EMBO/SourceData huggingface dataset:
Figure 9Fluorescence images of (a) pag2 (strain STK2) and (b) pag3 (strain STK3) mutants of P. pastoris after a 3 h shift to glucose. (b) Arrows show deeply invaginated structures of vacuolar membranes surrounding peroxisomes in the pag3 mutant.
Figure 10Fluorescence images of the pag4 (strain STK4) mutant of P. pastoris after (a) 0, (b) 3, or (c) 6 h of glucose adaptation. The vacuolar membrane proliferated extensively and surrounded peroxisomes during glucose adaptation.
Figure 11Microautophagy of peroxisomes in a pex1-ts mutant (strain SJH242) of P. pastoris expressing GFP-SKL from the constitutive glyceraldehyde-3-phosphate dehydrogenase (GAPDH) promoter at the restrictive temperature for peroxisome assembly (34°C). (a) Kinetics of peroxisome degradation at 34°C. Strain SJH242 was induced on methanol at 23°C, and glucose adaptation was performed at 34°C. (b) Changes in vacuole morphology were seen even in the absence of normal peroxisomes. At 0 h, SJH242 cells were grown at 34°C when GFP-SKL was diffuse in the cytosol and many vacuoles showed spherical morphologies. After 2 h, ∼20-30% vacuoles showed complicated membrane structures representative of stage 2 cells.
Figure 1D. Plot of initial MT polymerization velocities at 37 °C in the presence of increasing concentrations of WT or NN. Tubulin concentration = 5 μM. Each point represents an average of 3 independent measurements of the rate of turbidity increase measured at 500 nm wavelength (OD500/min). Fitted are sigmoidal dose-response curves: Y = YB + ((YT - YB)/(1 + 10Xi - X)), where YB and YT are Y values (OD500/min) at the bottom and top plateaus, respectively, and Xi is the X value at the inflection point. Representative MT samples from 2:5 μM WT:tubulin or NN:tubulin incubations are shown in E and F, respectively. MT architecture distributions for WT and NN are shown with pie graphs.E, F. Representative low and high magnification images of MTs nucleated for 10 min at 37 °C from 5 μM tubulin, in the presence of: 2 μM wild-type DCX (WT) (E) or 2 μM NDC-NDC (NN) (F).H. Representative kymographs with arrowheads indicating MT catastrophes.
Figure 2A. Representative low-pass filtered cryo-EM micrographs of MTs decorated with wild-type DCX (WT) or NDC-NDC construct (NN) after 30 sec or 1 h incubation at 37 °C. Additional DCX proteins were added in excess after MT deposition on EM grids to maximise MT decoration. The final ratio of WT or NN to tubulin was 50:5 μM, giving dense protein background. WT co-polymerized exclusively 13-PF MTs, while NN both 13- and 14-PF MTs. Rapid (30 sec) MT polymerization in excess of WT produces MTs in an intermediate GTP/GDP.Pi state, whereas long-lived WT-MTs and NN-MTs are all in the GDP state.
Figure 1C-F. Immunofluorescence images of esg-GFP and Delta (Dl) staining with the midgut section from the R4 region of 14-day Drosophila (C), 26-day Drosophila (D), 40-day Drosophila (E), and 40-day Drosophila in response to 0.5 mM ALA administration, which started at day 26 after eclosion (F). esg-GFP (green) identifies ISCs and their differentiating cells. Dl staining (red) was used to visualize ISCs. Data information: DAPI stained nuclei are shown in blue.J. Western blotting results of midguts indicate a decrease of LAS in the midguts of aged Drosophila. Loading controls, β-tubulin. K. Quantification of LAS band intensity as seen in experiments (J). Error bars indicate the SD of three independent experiments. L Data information: Error bars represent SDs. Student's t-tests, *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001, and non-significant (NS) represents p > 0.05.
