EMBO/SourceData huggingface dataset:
Figure 5Detection of Pbs2 phosphorylation at S514 The yeast strains KT003 (pbs2Δ), KT005 (ste11Δ pbs2Δ), TM280 (ssk2/22Δ pbs2Δ) and KT043 (ste11Δ ssk2/22Δ pbs2Δ) were transformed with YCplac22I'-Pbs2-HA, and were treated with the indicated concentrations of NaCl for 5 min. Pbs2-HA was immunoprecipitated from cell extract, and phosphorylated Pbs2 was analyzed by (A) Phos-tag band-shift assay In (A), the positions of Pbs2-HA phosphorylated (S514-P) and unphosphorylated (S514-OH) at S514 are indicated.Detection of Pbs2 phosphorylation at T518. The yeast strains KT003 (pbs2Δ), KT005 (ste11Δ pbs2Δ), TM280 (ssk2/22Δ pbs2Δ) and KT043 (ste11Δ ssk2/22Δ pbs2Δ) were transformed with YCplac22I'-Pbs2-HA, and were treated with the indicated concentrations of NaCl for 5 min. Pbs2-HA was immunoprecipitated from cell extract, and phosphorylated Pbs2 was analyzed by (B) anti-phospho-T518 immunoblotting.C-F. NaCl dose-response analyses of Pbs2 phosphorylation. (C-D) KT005 (ste11Δ pbs2Δ) and (E-F) TM280 (ssk2/22Δ pbs2Δ) were transformed with YCplac22I'-Pbs2-HA, and were treated with the indicated concentrations of NaCl for 5 min. (C and E) S514 phosphorylation was analyzed using the Phos-tag band-shift assay. PC; Positive Control. (D and F) T518 phosphorylation was analyzed using anti-phospho-T518 immunoblotting. G-H. Average values of three independent experiments from (C-D) and (E-F), respectively, were plotted. AU, arbitrary unit. Data information: (C-F) Representative results from three independent experiments. (G-H) Error bars are SEM (n=3).I. Detection of di-phosphorylated Pbs2. KT005 (ste11Δ pbs2Δ) transformed with YCplac22I'-Pbs2-HA was treated with the indicated concentrations of NaCl for 5 min. Pbs2-HA was immunoprecipitated from cell extracts, and subjected to Phos-tag SDS-PAGE. Blots of these gels were probed with (upper panel) anti-phospho-T518 or (lower panel) anti-HA. J. Same as in (I), except that the yeast strain KT003 (pbs2Δ) was used.
Figure 6B. Phos-tag band-shift analyses of osmostress-induced Hog1 phosphorylation. KT005 (ste11Δ pbs2Δ) was transformed with YCplac22I'-Pbs2 -HA (WT) or its indicated mutant derivatives. Cells were stimulated with (+) or without (-) 0.6 M NaCl for 5 min.C-F. Phos-tag band-shift analyses of Hog1 phosphorylation. KT291 (ste11Δ pbs2Δ hog1Δ) was transformed with (C and D) pRS416-Hog1 or (E and F) pRS416-Hog1-ΔL16, together with (C and E) YCplac22I'-Pbs2-S514A-HA or (D and F) YCplac22I'-Pbs2-T518A-HA. Cells were stimulated with the indicated concentrations of NaCl for 5 min. G-H. Average values of three independent experiments from (C and E) and (D and F), respectively, are plotted. Data information: (C-F) Representative results from three independent experiments. (G-H) Error bars are SEM (n=3).
