in Fig EV2 and include the representative images shown here. Efficacy of the peptides as indicated to facilitate dissociation of PICK1 from SCMS, red line indicates 10 µM as shown in representative images.
Figure 3Size exclusion chromatography (SEC) profiles of PICK1 in absence (pink, Absmax = 11.7 ml) and presence of Tat-C5 (purple, Absmax = 11.7 ml)SEC profiles of PICK1 in absence (pink, Absmax = 11.7 ml) and presence of Tat-P4-(C5)2 (blue, Absmax = 10.7 ml)SEC profiles of PICK1 in absence (pink, Absmax = 11.7 ml) and presence of TMR-Tat-P4-(C5)2 (blue (abs280 nm), red (abs544 nm), Absmax=10.7 ml).Representative SEC profiles of PICK1 (40 µM) incubated with increasing concentration of Tat-P4-(C5)2, colors indicate Gaussian fits of respective population, (red) aggregates/Void, (blue) dimeric PICK1, (green) oligomeric PICK1, (orange) unbound Tat-P4-(C5)2.Quantification of abs280 at Evol = 11.7 ml (dimer - blue) and Evol = 10.7 ml (tetramer - green) as a function of concentration (0-10 µM) of Tat-P4-(C5)2. Light blue line indicates tetramer fraction of total PICK1.SDS-PAGE sedimentation assay showing increased amounts of PICK1 in the pellet (P) fraction with increasing concentrations of Tat-P4-(C5)2. PICK1~50kDa, Tat-P4-(C5)2~10kDa. S denotes supernatant fraction.Small angle X-ray scattering (SAXS) derived scattering curves of a concentration range of PICK1 on absolute scale show concentration dependent aggregation. Pair distance distribution function (pddf) of PICK1 in absence of Tat-P4-(C5)2, indicating very large protein complexes present in sample.SAXS derived scattering curves of a concentration range of PICK1 in complex with Tat-P4-(C5)2 on absolute scale show minor concentration dependent aggregation. Pair distance distribution function (pddf) of a concentration range of PICK1 in presence of Tat-P4-(C5)2, indicating a smaller complex than for PICK1 in absence of Tat-P4-(C5)2.
Figure 4Representative confocal images of hippocampal neurons showing membrane penetration of TMR-Tat-P4-(C5)2 and TMR-Tat-C5 (5µM) (magenta), but not the control TMR-C5 (all 20µM). The cell membrane was stained with DiO (grey). Scale bars: 10µm and 5µm on the zooms/orthogonal views.Representative confocal images of hippocampal neurons transduced with the viral vector encoding GFP-PICK1 and incubated with 5nM TMR-Tat-P4-(C5)2. Partial co-localization between TMR-Tat-P4-(C5)2 (red), GFP-PICK1 (green) and GluA2 (blue) is seen in insert zooms. Experiment was done three times. Scale bars: 10µm and 1µm on the zooms.Representative immunoblots from hippocampal slices following treatment with Tat-P4-(C5)2 or Tat-C5 (bath application, 20µM).Densitometric analysis of immunoblots from C show reduced PICK1:GluA2 Co-IP following incubation with Tat-P4-(C5)2 but not Tat-C5. Bar graphs show mean with error-bars as SEM. (One-way ANOVA followed by Dunnett´s multiple comparisons test, *** p≤0.001, n = 4/group)Representative immunoblots from hippocampal slices following Tat-P4-(C5)2 bath application (20µM) show reduction in the phosphorylation level of S880 GluA2 both under basal condition and after chemical LTD (cLTD). Bar graphs show densitometric analysis of immunoblots from (E).Representative immunoblots from hippocampal slices following Tat-C5 bath application (20µM) show reduction in the phosphorylation level of S880 GluA2 both under basal condition and after chemical LTD (cLTD). Bar graphs (right panel) show densitometric analysis of immunoblots from (G).Representative confocal images of hippocampal neurons stained for surface GluA2 (sGluA2, light blue) and internalized GluA2 (iGluA2, red). Treatment with Tat-P4-(C5)2 (20 µM) significantly increases the constitutive, but not PMA induced internalization. Scale bars 10µm. Quantification of iGluA2/sGluA2 within the region of interest for individual neuron (see I, top right corner). Tat-C5 did not increase GluA2 internalization (see Appendix Fig S9D-F).
