EMBO/sd-character-level-ner huggingface dataset:
Figure 3(A) Schematic representation of the IL-2Rα proteins used in this study. WT: wild-type, ΔSS: signal sequence (SS)-deleted mutant, and ΔSSΔTM: SS and transmembrane domain (TM)-deleted mutant. (B) IL-2Rα ΔSS mislocalized to the cytosolic fraction. HeLa cells, expressing Flag-tagged IL-2Rα WT or ΔSS, were fractionated to the cytosolic (Cyt.) and membrane (Mem.) fractions. Tubulin was used as a cytoplasmic marker, while calnexin was used for the ER membrane fraction. (C) IL-2Rα ΔSS was not glycosylated. Flag-tagged IL-2Rα WT or ΔSS proteins was expressed in HeLa cells, and immunoprecipitated with an anti-Flag antibody. The precipitates were incubated with (+) or without (-) 10 unit of the deglycosylation enzyme PNGase F for 2 h, and subjected to western blot analysis with an anti-Flag antibody. Glycosylated and non-glycosylated signals are indicated. (D) The glycosylated form of IL-2Rα WT is a stable protein, while mislocalized IL-2Rα ΔSS is degraded rapidly via its TMD. A series of IL-2Ra deletion proteins were expressed in HeLa cells and then chased with 20 μg/mL CHX for the indicated periods. Actin was used as a loading control. The right panel is a quantified graph of the left blot signals represent mean ± SD calculated from 4 independent experiments (n=4). (E) IL-2Rα ΔSS is degraded in a proteasome-dependent manner. HeLa cells expressing Flag-tagged IL-2Rα ΔSS were treated with 20 μg/mL CHX as well as 0.1% DMSO (DM.), 10 μM MG-132 (MG.), 2 μM Bortezomib (Bor.), 10 μM Leupeptin (Leu.), 0.1 μM Bafilomycin A1 (Baf.), or 10 μg/ml Pepstatin A (pep. A)/E64d for the indicated periods. The right panel indicates that the quantified data of the left blot signals represent mean ± SD calculated from 3 independent experiments (n=3). (F) The Flag-tagged IL-2Rα ΔSS mutant and T7-tagged ubiquitin were co-expressed in HeLa cells and the cells were treated with (+) or without (-) 10 μM MG-132. After 4 h, Flag-precipitates were blotted with anti-T7 and anti-Flag antibodies. (G) HeLa cells expressing Flag-tagged IL-2RaWT, ΔSS, and ΔSSΔTM proteins were treated with (+) or without (-) 10 μM MG-132. At 4 h after MG-132 treatment, the cells were lysed and analyzed by immunoblotting using the indicated antibodies. Note that a higher migrating form of non-glycosylated (and thus defective) IL-2Ra WT (indicated by the arrowhead) is detected strongly in the presence of MG-132.
