EMBO/SourceData huggingface dataset:
Figure 7A Representative confocal images of the Golgi apparatus in WT or PTAR1 KO HeLa cells. Cells were co-immunostained for GM130 (a cis-Golgi marker) and golgin-97 (a trans-Golgi marker). Images were deconvoluted using Huygens software. The lower panels show magnified images of the boxed region of the upper panels. Scale bars, 5 μm.B Electron micrographs of the Golgi apparatus in WT or PTAR1 KO HAP1 cells. Arrows indicate Golgi stacks. Arrowheads indicate examples of unfused vesicles accumulated around the swollen Golgi cisternae in PTAR1 KO cells. Scale bars, 500 nm.Defect in intra-Golgi trafficking in PTAR1 KO cells. (C) VSVG-GFP expressing WT and PTAR1 KO HeLa cells were cultured at 40ºC and then shifted to 32ºC. VSVG-GFP fluorescence images taken at the indicated times after the temperature shift are shown. The right panel shows quantification of VSVG-GFP fluorescence in the Golgi region after the temperature shift (mean ± SEM, n = 6).Defect in intra-Golgi trafficking in PTAR1 KO cells. (D) VSVG-GFP expressing WT HeLa cells, PTAR1 KO HeLa cells, and PTAR1 KO HeLa cells stably expressing PTAR1 (KO + PTAR1) were cultured at 40ºC and then shifted to 32ºC. At the indicated time points, cell surface proteins were biotinylated using sulfo-NHS-LC-biotin. Biotinylated VSVG-GFP was purified from cell lysates using avidin agarose and analyzed by immunoblotting with anti-GFP antibody. The right panel shows quantification of the cell surface biotinylated VSVG-GFP (means ± SEM, n = 3). Data were analyzed by one-way ANOVA with Dunnett's post-hoc test. *p < 0.05, ***p < 0.001.E Analysis of LAMP1 glycosylation. Cell lysates of WT HeLa cells, PTAR1 KO HeLa cells, and PTAR1 KO HeLa cells stably expressing PTAR1 (KO + PTAR1) were analyzed by immunoblotting with anti-LAMP1 antibody (upper). Sialylated LAMP1 was precipitated from the cell lysates using Maackia amurensis leucoagglutinin (MAL) agarose and analyzed by immunoblotting (lower).F Defect in the Golgi SNARE assembly in PTAR1 KO cells. The Golgi SNARE complex was immunoprecipitated from NEM-treated WT HAP1 cells, PTAR1 KO HAP1 cells, and PTAR1 KO HAP1 cells stably expressing PTAR1 (KO + PTAR1) using control mouse IgG, anti-GS28 IgG, or anti-syntaxin 5 IgG. Immunoprecipitates were analyzed by immunoblotting with antibodies against syntaxin 5, GS28, GS15, and Ykt6. Syntaxin 5 has two isoforms with different translation initiation sites. Inputs were 20% (syntaxin 5, GS28, and GS15) and 2% (Ykt6). The data shown are representative of three independent experiments with similar results.
f1(a) Morphological analysis. Jurkat T cells were cultured in the presence and absence of the indicated anticancer drugs for 48 h. Drug-treated cells were classified as normal, apoptotic or abnormal, with enlarged and irregular nuclei, with multipolar mitoses or multinucleated. Cultures treated with etoposide (0.25 μM), cisplatin (3 μM), taxol (4 nM) and nocodazole (10 nM) exhibited high levels of cells with abnormal nuclei. None of the treated populations showed a significant fraction of apoptosis (see also Supplementary Fig. S1). Values are means±s.d. for three independent experiments. Right: representative examples of these morphological categories are shown. Scale bar, 10 μM. Similar abnormalities were also seen after treating NB4 and MDA-MA-231 cells with etoposide or cisplatin (Supplementary Fig. S2).(b) Immunoblotting. Jurkat T cells were treated as indicated and ATG5 (monomeric and ATG12-conjugated), ATG12 (conjugated with ATG5), LC3 (18 and 16 kDa), Beclin 1 and GAPDH detected. Chloroquine (CQ) was employed to block lysosomal proteases. Each immunoblot is representative of at least three independent experiments. The same assays were performed using NB4 and MDA-MA-231 cells (Supplementary Fig. S2). Moreover, as a marker for autophagy onset, increased LC3-II formation following etoposide or cisplatin treatment was also documented using fluorescence microscopy (Supplementary Fig. S2). Full-length immunoblots are provided in Supplementary Fig. S8.
