EMBO/SourceData huggingface dataset:
figf2b) Reciprocal coimmunoprecipitation (IP) followed by immunoblotting revealed that GluN2Bct specifically interacted with cDAPK1 but not wtDAPK1. Flag-tagged inactive wtDAPK1 or constitutively active cDAPK1 was expressed with either HA-GluN2Bct-CTM or HA-GluN2Bct-CTMm at various ratios in HEK cells, and coimmunoprecipitation and/or immunoblotting were performed 24 h thereafter. Anti-HA was used to detect HA-GluN2Bct-CTM and HA-GluN2Bct-CTMm, anti-FLAG to detect wtDAPK1 and cDAPK1.(c) HA-GluN2Bct-CTM specifically and dose-dependently decreased the level of cDAPK1 (n = 4 independent experiments from 4 separate cell cultures and transfections; P 0.001; F(5,18) = 18.27) but not wtDAPK1(d; n = 3 independent experiments from 3 separate cell cultures and transfections; P = 0.933; F(5,12) = 0.249). HA-GluN2Bct-CTM-mediated cDAPK1 knockdown was significantly reduced by NH4Cl (c; 20 mM; n = 4; ΔΔΔP 0.001 compared to HA-GluN2Bct-CTM:cDAPK1 8:1 group) and by mutational inactivation of CTM(e; HA-GluN2Bct-CTMm; P = 0.785 compared to control (white bar); F(4,35) = 0.432, 8 independent experiments from 8 separate cell cultures and transfections). Levels of cDAPK1 or wtDAPK1 cotransfected with pcDNA3.0 vector (0:1, white bar) represent the control values, arbitrarily set as 1. *P 0.05, **P 0.01, ***P 0.001, compared with the control; n.s., not significant. Bars represent relative means ± s.e.m. Full-length blots are presented in Supplementary Figure 9. Membranes reprobed for β-actin were used as loading controls. One-way ANOVA with Fisher least significant difference test.
figf3(a) Left, NMDA (50 μM; 30 min) activated DAPK1, resulting in a time-dependent decrease in its phosphorylation levels (pDAPK1, n = 4). Right, coimmunoprecipitation (IP) with anti-GluN2B and sequential immunoblotting for DAPK1 and GluN2B showed an NMDA-induced association between DAPK1 and GluN2B (n = 3).(b) Design and production of TAT-GluN2Bct-CTM and TAT-GluN2Bct peptides (left) using an E. coli expression system. Coomassie blue staining after SDS-PAGE assessed their purity (right); left lane, size marker.(c) Bath application of TAT-GluN2Bct-CTM (200 μM; n = 9), but not TAT-GluN2Bct (200 μM; n = 6), knocked down activated DAPK1, and this was prevented by NH4Cl (20 mM; n = 5; one-way ANOVA; P 0.001, F(5,36) = 10.891) and dose- (d, doses in μM; n = 4; P 0.001; F(6,21) = 18.14) and time-dependent (e; P 0.001; F(8,44) = 12.074). (f) A single pretreatment of TAT-GluN2Bct-CTM (sing; 200 μM, 60 min before and during the 30-min NMDA stimulation) produced a transient reduction of DAPK1, returning to baseline within 7 h (n = 4; P = 0.888), and an additional dose of the peptide after NMDA washout resulted in a persistent decrease in DAPK1 up to 7 h (mult; n = 4; ΔΔP = 0.002). One-way ANOVA; P 0.001, F(4,15) = 10.389.(g) Synthetic peptides TAT-GluN2B and TAT-GluN2BCTM.(h) TAT-GluN2BCTM (25 μM; n = 5; P = 0.001), but not control TAT-GluN2B (25 μM; n = 4; P = 0.223), decreased native DAPK1, and this was prevented by NH4Cl (20 mM; n = 5; P = 0.302). One-way ANOVA, P 0.001, F(5,24) = 13.591. Relative levels of DAPK1 were normalized to those in the saline control group and compared to the saline control (white bar; *P 0.05, **P 0.01 and ***P 0.001) or NMDA-treated group (gray bar; ΔP 0.05, ΔΔP 0.01 and ΔΔΔP 0.001). Membranes reprobed for β-actin were used as a loading control. Bars represent relative means ± s.e.m. Sample sizes represent number of individual experiments. Full-length blots are presented in Supplementary Figure 9.