Figure 4Confocal images showing localization of PI(3,4) P2 ( tPH-CynA-KiKGR ; green) and α-tubulin (red) in fixed wild type Dictyostelium AX3 cells in 3D. Arrow shows a vesicle attaching to the α-tubulin labelled microtubules. Confocal images showing localization of PI(3,4) P2 (green) and α-tubulin (red) in fixed AX3 cells after Nocodazole treatment in 3D. Time-lapse confocal images showing dynamic localization of PI(3,4) P2 (green) and F-actin (red) in wild-type Dictyostelium cells. Nocodazole was added at time 0 during live cell imaging. Color-coded tracing of vesicle at 10-sec intervals from experiment in C. Time-lapse confocal images showing dynamic localization of PI(3,4) P2. Nocodazole was added at time 0 during the live cell imaging.   Quantification of vesicle number, vesicle number/min, and vesicle lifetime (s) from experiment in E. T-test was carried out by GraphPad Prism, **P ≤ 0.01 versus After Nocodazole group; mean±SEM (n = 10).   Time-lapse confocal images of individual cells of growth-stage wild-type Dictyostelium AX2 or RacH- strain highlighting tPH-CynA-KikGR-coated macropinocytic vesicles and back-to-front membrane gradient. Images were captured every 7 sec. Intensity plot across wild-type Dictyostelium AX2 or RacH- strain in image "147 s" shown in (G). (I) Lifetime T-test was carried out by GraphPad Prism, *P ≤ 0.05, ****P ≤ 0.0001 versus AX2 group; mean ± SEM (n = 20). (J) number or (K) area of tPH-CynA-KikGR coated macropinocytic vesicles in wild-type AX2 and RacH− cells. T-test was carried out by GraphPad Prism, *P ≤ 0.05, ****P ≤ 0.0001 versus AX2 group; mean ± SEM (n = 20). (L) Representative confocal images of tPH-CynA-KikGR in wild-type Dictyostelium AX2 or RacH− cells treated with 5 μM latrunculin A Scale bar: 5 μm. (M) Ratio of membrane to cytosol intensity of tPH-CynA-KikGR in wild-type Dictyostelium AX2 and RacH− cells. T-test was carried out by GraphPad Prism, ****P ≤ 0.0001 versus AX2 group; mean ± SEM (n = 33).
Figure 1(A) Western blot of SMC3-LAP expressing HeLa cells treated with siRNA as indicated and synchronized in G2-phase. Efficiency of RNA interference and SMC3 acetylation levels were analyzed from total extracts and after chromatin fractionation (asterisks indicate unspecific signals that were depleted from antibody dilutions used in later experiments, presumably by repeated usage of the antibody samples). Note that ESCO1 levels were increased on chromatin after depletion of ESCO2, raising the possibility that a decrease in chromatin bound ESCO2 might be compensated for by ESCO1 recruitment to chromatin. (B) Still images of an inverse fluorescence recovery after photobleaching (iFRAP) experiment. Fluorescence intensities are false-colored as indicated. Size bar, 5 μm.(C) Graph depicting the normalized intensity after photobleaching from two biological replicates to quantify chromatin dissociation kinetics. Error bars denote standard error of the mean (s.e.m.), n = 10 cells per condition.(D) Quantification of the relative abundance of SMC3-LAP in the stable chromatin binding mode.
Lipid droplet biogenesis precedes the onset of mitophagy a.Figure 3a. Lipid droplet time course. Representative photomicrographs showing lipid droplet abundance in ARPE19 cells treated with DFP starting at 7 h and maximal at 24 h. Neutral lipids were revealed by BODIPY 493/503. Nuclei are counterstained with Hoescht33342. Inset shows detail of LDs in a cell treated with DFP for 24 h. Arrows highlight LD accumulation. Scale bars =5 μm. b. Mitophagy time course. Representative photomicrographs showing time course of DFP treatment in mitophagy reporter cells (human ARPE-19 cells with stable expression of mito-QC). Mitochondrial networks are visible in yellow and mitolysosomes as red-only puncta signifying mitophagy. Nuclei are counterstained with Hoescht33342. Mitophagy appears maximal after 24 h of DFP treatment, with little difference between control and 7 h conditions. Inset shows details of mitolysosomes within the mitochondrial network of a highly mitophagic cell following DFP treatment. Arrows highlight mitolysosomes. Scale bar = 5 μm. c. Lipid droplets accumulate at mitochondria when cells are treated with DFP. Representative photomicrographs showing lipid droplet and mitochondria in ARPE19 cells treated with DFP at 7 h and at 24 h. Neutral lipids were revealed by BODIPY 493/503 and mitochondria by Mitotracker. Nuclei are counterstained with Hoescht33342. Inset shows detail of LDs in close proximity to mitochondria in cells treated with DFP for 24 h. Scale bar = 5 μm. d. Quantification of lipid droplet area per cell over time. Lipid droplet area was quantified per cell area using a pipeline generated in CellProfiler. n=3 with at least 50 cells quantified per biological replicate for each condition. Data represent means ±SEM. e. Quantification of mitophagy over time. Mitophagy index per cell is measured as a ratio of the number of mitolysosomes per mitochondrial content. n=3 with at least 50 cells quantified per biological replicate for each condition. Data represent means ±SEM. f. Quantification of lipid droplet and mitochondria proximity over time. n=2 with at least 50 cells quantified per biological replicate for each condition. Ratios between Control and 24h DFP; P<0.05.