f2(a) Time-lapse microscopy. HeLa H2B-mCherry-α-tubulin-EGFP cells were cultured in the presence and absence of etoposide and cisplatin, respectively. Treated cells frequently developed multiple nuclei, including micronuclei (upper panel), and demonstrated evidence of multipolar spindles and misaligned chromosomes (lower panel). Cells were also much larger than untreated cells (see also Supplementary Fig. S3). Scale bar, 10 μm. (b) Statistical analysis of the data shown above. At least 100 cells were counted for each drug exposure time according to the classification used in Fig. 1. Values are means±s.d. (n=3).
f3(a) Immunoblotting. Jurkat T cells were cultured as indicated for 48 h. Only under conditions of ATG5 induction was evidence of increased autophagic activity obtained. Monomeric ATG5 (shown under the dotted line) was detected after a longer exposure time compared with the ATG5 conjugated with ATG12. Results are representative of three independent experiments.(b) Morphological analysis. Jurkat T cells were cultured as in a. Values are means±s.d. of three independent experiments.c) Morphological analysis. Jurkat T cells were treated with the indicated drugs or transduced with lentivirus ATG5, ATG5-K130R, Beclin 1 or control constructs for 48 h. Enlarged and multinucleated cells were seen as a consequence of ATG5 or ATG5-K130R lentiviral gene transfer or of etoposide treatment. Increased Beclin 1 levels or rapamycin treatment had no such effect. Representative examples of morphology are shown. Scale bar, 10 μm. Right: statistical analysis of the data. At least 100 cells were counted for each condition. Values are means±s.d. (n=3).(d) Immunoblotting. Enforced expression of ATG5, Beclin 1, or ATG5-K130R following lentiviral gene transfer.(e) Time-lapse microscopy. HeLa H2B-mCherry-α-tubulin-EGFP cells were transduced by lentiviral gene transfer as indicated. Only ATG5-overexpressing cells demonstrated evidence for mitotic catastrophe (see also Supplementary Movies). As with the GFP control, the Beclin 1 construct also included GFP, hence the intensity in green was very high. Scale bar, 10 μm.
f4(a) Cell cycle analysis. After lentivirus gene transfer, Jurkat T cells overexpressing ATG5 or GFP were followed for the indicated times and analysed for DNA content by flow cytometry. Untransduced cells were left untreated or treated with etoposide for comparison. Values are means±s.d. (n=3). Right: representative flow cytometry diagrams for the 48 h time point.(b) Cell cycle analysis. Jurkat cells were cultured as indicated for 48 h. Only under conditions of ATG5 induction, we observed an accumulation of cells in G2- or M-phase arrest. Results are representative of three independent experiments.(c) Immunoblotting. Jurkat T cells overexpressing ATG5 or GFP were cultured for the indicated times after transduction and analysed. As controls, cells were treated with etoposide or rapamycin. Although rapamycin, similar to etoposide, induced autophagy, no increase in ATG5 expression and no cell cycle arrest were observed. ATG5 overexpression and etoposide treatment resulted in a similar expression pattern for all proteins investigated. Each immunoblot is representative of at least three independent experiments.
f5(a) Flow cytometry. Untreated Jurkat T cells, cells treated with etoposide continuously (0.25 μM), or transduced with lentivirus ATG5 or GFP were cultured for 48 h, fixed, permeabilized and exposed to antiphospho-H2AX (Ser139) antibody, then stained with antimouse-APC-conjugated antibody, and analysed using a flow cytometer.(b) Confocal microscopy. Untreated HeLa cells, cells treated with etoposide continuously (0.25 μM), or transduced with lentivirus ATG5 were cultured for 48 h. Additional DAPI nuclear staining was used. Scale bar, 10 μm. Right: phospho-H2AX was quantified by measuring the mean fluorescence intensity (MFI) in five high-power fields of each condition using IMARIS software. Values are means±s.d.(c) Jurkat T cells were treated as in a and analysed by immunoblotting. Besides phospho-H2AX (Ser139), we also detected phospho-ATM (Ser1981) and phospho- ATR (Ser428), two additional markers of DNA damage response. Intensity of the protein bands were quantified with a Licor/Odyssey scanner and software (shown beneath each immunoblot). The fold change in phosphorylation levels compared with no treatment (untreated) are presented. The data in all panels are representative of at least three independent experiments. Full-length immunoblots are provided in Supplementary Fig. S9.