figf4(a) Top, the synthetic cell-penetrating α-synuclein targeting peptide TAT-βsynCTM and its control TAT-βsyn. Middle, immunoblots demonstrate that TAT-βsynCTM (25 μM; n = 5), but not the CTM-lacking control peptide TAT-βsyn (25 μM; n = 5), specifically decreased the targeted endogenous α-synuclein (one-way ANOVA, Tukey post hoc, P 0.001, F(3,16) = 12.435), without affecting the level of unrelated control protein PSD-95 at 4 h (bottom), and this reduction was prevented in the presence of NH4Cl (20 mM; n = 5). Sample sizes represent individual experiments from at least 3 separate primary cultures. ((b) Top, PSD-95 targeting peptide TAT-GluN2B9cCTM and control TAT-GluN2B9c. Middle, TAT-GluN2B9cCTM (25 μM; n = 4), but not Tat-GluN2B9c (25 μM; n = 4), effectively degraded endogenous PSD-95 (one-way ANOVA, Tukey post hoc, P 0.001, F(3,12) = 18.154) without perturbing untargeted protein α-synuclein (bottom). NH4Cl rescued PSD-95 degradation. Sample sizes represent individual experiments from at least 2 separate primary cultures. Membrane reprobing for β-actin was used as an additional specificity and loading control. ΔP 0.05, **,ΔΔP 0.01 and ***P 0.001; bars represent relative mean values ± s.e.m. normalized to the saline control (arbitrarily set as 1). Full-length blots are presented in Supplementary Figure 9.
figf5(a) Immunoblotting for phosphorylated DAPK1 (pDAPK1) revealed a time-dependent activation (dephosphorylation) of DAPK1 by H2O2 treatment (300 μM; 30 min; n = 4).(b) Bath application of 100 μM TAT-GluN2Bct-CTM (36.54 ± 7.1% of control; n = 8; P = 0.001), but not TAT-GluN2Bct (89.13 ± 10.78%; n = 7; P = 0.311), 60 min before and during H2O2 treatment (300 μM; 30 min) knocked down DAPK1 at 2 h after washout, and this effect was rescued by NH4Cl (20 mM; n = 8; **P = 0.003 to control; P = 0.106 to H2O2-treated). One-way ANOVA, F(4,34) = 11.628, P 0.001. Bars represent DAPK1 levels relative to saline control group. β-actin was used as a loading control.(c) LDH assay revealed that H2O2 treatment (300 μM; 30 min) resulted in a significant increase in neuronal death 12 h after treatment (n = 8; 2.50 ± 0.12; P 0.001 to control), which was rescued by breaking down H2O2 with catalase (100 U in 10 μl phosphate-buffered saline; n = 4; 1.17 ± 0.02; P = 0.001 to H2O2 group). H2O2-induced neurotoxicity was significantly reduced by TAT-GluN2Bct-CTM (50 μM; applied 60 min before and maintained throughout the experiments; n = 9; 1.56 ± 0.08; P = 0.001 to H2O2 group), but not by TAT-GluN2Bct (50 μM; n = 9; 2.63 ± 0.10; P = 0.105 to H2O2 group) or the NMDAR antagonist APV (1 μM; n = 4; 2.16 ± 0.14; P = 0.169 to H2O2 group). NH4Cl abolished the neuroprotective effect of TAT-GluN2Bct-CTM (n = 4; 2.39 ± 0.27; P = 0.538 compared to H2O2 group). One-way ANOVA, P 0.001, F(6,41) = 26.842. ***,ΔΔΔP 0.001; bars represent relative mean values ± s.e.m. normalized to the saline control (white bar, arbitrarily set as 1). n represents individual experiments from at least 3 separate primary cultures. Full-length blots are presented in Supplementary Figure 9.