Figure 2C. Quantification of the content of ALA in midguts of flies with indicated genotypes using LC-ESI-MS/MS. Error bars indicate the SD of three independent experiments. Data information: Error bars represent SDs. Student's t-tests, ****p < 0.0001, and non-significant (NS) represents p > 0.05.D-F. Immunofluorescence images of the midgut section from the R4 region in Drosophila carrying esgts-GAL4-driven UAS-lacZ (D, control), Las RNAi (E), or Las RNAi in response to ALA administration (F). esg-GFP (green) indicates ISCs and their differentiating cells. Dl staining (red) was used to visualize ISCs. Data information: DAPI stained nuclei are shown in blue. Scale bars represent 10 μmI-J. Immunofluorescence images of control (FRT40A, I) and Las RNAi (J) MARCM clones (green, outlined by white dotted lines) 10 days after clone induction (ACI). Pdm1 staining (red) was used to visualize ECs. K. Quantification of the ratio of Pdm1+ cells per clone of MARCM clones with indicated genotypes. n is indicated. Each dot corresponds to one clone. L. Quantification of MARCM clone size of experiments in (I-J). n is indicated. Each dot corresponds to one clone. Data information: DAPI stained nuclei are shown in blue. Scale bars represent 10 μm (D Error bars represent SDs. Student's t-tests, ****p < 0.0001, and non-significant (NS) represents p > 0.05.
Figure 3A. Representative images and quantification of Drosophila midguts treated with the pH indicator Bromophenol Blue. Moreover, quantification of the three categories of Drosophila of indicated conditions. The three categories can be divided into: homeostasis, a well-defined acidic (yellow colored) copper cell region (CCR) is flanked by basic (blue colored) anterior midgut (AM) and posterior midgut (PM). "Perturbed A", the acidic region is lost and the whole gut is basic; "Perturbed B", the strongly acidic region is lost, and the remainder of the gut also becomes less basic. The numbers of quantified guts from left to right are 90, 90, and 90. Error bars show the SD of three independent experiments.C. Excretion of Drosophila treated with Bromophenol Blue. Images of deposits and quantification of deposit numbers are shown. Excretions are quantified in 30 fields for each group of 12 Drosophila. Tests were repeated as three independent experiments. Data information: The statistical tests used in other panels were student's t-tests. *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001, and non-significant (NS) represents p > 0.05.G. Survival (percentage) of female W1118 Drosophila with and without supplementation of ALA as indicated. The numbers of quantified flies: 100 (W1118 + 0.5 mM ALA) and 100 (W1118 + 0 mM ALA). Three independent experiments were conducted. Data information: Error bars represent SDs. p-values for lifespan curves were calculated by the log-rank test. The statistical tests used in other panels were student's t-tests. *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001, and non-significant (NS) represents p > 0.05.I. Survival (percentage) of female Canton-S Drosophila with and without supplementation of ALA as indicated. The numbers of quantified flies: 100 (Canton-S + 0 mM ALA), 100 (Canton-S + 0.5 mM ALA). Three independent experiments were conducted. J. Survival (percentage) of female Canton-S Drosophila with and without supplementation of ALA at 26-day as indicated. The numbers of quantified flies: 100 (Canton-S + 0 mM ALA) and 100 (Canton-S + 0.5 mM ALA). Three independent experiments were conducted. Data information: Error bars represent SDs. p-values for lifespan curves ( were calculated by the log-rank test. The statistical tests used in other panels were student's t-tests. *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001, and non-significant (NS) represents p > 0.05.