Molecular basis of IFT22 association with IFT74/81 ccVI A.Figure 3A. Cartoon representation of the IFT22-binding site on IFT74/81 ccVI (top left) and surface conservation representation of different orientations of IFT22/74/81 (top right and bottom). IFT74/81 ccVI displays a highly conserved patch at the IFT22-binding interface (black dashed circle). A 180° rotation of IFT22 (bottom right) exhibits a likewise conserved patch at the IFT74/81-binding interface (black dashed circles; position of the IFT74/81 helices is marked with light grey lines). Conserved residues are marked and labeled according to the Tb sequence. Conservation coloring is based on Clustal Omega multiple sequence alignments with H. sapiens, M. musculus, D. rerio, T. brucei, C. reinhardtii and C. elegans sequences and ConSurf conservation grades B. Detailed view of the IFT22-IFT74/81 binding site in two perpendicular orientations showing interacting residues in stick representation. Residues provided by IFT22 switch I and II are shown in yellow, whereas IFT22 non-switch region interactions are colored in green. IFT74 is shown in orange and IFT81 in grey. IFT22 residue where mutation abolishes interaction with IFT74/81 are highlighted in red C. SDS-PAGE gel of a Ni2+-NTA pulldown using His-tagged TbIFT22 (WT and mutants) and untagged CrIFT25/27/74/81. WT TbIFT22 is able to pull down the Cr tetrameric complex, thus forming a chimeric IFT-B1 pentamer, while both the A86R and S19N mutant fail to bind the complex.
TIGAR modulation of autophagy influences apoptosis.Figure 6(A) Quantitation of the percentage of GFP-LC3 puncta positive cells. U2OS cells stably over-expressing Flag-tagged-TIGAR (clones TIGAR#5 and TIGAR#7) or control cells (clones Cont#1 and Cont#3) were left untreated or exposed to nutrient starvation for 6 h, with or without treatment with Z-VAD-FMK for 24 h. The percentage of cells with GFP-LC3 puncta was calculated, and data are shown as the mean and standard deviation of the mean from three independent experiments. (B) Apoptosis in U2OS cells stably over-expressing Flag-tagged-TIGAR (clones TIGAR#5 and TIGAR#7) or control cells (clones Cont#1 and Cont#3), as measured by cells with a sub-G1 DNA content. Cells were transfected with either scrambled, TIGAR siRNA1 or TIGAR siRNA2. Cells were left untreated, exposed to nutrient starvation for 6 h or to metabolic stress for 24 h. (C) Apoptosis in U2OS cells cotransfected with scrambled or TIGAR siRNAs, and scrambled, ATG5 siRNA or ATG10 siRNA, as measured by cells with a sub-G1 DNA content. After 48 h, cells were left untreated, exposed to nutrient starvation for 6 h or to metabolic stress for 24 h. Data are shown as the mean and standard deviation from three independent experiments. In each case, the increase in apoptosis after knockdown of ATG5 or ATG10, compared with the matched control, was statistically significant; * represents significant difference from control conditions (P<0.05); # represents a lack of significant difference from control conditions (P>0.05).