f6(a) Immunoblotting. Jurkat T cells overexpressing ATG5 or control cells were cultured in the presence and absence of 3-MA for 48 h. 3-MA blocked the formation of LC3-II and p62 degradation, indicating that it indeed inhibited ATG5-induced autophagy. Results are representative of three independent experiments.(b) Cell cycle analysis. Normal Jurkat T cells and cells overexpressing ATG5 were cultured for 48 h in the presence and absence of 3-MA. Induction of G2- or M-phase arrest was seen as a consequence of ATG5 overexpression independent of treatment with 3-MA, as normal Jurkat T cells exhibited no G2/M arrest following 3-MA treatment. Representative flow cytometry diagrams are shown (n=3). Moreover, induction of autophagy by Beclin 1 overexpression or starvation failed to produce cell cycle arrest (Supplementary Fig. S4).(c) Morphological analysis. Normal Jurkat T cells and cells overexpressing ATG5 were cultured for 48 h in the presence and absence of 3-MA and analysed. Representative examples of morphology are shown (n=3); large multinucleated cells and cells with abnormal nuclei were seen as a consequence of ATG5 overexpression independent of 3-MA. Neither induction of autophagy by Beclin 1 overexpression nor starvation resulted in such abnormal cells (Supplementary Fig. S4). Scale bar, 10 μm. ((d) Viability assays. Jurkat T cells either overexpressing ATG5 following lentiviral gene transfer or treated with etoposide were cultured in the presence and absence of the indicated pharmacological inhibitors for the indicated times to block autophagy and caspase activity. All values are means±s.d. (n=3).
f7(a) Subcellular fractionation and immunoblotting. Jurkat T cells were cultured in the presence of etoposide for the indicated times. Following etoposide treatment, the ATG5 monomer was newly present in both cytoplasm and nucleus. The exposure of the ATG5 monomer (shown under the dotted line) was longer than that shown above for the ATG5 conjugated to ATG12. Full-length immunoblots are provided in Supplementary Fig. S10.b) A comparison of ATG5 sequences in different species demonstrates the presence of a conserved putative NES, similar to that present in Beclin 1. The sequence alignment was performed with Clustal W using sequence data obtained from GenBank. The characteristic leucines are indicated in red and the resulting sequence of ATG5-ΔNES, following mutation of three leucines within this motif, is shown. (c)(c) Subcellular fractionation and immunoblotting of the nuclear fraction. Jurkat T cells, either treated with etoposide, or overexpressing ATG5 following lentiviral gene transfer, were cultured in the presence and absence of leptomycin B for 72 h. Leptomycin B increased relative ATG5 and Beclin 1 levels in the nucleus.(d) Subcellular fractionation and immunoblotting. Jurkat T cells were transduced to express ATG5-ΔNES, ATG5, or GFP. Although increased levels of ATG5 were observed in both cytoplasm and nucleus, ATG5-ΔNES accumulated following lentiviral gene transfer in the cytoplasm only. Full-length immunoblots are provided in Supplementary Fig. S11.(e) Immunoblotting. ATG5-ΔNES overexpression induced LC3-II formation and p62 degradation, indicating increased autophagic flux.(f) Cell cycle analysis. Jurkat T cells overexpressing ATG5 or ATG5-ΔNES, as well as control cells were cultured for 48 h. Induction of G2 and M phase arrest was seen as a consequence of ATG5, but not ATG5-ΔNES overexpression. As an additional control, we transduced cells with GFP, which, similar to ATG5-ΔNES-overexpressing cells, failed to exhibit G2- and M-phase arrest. Representative flow cytometry diagrams are shown (n=3).(g) Morphological analysis. Non-transduced Jurkat T cells and cells overexpressing ATG5 or ATG5-ΔNES were cultured for 48 h. Large, multinucleated cells were seen as a consequence of ATG5, but not ATG5-ΔNES overexpression. Representative examples are shown (n=3). Scale bar, 10 μm.