Figure 4A-F. Immunofluorescence images of midgut sections from the R4 region in Drosophila carrying esgts-GAL4-driven expression of CAT cDNA (A), CAT cDNA with AD4 administration (B), CAT cDNA with ALA administration (C), Keap1 RNAi (D), Keap1 RNAi with AD4 administration (E), or Keap1 RNAi with ALA administration (F). esg-GFP (green) represents ISCs and their differentiating cells. Dl staining (red) was used to visualize ISCs. G. Quantification of the number of esg-GFP+ cells, Dl+ cells of Drosophila carrying esgts-GAL4-driven expression of lacZ cDNA, CAT cDNA, CAT cDNA with AD4 administration, CAT cDNA with ALA administration, Keap1 RNAi, Keap1 RNAi with AD4 administration, or Keap1 RNAi with ALA administration. n is indicated. The numbers of quantified guts from left to right are 18, 19, 20, 18, 18, 19, 19, 18, 19, 20, 18, 18, 19, and 19. H. Quantification of the number of pH3+ cells and luciferase activity of Drosophila carrying esgts-GAL4-driven expression of lacZ cDNA, CAT cDNA, CAT cDNA with AD4 administration, CAT cDNA with ALA administration, Keap1 RNAi, Keap1 RNAi with AD4 administration, or Keap1 RNAi with ALA administration. The numbers of quantified guts from left to right are 18, 19, 20, 18, 18, 19, and 19. I- Data information: DAPI stained nuclei are shown in blue. Scale bars represent 10 μm Error bars represent SDs. Student's t-tests, *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001, and non-significant (NS) represents p > 0.05.I-L. Representative images of the midgut section from the R4 region of Drosophila carrying esgts-GAL4-driven expression of lacZ cDNA (I), Las RNAi (J), Las RNAi and CAT cDNA (K), or Las RNAi and Keap1 RNAi (L). esg-GFP (green) indicates ISCs and their differentiating cells. Dl staining (red) was used to visualize ISCs. Data information: DAPI stained nuclei are shown in blue. Scale bars represent 10 μm
Figure 5A. Volcano plots of differentially expressed genes in pair-wise comparison of 40-day Drosophila treated without ALA administration to 40-day Drosophila treated with 0.5 mM ALA administration. Blue symbols indicate significantly downregulated mass bins (Log2 FC < -0.6 and p < 0.05), red symbols indicate significantly upregulated mass bins (Log2 FC > 0.6 and p < 0.05), and gray symbols indicate mass bins that were not significantly changed.
Figure 6A-C. Immunofluorescence images of esg-GFP and Lysotracker staining with the midgut section from the R4 region in 14-day WT flies (A), 40-day WT flies (B), 40-day WT flies with ALA administration (C). esg-GFP (green; outlined by dotted lines), lysotracker (red). esg-GFP+ cells are outlined by red dotted lines in the images of lysotracker staining channel. D. Quantification of the dot number of Lysotracker in esg positive cells from experiments (A-C). n is indicated. The numbers of quantified guts from left to right are 9, 11, and 8. E. Quantification of the dot size of Lysotracker in esg positive cells from experiments (A-C). n is as indicated. F- Data information: DAPI stained nuclei are shown in blue. Scale bars represent 5 μm Error bars represent SDs. Student's t-tests, *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001, and non-significant (NS) represents p > 0.05.F-H. Expression of esg-GAL4-driven UAS-GFP-mCherry-Atg8a in 14-day Drosophila (F), 40-day Drosophila (G), 40-day Drosophila with ALA administration started at the middle age (26 days) (H). GFP (green) and mCherry (red). The red arrows indicate the autophagosomes. I. Quantification of the dot number of mCherry in esg positive cells from experiments (F-H). n is indicated. The numbers of quantified guts from left to right are 11, 10, and 12. J. Quantification of the dot size of mCherry in esg positive cells from experiments (F-H). n is as indicated. K- Data information: DAPI stained nuclei are shown in blue. Scale bars represent 2 μm Error bars represent SDs. Student's t-tests, *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001, and non-significant (NS) represents p > 0.05.K-L. Immunofluorescence images of esg-GFP and Lysotracker staining with the midgut section from the R4 region in 14-day flies carrying esgts-GAL4-driven UAS-lacZ (K), and 14-day flies carrying esgts-GAL4-driven Las RNAi (L). esg-GFP (green; outlined by dotted lines), lysotracker (red). esg-GFP+ cells are outlined by dotted lines. M. Quantification of the dot number of Lysotracker in esg positive cells from experiments (K-L). n is indicated. The numbers of quantified guts from left to right are 10, and 9. N. Quantification of the dot size of Lysotracker in esg positive cells from experiments (K-L). n is as indicated. O- Data information: DAPI stained nuclei are shown in blue. Scale bars represent 5 μm Error bars represent SDs. Student's t-tests, *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001, and non-significant (NS) represents p > 0.05.O-P. Expression of esg-GAL4-driven UAS-GFP-mCherry-Atg8a in 14-day Drosophila carrying esgts-GAL4-driven UAS-lacZ (flies were cultured at 18 °C and transferred to 29 °C after flies eclosion) (O), and 14-day Drosophila with Las depleted in ISCs and EBs (flies were cultured at 18 °C and transferred to 29 °C after flies eclosion) (P). GFP (green) and mCherry (red). The red arrows indicate the autophagosomes. Data information: DAPI stained nuclei are shown in blue. Scale bars represent 2 μm Error bars represent SDs. Student's t-tests, *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001, and non-significant (NS) represents p > 0.05.