figf6(b) 2,3,5-Triphenyltetrazolium chloride staining of a series of transverse brain sections showed reliable damage in the ipsilateral side following unilateral MCAo. (c) Black dashed lines on a section stained as in b represent brain areas removed for immunoblotting.(d) Immunoblots demonstrated specific DAPK1 knockdown in the infarct (Ipsi) but not contralateral (Contra) side following application of TAT-GluN2BCTM (10 mg per kilogram, i.v.; n = 3; t(4) = 14.459, P 0.001) but not TAT-GluN2B (10 mg per kilogram, i.v.; n = 3; t(4) = 0.739, P = 0.501). β-actin was used as a loading control; two-tailed Student's t-test ***P 0.001; n.s., not significant.(e) HE (left) and immunohistochemical DAPK1 (right) staining of adjacent brain sections. Compared with those in saline (top) and TAT-GluN2B-treated (middle) controls, TAT-GluN2BCTM treatment (bottom) selectively reduced infarct area (left) and DAPK1 levels (right) ipsilaterally. Black outlining delineates infarct areas as visualized with HE staining.(f) Left, brain sections stained with Fluorojade B in rats injected with saline (n = 6), TAT-GluN2B (n = 5) or TAT-GluN2BCTM (n = 5) after treatment as shown in a. Right, quantification of cellular damage by counting the number of Fluorojade B-positive cells in each 640 × 640 pixel image at 10× magnification. TAT-GluN2BCTM (10 mg per kilogram) displayed more prominent neuroprotection in the cortex (P 0.001) and striatum (P 0.001) as compared to TAT-GluN2B (10 mg per kilogram). Cortex: H(2) = 41.235; P 0.001; striatum: H(2) = 38.808; P 0.001. Kruskal-Wallis ANOVA on ranks with Dunn's post hoc; bars represent relative means ± s.e.m., ***,ΔΔΔP 0.001. n values represent tissue from 3 animals collected from at least 2 litters. Scale bars 1 mm in b,c,e, 20 μm in f. Full-length blots are presented in Supplementary Figure 9.
Figure 1(L) Larval NSCs of control (ctrl; yw), pr-set7716/Df, and UAS-pr-set7 induced with insc­-Gal4 at 72h ALH were stained for Pr-set7, Mira and DNA. (M, N) Quantifications of NSC diameters (M) at 24h ALH and EdU incorporation (N) for genotypes in (O). In (M), n=152 for control; n=129 for pr-set7716/Df. In (N), for control, n=601, 13 BL at 24h ALH; n=988, 14 BL at 48h ALH; n=813, 9 BL at 72h ALH and n=829, 10 BL at 96h ALH. For pr-set7716/Df, n=566, 12 BL at 24h ALH; n=808, 13 BL at 48h ALH; n=1032, 10 BL at 72h ALH and n=825, 9 BL at 96h ALH. Data information: Quantification data are presented in as mean ± SD M, N). n numbers in N) were total NSCs counted with total brain lobes measured, while each brain lobe considered as one biological replicate. White arrows point to NSCs Statistical analyses were done comparing two different genotypes using Mann-Whitney test M, N). ***P < 0.001. Scale bars, 5 μm L),
Figure 2(C) Larval NSCs of control (ctrl; yw), pr-set7716/Df, pr-set7716/Df with UAS-pr-set7 induced with insc-Gal4, and pr-set7716/Df with pr-set7-BAC at 24h ALH were stained for H4K20me1, Dpn, Mira and DAPI. Control: n=108; pr-set7716/Df: n=87; pr-set7716/Df with UAS-pr-set7 induced with insc-Gal4: n=167 and pr-set7716/Df with pr-set7-BAC: n=104. Data information: White arrows point to NSCs. Scale bars, 5 μm(E) Larval NSCs with FUCCI constructs induced with insc-Gal4 at 24h were stained