Figure 1A-H Effect of CCCP on the localisation of Noc and NocNΔ10. Cellular localisation of Noc‐mYFP (DWA206) and NocNΔ10‐mYFP (DWA382) either with no additions (NA) or after CCCP treatment (5 min; 100 μM), as indicated. Scale bar, 2.5 μm.I-L Effect of Noc overproduction on cell division. Exponentially growing cultures of DWA119 (Δnoc, Pspac(hy)‐noc) and DWA282 (Δnoc, Pspac(hy)‐nocNΔ10) were examined after growth for 1 h with 1 mM IPTG. Cell membranes and DNA were stained with FM5‐95 and DAPI, respectively. Insets show corresponding phase contrast light microscopy images. Scale bar, 5 μm.M Complementation of noc in a Δnoc ΔminCD background. Strains DWA564 (Δnoc, ΔminCD, Pxyl‐noc‐myfp) and 566 (Δnoc, ΔminCD, Pxyl‐nocNΔ10‐myfp) were streaked on nutrient agar (NA) plates in the presence of 0.5% w/v xylose and incubated at 30 and 39°C, as indicated.N Effect of Noc and NocNΔ10 overproduction on sporulation. Strains DWA119 (Δnoc, Pspac(hy)‐noc) and DWA282 (Δnoc, Pspac(hy)‐nocNΔ10) were streaked on NA plates in the absence and presence of 1 mM IPTG, as indicated, and photographed after 48 h at 37°C.O Western blot analysis of cellular fractions (T, total; C, cytosolic; M, membrane) of strains DWA119 and 282 expressing Noc or NocNΔ10, respectively. Proteins were detected using polyclonal antibodies against Noc, DnaA and PBP2B. Antibodies were used at a dilution of 1:10,000.
Figure 2C-L Effects of N‐terminal substitutions on Noc localisation, in strains: DWA211 (F5E), 318 (F9E), 316 (K2E), 212 (R7E), 322 (F5A), 323 (F8A), 325 (F9A), 206 (WT), 328 (S4A) and 329 (S4L), as indicated. Insets show the corresponding phase contrast light microscopy images. Scale bar, 5 μm.
Figure 3B Growth of strains DWA350 (Δnoc ΔminCD) and DWA307 (Δnoc ΔminCD, Pxyl‐HCVAH‐NocNΔ10) on nutrient agar plates at 30 and 48°C in the absence and presence of 0.5% w/v xylose, as indicated.C-F Cell morphology of strains DWA350 and DWA307 following growth in LB at 30°C (C and D) and at 42°C in LB + 0.5% w/v xylose (E and F). Arrowheads indicate minicells. Cell membranes were stained with FM5-95. Insets show the corresponding phase contrast light microscopy images. Scale bar, 5 μm.G, H Cellular localisation of HCVAH‐NocNΔ10‐YFP (G) in strain DWA193 (Δnoc, Pxyl‐HCVAH‐nocNΔ10‐yfp) and overlay showing DAPI‐stained DNA (H). The strain was grown at 30°C in CH medium. Inset shows the corresponding phase contrast light microscopy image. Scale bar, 5 μm.
Figure 4A-F Localisation of ParB‐box mutants. Cellular localisation of (A) Noc‐mYFP (DWA206), (B) NocQ68R‐mYFP (DWA285), (C) NocG86S‐mYFP (DWA286), (D) NocR88A‐mYFP (DWA545), (E) NocR89A‐mYFP (DWA546) and (F) NocR91A‐mYFP (DWA547). Insets show the corresponding phase contrast images. Scale bar, 5 μm.G Ability of ParB‐box mutants to rescue the growth defect of Δnoc ΔminCD. Strains DWA564 (Pxyl‐noc‐myfp), 590 (Pxyl‐nocQ68R‐myfp), 568 (Pxyl‐nocG86S‐myfp), 598 (Pxyl‐nocR88A‐myfp), 600 (Pxyl‐nocR89A‐myfp) and 602 (Pxyl‐nocR91A‐myfp) were streaked on plates containing 0.5% w/v xylose and incubated for 18 h at either 30 or 39°C, as indicated, before being photographed.H-O ParB‐box mutants are dominant‐negative. Cells of strains DWA362 (ΔminCD, Pspac(hy)‐noc), 363 (ΔminCD, Pspac(hy)‐nocNΔ10), 364 (ΔminCD, Pspac(hy)‐nocQ68R) and 365 (ΔminCD, Pspac(hy)‐nocG86S) were examined after growth for 2 h at 42°C with either no additions (NA) (H-K) or in the presence of 1 mM IPTG (L-O), as indicated. Cell membranes were stained with FM5‐95. Insets show the corresponding phase contrast images. Scale bar, 5 μm.