Figure 7A-C. Immunofluorescence images of midgut section from the R4 region in 40-day flies (A), 40-day flies with spermidine administration started at 26th day after fly eclosion (B), 40-day flies with spermidine and ALA administration started at 26th day after fly eclosion (C). esg-GFP (green) indicates ISCs and their differentiating cells. Dl (red) staining was used to visualize ISCs. Data information: DAPI stained nuclei are shown in blue. Scale bars represent 10 μmF-I. Representative images of the midgut section from the R4 region of Drosophila carrying esgts-GAL4-driven expression of lacZ cDNA (F, control), Las RNAi (G), Las RNAi and Atg5 cDNA (H), or Las RNAi with spermidine administration (I). GFP (green) and Dl staining (red) was used to visualize ISCs. Data information: DAPI stained nuclei are shown in blue. Scale bars represent 10 μmN. Survival (percentage) of female Drosophila with indicated genotypes. The numbers of quantified Drosophila: 100 (UAS-lacZ), 100 (Las RNAi), 100 (Las RNAi + UAS-Atg5), and 100 (Las RNAi + UAS-Atg8a). Three independent experiments were conducted. Data information: Error bars represent SDs. p-values for lifespan curves (N) were calculated by the log-rank test. The statistical tests used in other panels were student's t-tests. *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001, and non-significant (NS) represents p > 0.05.
Figure 8A-E. Expressions of Rab5-GFP reporter in ISCs of 14-day WT Drosophila (A), 40-day WT Drosophila (B), 40-day Drosophila with ALA administration (C), 14-day Drosophila carrying esgts-GAL4>UAS-lacZ (D), and 14-day Drosophila carrying esgts-GAL4>Las RNAi (E). GFP (green). F. Quantification of fluorescence intensity of RAB5-GFP in experiments (A-E). Each dot corresponds to one cell. n is indicated. The numbers of quantified guts from left to right are 13, 11, 12, 10 and 13. G Data information: DAPI stained nuclei are shown in blue. Scale bars represent 2 μm Error bars represent SDs. Student's t-tests, **p < 0.01, ***p < 0.001, ****p < 0.0001, and non-significant (NS) represents p > 0.05.G-K. Expressions of Rab7-GFP reporter in ISCs of 14-day WT Drosophila (G), 40-day WT Drosophila (H), 40-day Drosophila with ALA administration (I), 14-day Drosophila carrying esgts-GAL4>UAS-lacZ (J), and 14-day Drosophila carrying esgts-GAL4>Las RNAi (K). GFP (green). L. Quantification of fluorescence intensity of RAB7-GFP in experiments (G-K). Each dot corresponds to one cell. n is indicated. The numbers of quantified guts from left to right are 11, 10, 11, 13 and 12. M Data information: DAPI stained nuclei are shown in blue. Scale bars represent 2 μm Error bars represent SDs. Student's t-tests, **p < 0.01, ***p < 0.001, ****p < 0.0001, and non-significant (NS) represents p > 0.05.M-Q. Immunofluorescence images of midgut section from the R4 region of Drosophila carrying esgts-GAL4-driven expression of lacZ cDNA (M, control), constitutively active form of RAB5 (N), constitutively active form of RAB5 with ALA administration (O), constitutively active form of RAB7 (P), or constitutively active form of RAB7 with ALA administration (Q). GFP (green) and Dl staining (red) was used to visualize ISCs. Data information: DAPI stained nuclei are shown in blue. Scale bars represent 10 μm