for GFP, RFP, Dpn, and Prospero (Pros). (F) Quantifications of quiescent NSCs in different cell-cycle stages from FUCCI flies (induced with insc-Gal4) in control (and insc-Gal4>FUCCI) and pr-set7716/Df. Quiescent NSCs of insc-Gal4>FUCCI: 76.1%±1.5% in G2, 1.7%±0.2% in S and 22.2%±1.3% in G0 (n=343). Quiescent NSCs of insc-Gal4>FUCCI; pr-set7716/Df: 74.4%±1.0% in G2, 0.9%±0.2% in S and 24.7%±0.8% in G0 (n=344). Data information: Quantification data are presented in as mean ± SD Statistical analyses were done comparing two different genotypes using Mann-Whitney test ns: non-significant. White arrows point to NSCs. Scale bars, 5 μm
Figure 3(D) qPCR analysis of pr-set7, cdk1, ebd1 and arm in larval brains of control (ctrl; yw) and pr-set7716/Df(3R)ED5644 (716/Df) at 24h ALH. n=7 as biological replicates. Statistical analyses were done comparing between control (GAPDH1, GAPDH2, Tbp1 and Rpl32) and pr-set7716/Df, using Mann-Whitney test. The mRNA levels of control were normalized to 1. Data are presented as mean ± SD calculated from all replicates. Data information: Data are presented in (D, as mean ± SD. Statistical analyses were done comparing two different genotypes using Mann-Whitney test (D *P < 0.05G) Larval NSCs of control (ctrl; yw) and pr-set7716/Df at 24h ALH were stained for Ebd1, Dpn and Mira. Yellow dotted boxes, zoomed-in area. White arrows point to NSCs. Data information: Scale bars, 15 μm (G).(H, I) Quantifications of nuclear Ebd1 (H) and the corrected total cell fluorescence (CCF) (I) In (H), n=756, 9 BL for control; n=765, 9 BL for pr-set7716/Df. In (I), CCF = Integrated Density - (Area of selected cell × Mean fluorescence of background readings). CCFs were 1102.2±493.2 (n=99) for control (ctrl; yw) and 144.0±88.0 (n=98) for 716/Df. Data information: Data are presented in , I, s mean ± SD. n numbers in (H) were total NSCs counted with total brain lobes measured, while each brain lobe was considered as one biological replicate. Statistical analyses were done comparing two different genotypes using Mann-Whitney test , H, I, ***P < 0.001.
Figure 4(H) Larval brains of control (ctrl; yw), cdk1-Myc overexpression under insc­-Gal4, pr-set7716/Df(3R)ED5644 (716/Df), and pr-set7716/Df with cdk1-Myc induced with insc-Gal4 at 24h ALH were labelled with Dpn and EdU. (I, J) Quantifications of EdU incorporation (I) and NSC diameters (J) for genotypes in (H). In (I), n=1334, 16 BL for control; n=1299, 15 BL for insc>cdk1; n=1221, 18 BL for pr-set7716/Df and n=1372, 16 BL for pr-set7716/Df with cdk1-Mycinduced with insc-Gal4. In (J), n=153 for control; n=152 for insc>cdk1; n=156 for pr-set7716/Df and n=159 for pr-set7716/Df with cdk1-Myc induced with insc-Gal4.Data information: Data were presented in quantification graphs as mean ± SD I, J). n numbers in I) were total NSCs counted with total brain lobes measured, while each brain lobe was considered as one biological replicate. Statistical analyses were done comparing among different genotypes using ordinary one-way ANOVA ***P < 0.001. Scale bars, 30 μm H). Control: insc­-Gal4/+ UAS-dicer2