Figure 2A, RT-qPCR quantification of viral RNA (SARS-CoV-2 N gene relative to RPLP0) upon infection of A549-ACE2 cells with indicated SARS-CoV-2 strains at 24 hpi. Cells were pretreated with BB94 (10 µM) or DMSO for 6 h. Data are normalized to DMSO (N = 3-7). A two-sided independent Student's t-test with Benjamini-Hochberg FDR correction was performed. Data information: Data are represented as means ± 95% CI from at least three (A, biological replicates *p < 0.05, **p < 0.01, ***p < 0.001. B. RT-qPCR quantification of viral RNA (SARS-CoV-2 N gene relative to RPLP0) upon infection of A549-ACE2 cells with indicated SARS-CoV-2 strains at 24 hpi. Cells were pretreated with BB94 (10 µM), DPC-333 (10 µM) or DMSO for 6 h. Data are normalized to DMSO (N = 3-7). A two-sided independent Student's t-test with Benjamini-Hochberg FDR correction was performed. Data information: Data are represented as means ± 95% CI from at least three , B) biological replicates *p < 0.05, **p < 0.01, ***p < 0.001. C. Normal Human Bronchial Epithelial cells (NHBE) from ten donors were infected with SARS-CoV-2. NHBE cells were pre-treated with camostat mesylate (10µM), BB94 (1 µM or 10 µM) or DMSO for 6 hours. RNA was isolated at 24 hpi and levels of SARS-CoV-2 N relative to RPLP0 from total cellular RNA was measured by RT-qPCR. Data are normalized to the DMSO control (N = 5-10). Two-sided independent Student's t-test with Benjamini-Hochberg FDR correction. Data information: Data are represented as means ± 95% CI from at least five/ten biological replicates *p < 0.05, **p < 0.01, ***p < 0.001. D, NHBE cells from five donors were infected with GFP-expressing SARS-CoV-2. Infection of cells was monitored microscopically as green fluorescence through live-cell imaging at 72 hours post-infection (hpi) and is shown as the mean of the GFP-positive area relative to the whole area covered by cells in the same well. In (D) NHBE cells were pre-treated with the indicated drugs for 6 hours before infection Data are normalized to the DMSO control (N = 5). Two-sided independent Student's t-test with Benjamini-Hochberg FDR correction. Data information: Data are represented as means ± 95% CI from at least five/ten biological replicates *p < 0.05, **p < 0.01, ***p < 0.001. E. NHBE cells from five donors were infected with GFP-expressing SARS-CoV-2. Infection of cells was monitored microscopically as green fluorescence through live-cell imaging at 72 hours post-infection (hpi) and is shown as the mean of the GFP-positive area relative to the whole area covered by cells in the same well. NHBE cells were were treated in (E) with the indicated drugs 4 hours after infection. Data are normalized to the DMSO control (N = 5). Two-sided independent Student's t-test with Benjamini-Hochberg FDR correction. Data information: Data are represented as means ± 95% CI from at least five/ten biological replicates *p < 0.05, **p < 0.01, ***p < 0.001.
Figure 4(A) WB of H1299 cells stably expressing Δ133p53 and treated with control morpholino oligos (Ctl-1 or Ctl-2) or antisense morpholino oligo targeting Δ160p53's translation initiation (MO) (B) A431 and HT29 cells expressing endogenous mutant R273Hp53 were treated with control morpholinos (Ctl-2 or Ctl-1) or antisense morpholino oligo targeting Δ160p53's translation initiation site (MO) before lysis and WB. wtp53-expressing A549 cells were used as reference for endogenous wtp53 expression levels. Δ160 lane was used as a marker lane showing Δ160p53 as transiently expressed in p53-null H1299 cells. (C) Shown are the average Δ160p53 protein levels expressed in R273Hp53 versus other mutant p53cell lines that were treated with control morpholino (Ctl-1) or morpholino targeting 160p53's translation initiation site (MO). MO efficiently targets 160p53 in endogenous R273Hp53 cell lines. See also figure EV3 for the raw data. (D-E) A431 (D) and HT29 (E) cells endogenously expressing mutant R273Hp53 were treated with control siRNA (si Ctl) or control MO (MO Ctl-2 or MO Ctl-1) or siRNA targeting exon 7 of p53 (si) or MO targeting Δ160p53's translation initiation site (MO), as indicated, submitted to endoplasmic reticulum stress by exposure to thapsigargin (Th) and then analysed for apoptosis by incubation with propidium-iodide (PI) and FACS analysis. wtp53-expressing A549 cells were similarly control-treated and used as comparison. Data was normalized against A549 cell condition, which was set to 100. (F) A431 and HT29 cells endogenously expressing mutant R273Hp53 were treated with control morpholino Ctl-1 or morpholino targeting Δ160p53's translation initiation site (MO) and then assessed by confocal microscopy for invasion further than 30 μm through a Matrigel-fibronectin matrix towards EGF-supplemented growth media. The 30 μm plane is indicated and scale bars represent 100 μm. Quantifications are shown in the right panel. (G) Model illustrating how mutations in p53 induce loss of function but also gain of new functions via isoform expression. The semi-transparent boxes represent plausible minimal full-length p53 and short p53 isoforms activities.