Figure 5Representative coronal slices from lumbar spinal cord show the presence of both TMR-Tat-P4-(C5)2 and TMR-Tat-C5 peptides (magenta) 1 hour after i.t. administration in naïve mice. Scale bar 200µm. DH dorsal horn, VH ventral horn. Insert zooms of merged channels (right panels), scale bar 50µm.Representative immunoblots of co-immunoprecipited PICK1:GluA2 from spinal cord lumbar tract total lysates demonstrate partial disruption of this interaction 1 hour after 20 µM i.t. injection of Tat-P4-(C5)2. Densitometric analysis of immunoblots indicate a significant effect following Tat-P4-(C5)2 treatment, graph show mean +/- SEM and individual points, unpaired t-test, **p≤0.01, n=4/groupRepresentative immunoblots of co-immunoprecipited PICK1:GluA2 from spinal cord lumbar tract total lysates demonstrates no disruption of this interaction 1 hour after 20 µM i.t. injection Tat-C5. Densitometric analysis of immunoblots indicate no significant effect of Tat-C5, graph show mean +/- SEM and individual points, unpaired t-test, p=0.10, n=4/groupRepresentative immunoblots of lumbar spinal cord total lysates exhibit decreased pS880-GluA2 total levels following 20 µM Tat-P4-(C5)2, and Tat-C5 i.t. injections compared to saline injected animals. Densitometric analysis of immunoblot indicates a significant effect only for Tat-P4-(C5)2 (graph show mean +/- SEM and individual points, One-way ANOVA followed by Dunnett´s multiple comparisons test, ** p≤0.01, n=5-6/group as indicated by individual values)Surface biotinylation of spinal cord slices under basal condition demonstrates unchanged GluA1 and GluA2 surface level upon Tat-P4-(C5)2, Tat-C5 peptides incubation compared to the untreated condition (CTR). Densitometric analysis of immunoblots show that the reduction in mean surface for GluA2 in not significant (graph show mean +/- SEM and individual points, One-way ANOVA followed by Dunnett´s multiple comparisons test, n=5/group as indicated by individual values).Immunoblot of PICK1 following pull-down from lumbar spinal cord with Biotin-Tat-P4-(C5)2 or Biotin following 20 µM i.t. administration demonstrating in vivo target engagement.
Figure 6i.t. administration (20µM) of Tat-P4-(C5)2 significantly reduced ipsilateral paw hypersensitivity of SNI mice in the initiation stage (2 days after injury) of the spared nerve injury model at time points 1 and 3 hours (n = 7)i.t. administration (20µM) of Tat-C5 did not affect ipsilateral paw hypersensitivity of SNI mice in the initiation stage (2 days after injury) of the spared nerve injury model (n = 8)Representative western blots (top) for GluA1 and GluA2 following surface biotinylation of spinal cord slices. Densitometric analysis (bottom) of immunoblots. We observed up-regulation of both GluA1 and GluA2 surface level following SNI surgery compared to non-operated animal CTL (unpaired t test GluA1: t(4)=3.372, GluA2: t(4)=3.991,#p≤0.05, n=3/group). Tat-P4-(C5)2 but not Tat-C5 significantly reduced the SNI-induced GluA2 surface expression and shows a strong tendency for GluA1 as well. Representative immunoblot shows unaltered PICK1 total level in the total lysate in the four conditions.Images of lumbar spinal cord sagittal sections showing the time course of TMR-Tat-P4-(C5)2 (magenta) after i.t. administration (20 µM) in SNI mice showing maximal accumulation in cells after 60 min. Scale bar 1000 µm and 100 µm in Zooms.Overlay with immunohistochemical staining for the neuronal marker NeuN (yellow) highlights strong neuronal tropism of TMR-Tat-P4-(C5)2 (magenta). Scale bar 100 µmDose-dependent Von Frey test in the acute phase (2 days after injury) of the spared nerve injury model following i.t. administration of Tat-P4-(C5)2 (n=8/group) did not affect ipsilateral paw hypersensitivity of SNI mice and lasts up to 4h post injection.i.t. administration of Tat-P4-(C5)2 (20 µM) at day 14 and 28 after injury in the maintenance phase of SNI model in mice shows significant increase in pain withdrawal threshold up to 3 hours with equal efficacy in male and female mice (compared to time 0 pre-injection, D14 n=8/group/gender, D28 n=6 male, n=7 female).
Figure 7Representative images of kainate-induced cobalt uptake in spinal cord slices from p14 mouse pups treated with i) saline, ii) TNFα and iii) TNFα + Tat-P4-(C5)2. Scale Bar: 100 µm. Quantification of cobalt positive (black soma) cells. Each data point represents the average 4-6 25 µm sections from a single 400 µm slice. Bars show means of 4-6 slices and error bars represent SEM. (one-way ANOVA followed by Bonferroni's multiple comparisons test, *P <0.05, **P<0.01).Bar chart showing the mean amplitude of the field potential at lateral positions in lamina 1 recorded before and approximately 30 minutes after peptide administration which was significantly reduced (Wilcoxon matched pairs, *P = 0.0313, W = -26, n = 7 mice, error bars: SEM). Line chart to show data from (E), as separate data points for individual mice expressed as a percentage relative to baseline measurements. From this it can be seen that the response was variable across mice with just over half showing a large reduction and the remaining mice only showing a relatively minor reduction (with no reduction in one mouse). The von Frey thresholds for the individual mice before the experiment are shown next to each line. Bar chart showing the mean amplitude of the field potential at lateral positions in lamina 2 recorded before and 30 minutes after peptide administration which was significantly reduced (Wilcoxon matched pairs, *P = 0.0313, W=-26, n=7 mice, error bars: SEM). Line chart to show data from (G), as separate data points for individual mice expressed as a percentage relative to baseline measurements. From this it can be seen there was reduction in all but 1 mouse, although the magnitude of the reduction was again variable across mice. The von Frey thresholds for the individual mice before the experiment are shown next to each line.Bar chart showing that the mean amplitude of the incoming volley is reduced post administration (Wilcoxon matched pairs, *P = 0.0156, W = -28, n = 7 mice, error bar: SEM). Line chart to show data from (J), as separate data points for individual mice expressed as a percentage relative to baseline measurements. From this it can be seen that the response was variable across mice with half showing a large reduction and the remaining mice only a minor reduction.Amplitude of the incoming volley expressed as a percentage of the baseline recording prior to peptide administration. In these 3 mice, a reduction in the incoming volley at 30 minutes post-administration is seen. After this recording, the remaining peptide was removed by washing the spinal cord and two further recordings made at 1 and 2 hours. Here it can be seen that the incoming volley does not deteriorate further but stabilises or starts to return towards baseline levels confirming that the initial reduction was not due to a deterioration in the health of the animal or damage to the roots.