Figure 5(A) Larval NSCs of control (ctrl; yw) and ebd1240 at 24h ALH were stained for Deadpan (Dpn) and Miranda (Mira). (B) Quantifications of cellular extensions for genotypes in (A). Control: n=886, 11 BL; ebd1240: n=864, 12 BL. (C) Larval brains of control (ctrl; yw) and ebd1240 at 24h ALH were labelled with Dpn and EdU. (D) Quantifications of NSC without EdU incorporation for genotypes in (C). Control: n=1034, 12 BL; ebd1240: n=1139, 16 BL. Data information: Data are presented in (B, D as mean ± SD. n numbers in (B, D, were total NSCs counted with total brain lobes measured, while each brain lobe was considered as one biological replicate. Statistical analyses were done comparing two different genotypes using Mann-Whitney test (B, D ns: non-significant; *P < 0.05; ***P < 0.001.(H) Larval brains of control (ctrl; yw), ebd1-Flag overexpression under insc­-Gal4, pr-set7716/Df(3R)ED5644 (716/Df) and pr-set7716/Df with ebd1 induced with insc-Gal4 at 24h ALH were labelled with Dpn and EdU. (I) Quantifications of NSCs without EdU incorporation for larval brains in (H). Control: n=1162, 13 BL; insc>ebd1: n=997, 11 BL; pr-set7716/Df: n=928, 13 BL and pr-set7716/Df with ebd1 induced with insc-Gal4: n=1284, 16 BL. Data information: Data are presented in I) as mean ± SD. n numbers in I) were total NSCs counted with total brain lobes measured, while each brain lobe was considered as one biological replicate. Statistical analyses were done comparing among different genotypes using ordinary one-way ANOVA I). ns: non-significant; *P < 0.05; ***P < 0.001.
Figure 6(A) Larval NSCs of control (ctrl; yw) and cdk1B47 at 24h ALH were labelled for Earthbound1 (Ebd1), Deadpan (Dpn), and Miranda (Mira). (B) Quantifications of the corrected total cell fluorescence (CCF) of Ebd1 in genotypes in (A). CCF = Integrated Density - (Area of selected cell × Mean fluorescence of background readings). CCFs were 846.9±394.2 for control (ctrl; yw; n=167, 14 BL) and 354.3±245.3 for cdk1B47 (n=211, 13 BL). (C, D) Larval NSCs of control (UAS-dicer2) and UAS-cdk1-Myc induced with insc-Gal4 at 6h ALH were labelled for Ebd1, Dpn, and Mira. (D) Quantifications of the CCF of Ebd1 in genotypes in (C). CCFs were 111.3±80.2 for control (n=157, 12 BL) and 346.6±221.1 for cdk1-Myc (n=181, 12 BL). Data information: Data are presented in (B, D, as mean ± SD. n numbers in (B, D, were total NSCs counted with total brain lobes measured, while each NSC was considered as one biological replicate. White arrows point to NSCs (A, C, Yellow dotted boxes indicate the region of zoomed-in images (A, C, Statistical analyses were done comparing between two different genotypes using Mann-Whitney test (B, D) Scale bars, 15 μm (A, C,(E) qPCR analysis of cdk1 in larval brains of control (ctrl; yw) and ebd1240 at 24h ALH. n=3 as biological replicates. Statistical analyses were done comparing control (GAPDH1, GAPDH2, Tbp1 and Rpl32) and ebd1240, using two-tailed Student's t-test. The mRNA levels of control were normalized to 1. Data information: Statistical analyses were done comparing between two different genotypes using two-tailed Student's t-test (E).Larval NSCs of control (ctrl; yw), ebd1240 and pr-set7716/Df(3R)ED5644 (716/Df) at 24h ALH were stained for Senseless (Sens), Dpn and Mira. (F) Data information: White arrows point to NSCs F). Yellow dotted boxes indicate the region of zoomed-in images F). Scale bars, 15 μm F).