Figure 9A-D. Representative images of midgut sections from the R4 region of Drosophila carrying esgts-GAL4-driven expression of lacZ cDNA (A, control), Las RNAi (B), Las RNAi and RAB5-CA (C), or Las RNAi and RAB7-CA (D). GFP (green), Dl staining (red) was used to visualize ISCs. Data information: DAPI stained nuclei are shown in blue. Scale bars represent 10 μm
Figure 10C. Survival (percentage) of female Drosophila of indicated genotypes. The numbers of quantified Drosophila: 100 (UAS-lacZ), 100 (Las RNAi), 100 (Las RNAi + UAS-Rab5-CA) and 100 (Las RNAi + UAS-Rab7-CA). Three independent experiments were conducted Data information: Error bars represent SDs. p-values for lifespan curves (C) were calculated by the log-rank test. The statistical tests used in other panels were student's t-tests. *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001, and non-significant (NS) represents p > 0.05.F-I. Immunofluorescence images of dpERK staining of midgut sections of the R4 region of 40-day Drosophila (F), 40-day Drosophila with ALA administration (G), 14-day Drosophila carrying esgts-GAL4-driven UAS-lacZ (H), and Drosophila carrying esgts-GAL4-driven Las RNAi (I). dpERK (red). J. Quantification of the fluorescence intensity of dpERK in experiments (F-I). Each dot corresponds to one cell. n is indicated. The numbers of quantified guts from left to right are 11, 12, 12, and 13. K Data information: DAPI stained nuclei are shown in blue. Scale bars represent 10 μm Error bars represent SDs. The statistical tests used in other panels were student's t-tests. *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001, and non-significant (NS) represents p > 0.05.K-M. Representative images of midgut sections from the R4 region of Drosophila carrying esgts-GAL4-driven expression of lacZ cDNA (K, control), Las RNAi (L), or Las RNAi and dominant negative form of EGFR (EGFR-DN, M). GFP (green) and Dl staining (red) was used to visualize ISCs. Data information: DAPI stained nuclei are shown in blue. Scale bars represent 10 μm
Figure 1D. Representative time-lapse spinning disk confocal images of n = 3 of COS7 cells stably expressing GFP-TMD (ER) (green) and SiR-lysosome (orange). Zoom insets highlight regions of interest containing a static (upper panels) or mobile endosome (lower panels) as denoted by the white arrows. First row shows ER (green), the second row shows MDA generated ER movement (magenta), third row shows a merge of the two channels and the fourth row shows a merge of ER (green) and LE/Lys (orange). Scale bars: full size 10µm, zoom inset 3µm. Images relate to movies EV2 and 3. E. Kymograph of the mobile vesicle in panel (D). F. MDA quantification of (D). Mobility of static and mobile endosomes was quantified and normalized to the static endosomes. Graph represents mean ± s.d. of analyses at multiple locations within the same cell(n=20 cells per condition from 3 independent experiments). All images acquired for 90 frames at 4Hz. Significance two-tailed student t-test, **** P<0.0001.