Patient FMRP aggregates in the nucleolus.Figure 2A-C HEK293 (A) and SH-Sy5y (B) cells, as well as primary neurons from FMR1 KO mice (C), were transfected with vectors encoding the GFP-tagged wild-type FMRP (GFP-FMR1WT) or the GFP-tagged patient FMRP (GFP-FMR1G-insertion) under the control of a β-actin promoter. Wild-type FMRP localizes predominantly in the cytoplasm, whereas the patient FMRP forms nuclear and nucleolar aggregates that colocalize with nucleophosmin. Scale bars in (A, B) represent 10 μm. Scale bar in (C) represents 5 μm.
Figure 2(A) The pathways of lipolysis and lipogenesis. G-3-P: glycerol-3-phosphate. LPA: lysophosphatidic acid. PA: phosphatidic acid. DAG: diacylglycerol. TAG: triacylglycerol. MAG: monoacylglycerol. FA: fatty acid. (B) The evolutionary phylogenetic trees of DGAT1 and DGAT2. (C) Overexpressing the homologs of DGAT1/2 in neurons of C. elegans leads to LD accumulation in neurons. Each dot represents one worm. The data were analyzed using one-way ANOVA with Dunnett's multiple comparison test. Asterisks denote significant differences as compared to the control xdIs109. ***P < 0.001, ****P < 0.0001. Data show mean ± SEM. n ≥ 8.
Mitochondrial proteins locally synthesized in the synapse are incorporated into respiratory chain complexes (A) Synaptoneurosomes were NMDAR-stimulated and incubated with radioactive 35S-methionine/cysteine mix for 1h.Figure 4(A) Synaptoneurosomes were NMDAR-stimulated and incubated with radioactive 35S-methionine/cysteine mix for 1h. Samples were separated using blue-native electrophoresis (BN-PAGE). Protein complexes were visualized by Coomassie staining (left) and autoradiography (right). Autoradiography of the BN-PAGE gel shows de novo synthetized mitochondrial proteins that are incorporated into respiratory chain complexes. To block protein import and incorporation of newly synthesized proteins into respiratory complexes the mitochondrial electrochemical potential was abolished by treatment with carbonyl cyanide m-chlorophenyl hydrazone (10 μM CCCP) (B) Protein complexes were separated on BN-PAGE and visualized by Coomassie staining and autoradiography. 1 hour after the stimulation, significant increase in 35S-labelled proteins was observed (B, n=4 biological replicates, * , ** p=0.0023; repeated measures one-way ANOVA, post-hoc Sidak's multiple comparisons test). Blocking protein import into the mitochondria significantly inhibited the incorporation of 35S-methionine into respiratory chain complexes when samples were incubated in the presence of CCCP (B; n=4 biological replicates, * p=0.02, repeated measures one-way ANOVA, post-hoc Sidak's multiple comparisons test) To block protein import and incorporation of newly synthesized proteins into respiratory complexes the mitochondrial electrochemical potential was abolished by treatment with VOA mixture (containing 1 μM valinomycin, 20 μM oligomycin, 8 μM antimycin) (C). Additionaly, in order to block protein synthesis, SN were pretreated with puromycin (PURO, 3mM) (C). Protein complexes were separated on BN-PAGE and visualized by Coomassie staining and autoradiography. 1 hour after the stimulation, significant increase in 35S-labelled proteins was observed C, n=5 biological replicates, ** p=0.0023; repeated measures one-way ANOVA, post-hoc Sidak's multiple comparisons test). Blocking protein import into the mitochondria significantly inhibited the incorporation of 35S-methionine into respiratory chain complexes when samples were incubated in the presence of VOA (C; n=5 biological replicates, ** p=0.0044, repeated measures one-way ANOVA, post-hoc Sidak's multiple comparisons test). Also, significant inhibition of 35S-methionine/cysteine incorporation into mitochondrial protein complexes in synaptoneurosomes was observed when samples were stimulated in the presence of puromycin (C, n=5 biological replicates, * p=0.0236, repeated measures one-way ANOVA, post-hoc Sidak's multiple comparisons test). Error bars indicate SEM.