Figure 1Kaplan-Meier curves for overall survival (OS) in lung adenocarcinoma TCGA_LUAD (RASSF1 mRNA high/low cutoff FKPM 5.85) and squamous cell carcinoma patients TCGA_LUSC (RASSF1 mRNA high/low cutoff FKPM 6.52). Significance derived from log-rank test.Western blot with indicated antibodies of isogenic H1299 cells stably transfected with either empty vector pcDNA3 (H1299control) or RASSF1A (H1299RASSF1A). Bottom: cell proliferation resazurin assay. (n=2). Error bars represent mean ± S.E.M.Size of lung primary tumours measured at day 30 after lung orthotopic injection either with H1299control (n=14 mice per group; experimental groups of 6 and 8 different shading within the groups represents two independent experiments) or with H1299RASSF1A cells stably re-expressing RASSF1A, (n=12 mice per group; experimental groups of 6 and 6). The size of primary tumours was measured by MRI software ITK-SNAP. Statistical significance via 2-tailed Student's t-test. Error bars represent mean ± S.E.M.Visual assessment quantification of metastatic events on the ipsilateral (left) and or contralateral (right) lungs, generated by H1299control or H1299RASSF1A at day 30. Result was calculated from 2 independent in vivo experiments Graph shows significant decreasing of metastases when lungs were injected with H1299RASSF1A. Statistical significance via 2-tailed Student's t-test. Error bars represent mean ± S.E.M.
Figure 2Mass-spectrometry analysis of proteins purified from extracellular matrix isolated from H1299control and H1299RASSF1A lung adenocarcinoma cell lines with summary of results. Only proteins identified with two or more peptides were taken into consideration. The resulting list of proteins was restricted to ECM proteins (n=3).Kaplan Meier plots depicting prognosis in TCGA_LUAD (lung adenocarcinoma) with high and low mRNA expression of ECM proteins revealed by proteomics. Significance derived from log-rank test. Data information: Unless otherwise indicated all statistical analyses were performed using Student's t-test (2-tailed) of n=3 experiments and error bars represent the mean ± S.E.M.Representative images of H&E and IHC staining for P4HA2, and quantification (bars) of two independent regions of n=5 H1299control and n=3 H1299RASSF1A primary lung tumours. Scale bars 100µm. Data information: Unless otherwise indicated all statistical analyses were performed using Student's t-test (2-tailed) of n=3 experiments and error bars represent the mean ± S.E.M.Hydroxyproline assay (Cell biolabs Inc.) for total hydroxyproline activity of cells. Data information: Unless otherwise indicated all statistical analyses were performed using Student's t-test (2-tailed) of n=3 experiments and error bars represent the mean ± S.E.M.Western blot indicating levels of Collagen I in H1299control and H1299RASSF1A cells.Western blot indicating levels of Collagen I in H1299control cells in the presence of (4μM) prolylhydroxylase inhibitor (DPCA), siRNA against P4HA2 or combination.Quantification of immunofluorescence staining of Collagen I in H1299control cells in the presence of (4μM) prolylhydroxylase inhibitor (DPCA), siRNA against P4HA2 or combination. H1299RASSF1A cell line was used as negative control for comparison. Data information: Unless otherwise indicated all statistical analyses were performed using Student's t-test (2-tailed) of n=3 experiments and error bars represent the mean ± S.E.M.Immunofluorescence staining for Collagen I and P4HA2 and quantification (right graph) in HOP92 cells after siRNA against RASSF1A. Scale bars 20µm. Data information: Unless otherwise indicated all statistical analyses were performed using Student's t-test (2-tailed) of n=3 experiments and error bars represent the mean ± S.E.M.Western blot analyses in HOP92 cells showing increased expression of collagen I after siRNA against RASSF1A.Immunofluorescence staining for Collagen I and P4HA2 and quantification (right graph) in HeLa cells after siRNA against RASSF1A. Scale bars 20µm. Data information: Unless otherwise indicated all statistical analyses were performed using Student's t-test (2-tailed) of n=3 experiments and error bars represent the mean ± S.E.M.