Figure 7A Phos-tag band-shift assay of Hog1 phosphorylation. KT235 (ΔS/O/H/M ssk2/22Δ hog1Δ STE11-Q301P) was transformed with pRS416-Hog1 (WT) or its indicated mutant derivatives. Cell extracts were prepared from fresh cultures without applying osmostress. For each HOG1 mutant plasmid, three independent cultures were assayed. Data information: Error bars are SEM (n=3).B. the yeast strains KT260 (ssk2/22Δ ste11Δ hog1Δ), KT235 (ΔS/O/H/M ssk2/22Δ hog1Δ STE11-Q301P), and KT248 (ΔS/O/H/M ssk2/22Δ hog1Δ pbs2Δ) carrying YCplac22I'-Pbs2-DD, were used. Data information: Error bars are SEM (n=3).C. KT250 (ΔS/O/H/M ssk2/22Δ hog1Δ STE11-WT) and KT235 (ΔS/O/H/M ssk2/22Δ hog1Δ STE11-Q301P) were transformed with pRS416-Hog1 (WT) or pRS416-Hog1-N149H D162G (N149H D162G) together with pRS414-8xCRE-lacZ. Expression of the Hog1 reporter gene 8xCRE-lacZ in the absence of osmostress was assayed. Data information: (C) Error bars are SEM (n=4).D. KT248 (ΔS/O/H/M ssk2/22Δ hog1Δ pbs2Δ) was transformed with pRS416-Hog1 (WT) or its indicated mutant derivatives together with pRS414-8xCRE-lacZ. Expression of the Hog1 reporter gene 8xCRE-lacZ in the absence of osmostress was assayed. Data information: Error bars are SEM (n=3).E-F. Phos-tag band-shift assay of Hog1 phosphorylation. Yeast strains of the indicated genotypes (shown below the graph) were transformed with pRS416-Hog1 (WT) or its indicated mutant derivatives (shown inside the graph). Strain used: (E) FP4, KT259, KT260, KT292, and KY523; and (F) KY523, KT293, KT294, and KT295. N/H, N149H; D/G, D162G. Data information: Error bars are SEM (n=3).
Figure 8A. KT299 (MATa hkr1Δ msb2Δ ssk2/22Δ) was exposed to the indicated concentrations of α-factor for 15 min in the absence of osmostress. Phosphorylation of Fus3 and Kss1 was detected by immunoblotting.B. KT299 (MATa ssk2/22Δ hkr1Δ msb2Δ) was exposed to the indicated concentrations of α-factor for 15 min in the presence or absence of 0.8 M NaCl, and Hog1 phosphorylation was determined using the Phos-tag band-shift assay. Data information: (B) Representative results from three independent experiments.C. Average values of four independent experiments were plotted. Data information: Error bars are SEM (C) n=4D. HM06-1 (MATa ΔS/O/H/M ssk2/22Δ) was exposed to the indicated concentrations (log scale) of α-factor for 15 min in the presence or absence of 1.0 M NaCl, and Hog1 phosphorylation was determined using the Phos-tag band-shift assay. Average values of three or more independent experiments were plotted. Data information: Error bars are SEM: (D), n=3 or moreE. KT306 (MATa hkr1Δ msb2Δ ssk2/22Δ hog1Δ) was transformed with pRS416-Hog1 (WT) or pRS416-Hog1-N149H D162G (N/H D/G), and was exposed to 10 μM α-factor for the indicated time in the absence of osmostress, and Hog1 phosphorylation was determined using the Phos-tag band-shift assay. Average of three independent experiments are plotted. Data information: Error bars are SEM (E) n=3.G. Typical FRET (YFP/CFP ratio) images showing p38 activation. HeLa cells carrying the p38 reporter PerKy-p38 (Tomida et al., 2015) were stably transfected with an expression vector for the indicated p38α mutant proteins. FRET analysis was performed as described in Materials and Methods. H. Distribution of p38 activity in individual cells from sets (a) - (d) in (G). Data information: (G) Scale bars: 20 μm. (H) Statistics, Student's two-tailed t-test.
Figure 9A. An example of the time-course experiments for the osmostress-induced Hog1 phosphorylation. The yeast strain KY603-3 (ΔS/O/H/M ssk2/22Δ STE11-Q301P) was stimulated with 1.0 M NaCl for the indicated times, and the percentage of phosphorylated Hog1 (Hog1-P) was determined using a Phos-tag band-shift assay.Compilations of the time-courses of osmostress-induced Hog1 activation in (B) KY603-3 (ΔS/O/H/M ssk2/22Δ STE11-Q301P), For clarity, time-course curves are shown in two panels for lower and higher ranges of NaCl concentrations. Data information: For each data point, n=1 or more.Compilations of the time-courses of osmostress-induced Hog1 activation in (C) TM257 (ssk2/22Δ), and (D) TM142 (wild-type). For clarity, time-course curves are shown in two panels for lower and higher ranges of NaCl concentrations. The color chart below (D) indicates the concentrations of NaCl used. Data information: For each data point, n=1 or more.E. Effects of Hog1 kinase activity and osmostress-induced glycerol accumulation on the time-courses of Hog1 activation. Cells were stimulated with 0.4 M NaCl (left panel) or 1.6 M NaCl (right panel) for the indicated times, and the percentage of phosphorylated Hog1 was determined using Phos-tag band-shift assay. Strains used were: TM142 (WT), KT254 (gpd1Δ gpd2Δ stl1Δ), and TM232 (hog1Δ) carrying pRS416-HOG1-K52S K53N. K/S K/N, K52S K53N; gpd1/2, gpd1Δ gpd2Δ. Data information: (E) Error bars are SEM (n=3 or more).