Figure 2C. Representative time-lapse spinning disk confocal images of n = 3 of live COS7 cells stably expressing GFP-TMD (green) marked ER and SiR-lysosome-stained LE/Lys (orange) . Zoom insets highlight regions of interest containing a mobile endosome as denoted by the white arrow. First row represents ER (GFP-TMD) (green), the second row shows MDA generated ER movement (magenta), third row shows a merge of the two preceding channels and the fourth row shows a merge of ER (green) and LE/Lys (orange). Samples were treated with either DMSO or 2µm paclitaxel. Scale bar: 30µm and zoom insets 3µm. All images acquired for 90 frames at 1Hz.Images related to movie EV7 and 8 D. Kymograph of panel (C). E. MDA quantification of panel (C) normalized to control cells, showing the average ER movement surrounding LE/Lys under control or treated conditions and the overall average ER mobility under control or treatment conditions. Graph represents mean ±s.d. of analyses at multiple locations within the same cell (n = 20 cells per condition from 3 independent experiments). Significance two-tailed student t-test **** P<0.0001; ns = not significant. F. Representative images of n = 3 of COS7 cells stably expressing GFP-TMD (green) to mark the ER and SiR-lysosome stained LE/Lys (orange) merged. Zoom insets highlight region of interest containing a mobile endosome as denoted by the white arrow. First row represents ER (GFP-TMD) (green), the second row shows MDA generated ER movement (magenta), third row shows a merge of the two preceding channels and the fourth row shows a merge of ER (green) and LE/Lys (orange). Samples were treated with either siControl or siKTN1. Scale bar: 30µm and zoom insets 3µm. All images acquired for 90 frames at 1Hz. Images related to movie EV9 and 10 G. Kymograph of panel (F). H. MDA quantification of panel (F) normalized to control cells, showing the average ER movement surrounding LE/Lys under control or treated conditions and the overall average ER mobility under control or treatment conditions, respectively. Graph represents mean ±s.d. of analyses at multiple locations within the same cell (n=20 cells per condition from 3 independent experiments). Significance two-tailed student t-test. **** P<0.0001; ns = not significant
Figure 3A. Representative time-lapse spinning disk confocal images of n = 3 live COS7 cells stably expressing mCherry-KDEL (green) and transiently expressing GFP-RAB7 (orange). Zoom insets shows a region of interest containing a mobile RAB7-positive endosome as denoted by the white arrows. First row represents the ER (mCherry-KDEL) (green), the second row shows MDA-generated ER movement (magenta), third row shows a merge of the two preceding channels and the fourth row shows a merge of ER (green) and GFP-RAB7 (orange). Scale bar: 10µm, zoom insets 3µm. Images related to movie EV11. Images were acquired for 90 frames at 1Hz.B. Kymograph of panel (A). C. MDA quantification of panel (A) and figures EV2A-G normalized to 1 showing average ER movement surrounding static endosomes and mobile endosomes. Graph represents mean ±s.d. of analyses at multiple locations within the same cell (n=15 cells per condition from 3 independent experiments). All images acquired for 90 frames at 1Hz. Significance two-tailed student t-test. *P<0.05, ** P<0.01, **** P<0.0001 ns = not significant. E. Representative time-lapse spinning disk confocal images of n = 3 of live COS7 cells stably expressing GFP-TMD (green) and in lower panels transiently expressing mScarlet-RILP (magenta) and SiR-lysosome-stained LE/Lys (orange). Zoom insets shows region of interest containing ER (GFP-TMD). First row represents ER (GFP-TMD) (green), the second row shows MDA-generated ER movement (magenta), third row shows a merge of the two preceding channels. Scale bar: 10µm, zoom insets 3µm. Images related to movie EV19 and movie EV20. Images were acquired for 90 frames at 1Hz. F. MDA quantification of panel (E) and figure EV3A normalized to 1 showing total average ER movement. Graph represents mean ±s.d. of analyses at multiple locations within the same cell (n=15 cells per condition from 3 independent experiments). All images acquired 90 frames at 1Hz. Significance two-tailed student t-test. **** P<0.0001 ns = not significant.
Figure 4B. Representative stills of spinning disk confocal images of n = 3 of COS7 cells stably expressing TMD-GFP (green) and SiR-lysosome-stained endosomes/lysosomes (orange). COS7 cells in the middle panels overexpress mCherry-RILP (magenta). The COS7 cells in the lower panels overexpress mCherry-TMEM55B (magenta). Zoom insets show region of interest containing the ER (TMD-GFP) (green) and junction analysis of the skeletonized ER where the number of ER junctions representing the quantified average. Scale bars: 15µm. zoom insets: 3µm. C. Quantification of the number of ER junctions per µm2 from panel (B) as resulted from ER junction analysis. Graph represents mean ±s.d. of analyses at multiple locations within one cell (n=15 from 3 independent experiments). Significance two-tailed student t-test. ***P<0.001.