Alternative conformations of p50-A and p50-B A.Figure 4Secondary structure diagram of p50-A and p50-B colored in rainbow from N- to C- termini in the shoulder. Helices H1-8 and S1 are labelled for p50-A and p50-B. Ribbon diagram of the lower subdomain of the shoulder showing the path of p50-A (B) and p50-B (C), colored as in A. The N-terminal halves of p50-A (D) and p50-B (E) adopt different conformations in each subdomain (lower subdomain shown), colored as in A.
Figure 2Ala/Phe substitutions of aa 239-244 were introduced in the NCT ectodomain to evaluate the role of this region in the regulation of GSEC processivity. Aβ38, Aβ40, and Aβ42 levels present in the conditioned medium collected from KO NCT MEF cells rescued with WT or respective mutant NCT GSECs and transiently expressing with APPC99 were quantified by ELISA. Aβ(38+40)/42 ratio was calculated to determine GSEC processivity towards APPC99. DKO PSEN1/PSEN2 MEFs rescued with the indicated FAD PSEN1 mutant and transduced with APPC99 were used as references. Representative SDS-PAGE/western blot analysis of CHAPSO solubilized membranes from KO NCT MEF cell lines stably expressing WT or mutant NCT subunits. The presence of mature, glycosylated NCT, N-terminal and C-terminal fragments of the endoproteolysed PSEN1 and PEN-2, compared to NCT knock-out (KO) cells, indicate that WT and mutated NCTs reconstitute GSEC complexes. Arrowheads indicate the position of molecular weight markers. Quantification of the effects of the indicated substitutions of aa 241, 242, and 244 in NCT on GSEC processivity of APPC99, estimated as indicated above by the Aβ(38+40)/42 ratio. Figure EV1B shows the corresponding Aβ42/40 ratios.
Figure 7Reaction network for MN development in the RC axis of the spinal cord. Cellular-level reactions including mRNA-miRNA interactions contain known binding sites of miR-27 and miR-196 on the 3' UTRs of the Hoxa5 and Hoxc8 mRNAs, respectively. RA and FGF act as signaling molecules to influence transcription. Weights of the orange arrows describe the magnitudes of the degradation rate constants in the mmi-S Model. Simulation of the spatiotemporal model. A grid of 10×40 cells was used to represent a segment of developing spinal cord where progenitor cells are influenced by competing FGF and RA concentrations. Panel at top right shows the distribution of ratios between Hoxa5 and Hoxc8 protein levels. Bifurcation analysis with position as the control parameter. Solid curves denote stable steady states. Gray: Hoxa5off Hoxc8off state; Red: Hoxa5on Hoxc8off state; Green: Hoxa5off Hoxc8on state; The identities of these states were determined by protein levels. Dashed curves denote unstable steady states. Simulation of the spatiotemporal model in the absence of miR-27. Bifurcation analysis under the miR-27 knockout condition. Yellow: hybrid state. Simulation of the spatiotemporal model in the absence of miR-196. Bifurcation analysis under the miR-196 knockout condition.