Figure 1(A) Representative kymographs showing tetramethylrhodamine (TMR)-labeled DDB movement on each type of recombinant MT lattice, as indicated. Scale bars, 5 μm and 25 sec. Pink arrowhead marks a diffusive DDB complex. See also Movie EV1. (B) Quantification of DDB velocity on MT lattices lacking each of the tubulin-CTTs (n ≥ 100 DDB complexes per condition from at least three independent experiments). No statistical difference was observed between WT and mutant MTs (P ≥ 0.1, unpaired t test) (C-D) Quantification of the number of processive (C), or diffusive (D) DDB complexes relative to WT MTs in the same chamber (n ≥ 10 MTs quantified for each condition from at least three independent experiments). Processive (unidirectional motion exceeding 0.5 μm) and diffusive (back-and-forth motion) events were scored in a field of view and then divided by the lengths of MTs and time, thus normalizing to a value of number of motility events per μm MT per sec. Error bars SD.(E-F) TIRF images of 1 nM TMR-labeled GST-hDyn (2 mM ATP) (E), or 0.3 nM TMR-labeled p150 (F) molecules (green) bound to either Δα-CTT (top), or Δβ-CTT MTs (bottom). Pink arrows show mutant MTs in both the raw, and SD map images, highlighting differences in binding between WT and mutant MTs that are apparent in the SD map. Right, standard deviation maps from an entire time sequence reveal ensemble binding and dissociation events that lead to variations in pixel intensities (see Methods). Scale bars are 5 μm. (G) Quantification of mean fluorescence intensity (arbitrary units) per μm MT for GST-hDyn (2 mM ATP) or p150 bound to the indicated mutant MT relative to WT MTs in the same chamber. Image shows first frame from time series. The intensity of GST-hDyn was quantified from maximum intensity projections of the entire time sequence due to transient binding of GST-hDyn to the MT (n ≥ 10 MTs quantified for each condition from at least three independent experiments). Error bars represent SD. P value (unpaired t test) of Δα-CTT vs. Δβ-CTT MTs = 0.5208 for GST-hDyn, and ≤ 0.0001 for p150.
Figure 2(A) TIRF image of TMR-labeled DDB molecules (green) bound to either tyrosinated (red) or detyrosinated (blue) MTs. A standard deviation map of the whole time sequence is shown, revealing the preferential association of DDB with tyrosinated MTs versus detyrosinated MTs (pink arrow). Representative kymographs of DDB movement are shown from each type of MT present in the same chamber. Scale bars are 5 μm and 25 sec. See also Movie EV2. (B-C) Quantification of the number of processive (B) or diffusive (C) DDB complexes per μm MT per sec on detyrosinated MTs relative to tyrosinated MTs in the same chamber (n ≥ 20 MTs quantified for each condition from three independent experiments). Error bars represent SD. Data from Δα-CTT MTs (Fig. 1) are re-plotted for comparison. (D) Quantification of the frequency of processive DDB molecules as a function of the amount of tyrosinated tubulin incorporated into the lattice normalized to fully tyrosinated MTs. Data points from two independent experiments are shown.(E) TIRF images of 0.3 nM TMR-labeled p150 (top) or 1 nM TMR-labeled GST-hDyn (bottom) molecules (green) bound to either tyrosinated (red) or detyrosinated (blue) MTs. Right, standard deviation maps of protein binding over an entire time sequence and kymographs from either tyrosinated or detyrosinated MTs are shown. Scale bars are 5 μm and 25 sec. (F) Quantification of mean fluorescence intensity (arbitrary units) per μm MT for TMR-labeled GST-hDyn (2 mM ATP) or p150 bound to the indicated mutant MT relative to WT MTs in the same chamber. The intensity of GST-hDyn was quantified from maximum intensity projections of the entire time sequence due to transient binding of GST-hDyn to the MT. (n ≥ 10 MTs quantified for each condition from at least three independent experiments). Error bars represent SD.