Figure 5A-C Representative images of TetR‐mCherry in cells lacking (A) or containing (B and C) the NBS plasmid pDWA117. Strains DWA427 (A) and 429 (B and C) (both strains contain Pspac‐noc) were examined after growth for 2 h in the absence (A and B) and presence (C) of 1 mM IPTG. DNA was stained with DAPI.D-G Representative images showing the localisation of (D) Noc‐mYFP (DWA519), (E) NocNΔ10‐mYFP (DWA522), (F) NocQ68R‐mYFP (DWA520) and (G) NocG86S‐mYFP (DWA521), in the presence of the NBS plasmid pSG4929.
Figure 6A, B Effects of Noc overproduction on cell division and nucleoid morphology in E. coli. Cells of strain DWA261 carrying pDWA37 (PA1/04/03‐noc) were examined after growth in LB with either no additions (A) or after induction for 1 h with 1 mM IPTG (B).C-E Effects of overproduction of Noc variants on nucleoid morphology. Cells of strains DWA266 (PA1/04/03‐nocNΔ10) (C), 270 (PA1/04/03‐HCVAH‐nocNΔ10) (D) and 267 (PA1/04/03‐nocCΔ50) (E) carrying plasmids for the overproduction of the indicated mutants (see cartoons underneath panels) were grown in LB and examined after growth for 1 h in the presence of 1 mM IPTG. Cell membranes and DNA were stained with FM5‐95 and DAPI, respectively. Scale bar, 5 μm.
Figure 7A, B Effects of Spo0J and Noc30‐Spo0J overproduction on cell division and nucleoid morphology in E. coli. Cells of strains DWA271 (PA1/04/03‐spo0J) (A) and 272 (PA1/04/03‐noc‐spo0J) (B) were grown in LB in the presence of 1 mM IPTG, to induce the expression of either Spo0J (A) or the Noc‐Spo0J hybrid (B), and were examined 1 h post‐induction. Cell membranes and DNA were stained with FM5-95 and DAPI, respectively. Scale bar, 5 μm.
Figure 2(A) Volcano plot shows genes where RNA reads are statistically significant under- or over-expressed in 5 RIRCD affected individuals versus 6 controls resulted from DESeq2 analysis. Decreased genes are represented in red, the up-regulated ones are in green while blue dots highlight most outlying genes (defined by absolute (log2(fold change) + log10(padj))>10).Genes that were not statistically significant are represented in black. Grey and black gene names indicate top 30% of the most dysregulated genes with a highlight on ones involved in metabolism.(D) Relevant functional changes in gene expression showing the major genes that return to baseline or contribute to the recovery in RIRCD patients. The data depicted is between the affected and recovered biopsies of the same patient (F6/1M).(E) Comparative proteome profiling of proteins that are significantly under- or over-expressed in RIRCD affected versus control individuals (p-Anova <0.05-statistically significant - horizontal line). Proteins which are decreased are represented in red while the up-regulated ones are in green while proteins that did not reach statistical significance threshold are marked in black. Vertical lines are delimiting the regulated proteins resulted from the proteomics analysis (the cut-off values were determined based on the 2× standard deviation and the normal distribution from all identified protein's log2 ratio in which the bell curve is symmetric around the mean, therefore, an average log2 ratio of a protein which <−2.2 or > 0.98 was considered as regulated).