Figure 3(A) Immunoblot of brain tubulin with or without carboxypeptidase A (CPA). Note CPA specifically removes the α-tubulin C-terminal tyrosine without affecting other PTMs.(B) TIRF image of TMR-labeled DDB molecules (green) on either WT (red) or CPA-treated (blue) pig brain MTs. Standard deviation map of the entire time sequence shows DDB preference for WT MTs and kymographs from either WT or CPA-treated are shown. Scale bars are 5 μm and 25 sec. (C) Quantification of the number of processive DDB complexes per μm MT per sec on the CPA-treated MTs, relative to WT MTs in the same chamber (n ≥ 7 MTs of each type quantified from at least three independent experiments). Error bars represent SD.(D) TIRF images of 0.3nM TMR-labeled p150 (top) or 1nM TMR-labeled GST-hDyn (bottom) molecules (green) bound to either WT (red), or CPA-treated MTs (blue). Right, standard deviation maps of protein binding over an entire time sequence and kymographs from either WT or CPA-treated are shown. Scale bars are 5 μm and 25 sec for p150, and 5 μm and 12 sec for GST-hDyn (E) Quantification of mean fluorescence intensity (arbitrary units) per μm MT for TMR-labeled GST-hDyn (2mM ATP) or p150 bound to CPA-treated MTs relative to WT MTs in the same chamber. The intensity of GST-hDyn was quantified from maximum intensity projections of the entire time sequence due to transient binding of GST-hDyn to the MT (n ≥ 10 MTs quantified for each condition from at least three independent experiments). Error bars represent SD.
Figure 4(A) Schematic of the p150 constructs used. The p135 isoform lacks the CAP-Gly domain, but retains part of the adjacent basic domain (red) and coiled-coil domains (blue). Right, Coomassie blue stained gel of the purified p150 and p135 proteins. Molecular weight markers are indicated.(B) TIRF image of either p150 (0.3 nM), or p135 (0.3 or 6 nM) bound to either WT (red), or CPA-treated porcine MTs (blue). Note: no binding of p135 is observed at comparable concentrations to p150 indicating the lower binding affinity of this isoform. Proteins were visualized by fluorescence from the GFP tag fused to each construct.(C) Still images from a TIRF time-series of p135 (green) binding to either WT (red), or CPA-treated porcine MTs (blue). Right, standard deviation map of p135 binding shows no preference for either type of MT, and quantification of mean fluorescence intensity (arbitrary units) per μm MT for p135 bound to CPA-treated MTs relative to WT MTs in the same chamber (n ≥ 10 MTs quantified for each condition from three independent experiments). Scale bars are 5 μm.
Figure 5(B) Example of a chimeric MT generated from recombinant yeast tubulin containing tyrosinated (red) and detyrosinated (blue) sections. Most TMR-labeled DDB molecules (green) move processively through the annealed junction between the two types of MT lattice (65%, n=836 processive complexes, 65 MT-MT junctions, three independent experiments). Diffusive DDB molecules (white arrow) are primarily observed on the tyrosinated section of the MT and do not diffuse across the boundary. Right, video frames showing a processive DDB complex (pink arrowhead) moving across the junction (yellow arrowhead) of tyrosinated and detryosinated MT. The (+) and (-) signs denote MT polarity inferred from the directionality of DDB movement. Scale bars are 5 μm and 25 sec. See also Movie EV3.(C) TIRF images of low (0.3 nM) and high (10 nM) concentrations of TMR-labeled p150 (green) bound to chimeric yeast MTs containing tyrosinated (red) and detyrosinated (blue) sections of MT. Representative kymographs below show diffusive behavior of p150 molecules on the MT. Note that p150 rarely diffuses into the detyrosinated section of MT, even at high concentrations. Scale bars are 5 μm and 10 sec.(D-E) TIRFimages and kymographs of annealed WT and CPA-treated porcineMTs(D), or annealed WT MTs(E). The majority of DDB complexes (78%, n=960 processive complexes, 45 MT-MT junctions, three independent experiments) move processively across the boundary between WT and CPA-MTs(D). Note TMR-labeled DDB complexes (green) in (E) traverse the annealed boundary without pausing (93%, n=677 processive complexes, 45 MT-MT junctions, three independent experiments), suggesting that the annealed junction does not affect DDB motility.(F) TIRF image and kymograph from a chimeric MT composed of WT (red) and subtilisin-treated porcine MTs (blue). Note some DDB complexes (pink arrows) traverse the boundary and continue moving along the subtilisin-treated section of the MT (41%, n=709 processive complexes, 56 MT-MT junctions, 3 independent experiments). All scale bars in D-F are 5 μm and 25 sec.