Figure 3(A) Western blotting analysis depicts mitochondrial proteins (NDUFA9-Complex I, SDHA-Complex II, MTCO1-Complex IV and MTCO2-Complex IV) levels in control derived muscle (n=3), patient derived muscle during the symptomatic phase (n=3) and patient derived muscle after recovery (n=1). VCL was used as a loading control while the densitometry analysis was done based on the mitochondrial protein TOM20. (B) Densitometry analysis of the immunoblotting from (A) showing an increase in SDHA (Complex II), while NDUFA9 (Complex I) probably as a compensatory mechanism and MT-CO2 (Complex IV) show significant reductions as the majority of mitochondrial encoded proteins belong to this two complexes, thus being destabilized by the defective mitochondrial mistranslation.(C) Mitochondrial DNA copy numbers were determined in affected (n=3) and recovered individuals (n=2) and compared to control individuals (n=4, 3 months, 3 years, 4 years and 7 years) using qPCR showing a significant increase in recovered muscle.(D) Western blotting analysis of proteins involved in the amino-acid sensing and integrated stress response: GCN2, SLC7A11 and ATF4 in control derived muscle (n=3), patient derived muscle during the symptomatic phase (n=3) and patient derived muscle after recovery (n=1). All samples were normalized to VCL which was used as a loading control. (E) Densitometry analysis of proteins from (D) showing a significant increase of major transducers of ISR such as GCN2 and ATF4. Consistent with ISR activation is also the increase in SLC7A1.(F) Transcriptomic pathways related to ATFs and ISR changed in affected patients compared to controls (RIRCD n=5; controls n=6) and in recovered muscle compared to affected muscle (n=1, affected and recovered muscle was collected from the same individual and was analysed using 4 technical replicates) and schematic representation of the metabolic pathways impacted in patient muscle (bottom, right panel).
Figure 5(A) Volcano plot analysis of transcriptomic changes where statistically significant genese are delimited by a horizontal line. Decreased genes are represented in red while the up-regulated ones are in green, while genes that were not statistically significant are represented in black.(B) Analysis of altered mitochondrial gene expression resulted from our RNAseq showing that affected genes and their coding proteins carry a high numbers of glutamic acid and glutamine residues, in accordance to the mitochondrial translational defect.
Figure 1FP titrations show binding of WT α-actinin-1_EF34 to IQ peptides WT (black) and K1647E (red), of α-actinin-1_EF34 mutant E847K/E851K to IQ peptides WT (green) and K1647E (purple), of full-length α-actinin-1 to IQ WT (o), and lack of IQ binding to α-actinin-1_CH1-CH2 (+) and α-actinin-1_EF12 (x; see Table 2 for binding parameters and standard errors). FP titrations showing binding of wild type α-actinin-1_EF34 to IQ peptides WT (black) and I1654A (purple) and of ACTN1_EF34 mutant F833 to IQ WT (red; see Table 2 for binding parameters and standard errors).
Figure 2FP titrations showing binding of apoCaM to IQ peptides WT (black) and K1662E (red) and of apoCaM mutant E88K to IQ WT (green) and IQ peptide K1662E (purple, "charge inversion"; see Table 4 for binding parameters and standard errors). FP titrations showing binding of apo-CaM to IQ peptides WT (black), I1654A (red), and F1658A (green) and of apoCaM mutant F90A to IQ WT (blue; see Table 4 for binding parameters and standard errors).
Figure 3HEK293 cells were transfected with α11.2, α2δ-1, and β2A and cultured for 22-24h before cell attached patch recording in 110 mM Ba2+. Single CaV1.2 channel recordings of CaV1.2 WT and K1647A. Holding potential (HP) was -80 mV and test potential (TP) 0 mV. Shown are 10 consecutive sweeps from representative experiments (see Fig. EV 4 for more sweeps). Dot plots and means + SEM for availability (i.e., likelihood that a sweep had at least one event; c), NPo (d), Po (e), unitary current amplitude i (e), and the mean of the current of a single channel at any point in time calculated from the ensemble averages of each experiment (g) (**p<0.01, ***p<0.001 compared to WT; one-way ANOVA with Bonferroni post-hoc test (c) or Welch ANOVA with Tamhane T2 test (d-g); n = 7 to 35 see Table 5 for more details).
Figure 4HEK293 cells were transfected with α11.2, α2δ-1, and β2A plus, if indicated, α-actinin-1 before cell attached patch recording. Representative single CaV1.2 channel recordings of WT CaV1.2 alone or with WT or E847K/E851K mutant α-actinin-1. Mean assemble averages for all experiments for each combination. Dot plots and means + SEM for availability (c), NPo (d), Po (e), unitary current amplitude i (f), and the mean of the current of a single channel calculated from the ensemble averages of each experiment (g) (*p<0.05, **p<0.01, ****p<0.001; unpaired t-test; n = 13 to 35; see Table 6 for more details).