Figure 1.(A) UASp-GFP-mCherry-DrAtg8a/+;nosGAL4/+ flies conditioned on yeast paste had diffuse GFP-mCherry-DrAtg8a staining in midstage egg chambers. (B) Nondegenerating midstage egg chambers from starved flies contained autophagosomes (yellow) and autolysosomes (red). (C and D) Egg chambers early in the degeneration process showed follicle cells that take up portions of the nurse cell cytoplasm (C) followed by condensation and fragmentation of the nurse cell nuclei and further uptake of the nurse cell cytoplasm into follicle cells (D). (E) Late stage degenerating egg chambers lose all GFP staining and fluoresce red.(F) Fed Dcp-1Prev1/Dcp-1Prev1;UASp-GFP-mCherry-DrAtg8a/nosGAL4 flies showed diffuse GFP-mCherry-DrAtg8a staining in the germline. (G) Starved Dcp-1Prev1/Dcp-1Prev1;UASp-GFP-mCherry-DrAtg8a/nosGAL4 flies showed reduced autolysosomes in degenerating midstage egg chambers. (H and I) Fed flies overexpressing truncated Dcp-1 (tDcp-1) in the germline showed increased autophagosomes and autolysosomes in nondegenerating midstage egg chambers (H) and also contained degenerating midstage egg chambers that lose all GFP fluorescence and fluoresce red (I). Bars: (main images) 25 µm; (insets) 12.5 µm. Insets in A-I show diffuse cytoplasmic staining of Atg8a or autophagosomes and autolysosomes. (J and K) The percentages of autolysosomes (autolysosomes/total autophagic structures) were manually calculated in at least eight egg chambers for each genotype as indicated. Error bars represent the means ± SD. Statistical testing was performed using one-way ANOVA with a Dunnet post test (****, P < 0.0001) or a two-tailed Student's t test (**, P < 0.005).
Figure 2.(A) Drosophila S2 cells stably expressing GFP-RFP-Atg8a showed an increase in the percentage of cells containing two or more autolysosomes after starvation, which was blocked after Bafilomycin A1 (BafA1) treatment. At least 50 cells were manually quantitated in three independent experiments (n = 3). Statistical significance was determined using one-way ANOVA with a Dunnett post test (**, P < 0.01). (B) Representative images of S2-GFP-RFP-Atg8a cells after the indicated treatments.(C) S2-GFP-RFP-Atg8a cells were treated with dsRNAs and subjected to fed or starvation conditions as indicated. At least 50 cells were manually quantitated in three independent experiments (n = 3). Statistical significance was determined using one-way ANOVA with a Dunnett post test (**, P < 0.01; ***, P < 0.001; ****, P < 0.0001). (D) Representative images of S2-GFP-RFP-Atg8a cells after the indicated RNAi treatments. Error bars represent the means ± SD. Bars, 10 µm.
Figure 3.(A) Nondegenerating midstage egg chambers from fed w1118flies showed Ref(2)P staining in follicle cells and nurse cells. (B) Starved w1118flies contained degenerating midstage egg chambers with reduced Ref(2)P.(D) Starved Atg7flies showed an accumulation of Ref(2)P in the follicle cells and nurse cells of degenerating midstage egg chambers. (E) Starved Dcp-1Prev1flies contained increased levels of Ref(2)P in degenerating midstage egg chambers.(C) A representative Western blot of ovaries from w1118 and Atg7d77/d14 flies subjected to fed or starvation conditions for 4 d. Ref(2)P was detected by immunoblotting. Actin served as a loading control. Densitometry was performed to quantitate Ref(2)P protein levels relative to actin. Graph represents ± SD from five independent experiments (n = 5). Statistical significance was determined using a two-tailed Student's t test. *, P = 0.004 for fed samples; *, P = 0.008 for starved samples.(F) A representative Western blot of ovaries from w1118 and Dcp-1Prev1 flies that were subjected to fed or starvation conditions for 4 d. Ref(2)P was detected by immunoblotting. Actin served as a loading control. Densitometry was performed to quantitate Ref(2)P protein levels relative to actin. Graph represents ± SD from five independent experiments (n = 5)
Figure 4.(A and B) l(2)mbn cells were labeled with antibodies to Dcp-1 and ATPsyn-α (A) or MitoTracker red (MTR; B). Merged images show colocalization between Dcp-1 and the mitochondria. Boxes represent zoomed images. Bars: (main images) 5 µm; (zoomed images) 1.25 µm.(C) Western blot from l(2)mbn cells subjected to nutrient-rich or starvation conditions for 6 h. Cells were separated into cytosolic (C) and mitochondrial enriched (M) fractions.(D) Ovaries from fed w1118 flies were separated into cytosolic and membrane-enriched fractions and probed with antibodies to VDAC, Tubulin, ATPsyn-α, and Dcp-1.(E and F) Intact and lysed mitochondria (E) or intact mitochondria isolated from l(2)mbn cells (F) were treated with proteinase K (PK). The effects of proteinase K treatment were assessed by antibodies to VDAC, ATPsyn-α, Pink1, and Dcp-1.(E and F) Intact and lysed mitochondria (E) or intact mitochondria isolated from l(2)mbn cells (F) were treated with proteinase K (PK). The effects of proteinase K treatment were assessed by antibodies to VDAC, ATPsyn-α, Pink1, and Dcp-1.(G) Control and Dcp-1 RNAi-treated cells were subjected to nutrient-rich or starvation conditions and stained with NAO. Mean fluorescence was measured by flow cytometry. Graph represents ± SEM of three independent experiments (n = 3).
Figure 5.(A) l(2)mbn cells were labeled with the ATPsyn-α, and mitochondrial morphology was scored as fragmented, normal, or elongated. (B) Cells were treated with control or Dcp-1 dsRNA and subjected to nutrient-rich media or 1 h of starvation. Quantifications represent the percentage of cells with elongated mitochondria divided by the total number of cells examined. At least 100 cells were examined manually in three independent experiments (n = 3). Error bars represent the mean ± SD. Statistical significance was determined using one-way ANOVA with a Bonferroni post test (*, P < 0.05; **, P < 0.01).(C) Mitochondrial targeted GFP (mitoGFP) was expressed in the germline using the nosGAL4 driver. Staining shows mitoGFP, Armadillo, and DNA. (D) Mitochondria were scored as healthy (H), clustered (C), or elongated and overly connected (E). All of mitochondria from fed UASp-mitoGFP/+;nosGAL4/+ flies were scored as healthy. n = 15 egg chambers manually scored. (E) mitoGFP was expressed in Dcp-1Prev1 flies using the nosGAL4 driver. (F) 54% of egg chambers from UASp-mitoGFP/+;Dcp-1Prev1/Dcp-1Prev1;nosGAL4/+ flies contained elongated mitochondria, 39% contained mitochondria that were scored as healthy, and 7% contained clustered mitochondria. n = 28 egg chambers manually scored.
Figure 6.(A) Total cellular ATP levels were measured in l(2)mbn cells treated with control or Dcp-1 dsRNA. Data represent ± SEM of three independent experiments (n = 3). Statistical significance was determined using a two-tailed Students t test (*, P = 0.02).(B) Total cellular ATP levels were measured in ovaries from fed or starved w1118 and Dcp-1Prev1 flies. Data represent ± SEM of five independent experiments (n = 5). Statistical significance was determined using a two-tailed Student's t test (**, P = 0.014; ***, P < 0.001).(C) Fed or starved w1118 and Dcp-1Prev1 flies were treated with DMSO or 25 µg/ml oligomycin A, and Ref(2)P levels were assessed by immunoblot analysis. Actin served as a loading control. Densitometry was performed to quantitate protein levels relative to actin. Graph represents ± SD from three independent experiments (n = 3). Statistical significance was determined using a two-tailed Student's t test (*, P = 0.02).(D and E) Control UASp-GFP-mCherry-DrAtg8a/+;nosGAL4/+ flies (D) and Dcp-1Prev1/Dcp-1Prev1;UASp-GFP-mCherry-DrAtg8a/nosGAL4 flies (E) were subjected to starvation conditions supplemented with DMSO or 25 µg/ml oligomycin A. Bars, 25 µm. Quantifications show percentage of autolysosomes (autolysosomes/total autophagic structures). At least eight egg chambers were manually quantitated per genotype per condition (n = 8). Statistical testing was determined using a two-tailed Student's t test. ***, P = 0.0002.