Figure 1(B) Representative IF images in CHME3 stably expressing Flag alone control or the Flag-tagged EB1 constructs depicted in A co-stained for Tyrosinated-MTs (Tyr-MTs), and the nucleus (Hoechst). Scale bar, 10 μm.(C) HIV-1-VSV-luc infection is enhanced in CHME3 depleted of endogenous EB1 and stably expressing full-length (FL) EB1, but not in control Flag or any of the other EB1 constructs depicted in A.(D) Increasing amount of FL-EB1, but not ∆EEY results in a dose-dependent enhancement of HIV-1-VSV-luc infection in transiently transfected CHME3 cells.HIV-1-VSV-luc (E) infection is reduced in differentiated THP-1 depleted of CLIP170 determined by luciferase assays or FACS analysis, respectively.HIV-1-VSV-ZsGreen at various dilutions (corresponding to multiplicities of infection (m.o.i) 0.06, 0.03 and 0.02) (F) infection is reduced in differentiated THP-1 depleted of CLIP170 determined by luciferase assays or FACS analysis, respectively.(G) HIV-1-WT-luc infection is decreased in CLIP170 depleted CHME3 cells.
Figure 2Effects of CLIP170 on fusion of viral particles by endocytosis. CHME3 cells either treated with control or CLIP170 siRNAs (A) were infected with Mock or HIV-1-VSV-BlaM-Vpr. Representative FACS analysis of cells (n = 3) showing ∼ 9% (Control siRNA) and 3% (CLIP170 siRNA) shift (A) from green (uncleaved CCF2) to blue (cleaved CCF2). % infected cells is indicated at the top left corner of each plot and quantification from independent repeats is presented as bar graphs at the right side of each FACS plot.HIV-1-VSV-luc infection is enhanced in Flag-CLIP170, but not in Flag control, expressing CHME3 cells.Molecular weight markers (in kDa) are shown to the right of WBs in C.Effects of CLIP170 on fusion of viral particles by endocytosis. CHME3 cells expressing Flag control or Flag-CLIP170 (D) were infected with Mock or HIV-1-VSV-BlaM-Vpr. Representative FACS analysis of cells (n = 3) showing no difference (D) from green (uncleaved CCF2) to blue (cleaved CCF2). % infected cells is indicated at the top left corner of each plot and quantification from independent repeats is presented as bar graphs at the right side of each FACS plot.(E) The percentage fused double-labelled (GFP-Vpr+/S15-tomato-) HIV-1-DL-WT are not affected in CHME3 cells depleted of CLIP170. Data represent mean of ≥895 virus particles analyzed in ≥11 fields of view (≥17 cells) for each condition. One-way ANOVA was used to calculate statistical significance (mean ±SEM).(F) Percentage HIV-1-WT-GFP-Vpr particles within 2 μm of the nucleus is reduced in CHME3 depleted of CLIP170 at 2 and 4 h.p.i, scatterplot with mean of ≥354 virus particles quantified in ≥13 cells per sample. Statistical significance was determined by one-way ANOVA * = p<0.05, *** = p<0.001.Infected cells in F analyzed by live cell imaging. Scatterplots representing displacement over time (velocity) Each dot represents one viral particle tracked, red line indicates the mean. 188 trajectories were analyzed from 25 movies. Statistical significance was determined by t test. *** = p<0.001.Infected cells in F analyzed by live cell imaging. cumulative distance travelled over time (speed) (H). Each dot represents one viral particle tracked, red line indicates the mean. 188 trajectories were analyzed from 25 movies. Statistical significance was determined by t test. *** = p<0.001.(I) The induction of Ac-MTs is blocked in HIV-1-VSV-luc (Virus) infected, but not in uninfected (NI) or Mock infected CHME3 depleted of EB1, but not CLIP170 at 6 h.p.i. Tyrosinated MTs (Tyr-MTs) are not affected. Representative fields are shown. Similar results were obtained in three independent experiments. Scale bar, 50 μm.
Figure 3CHME3 treated with negative control, EB1 or CLIP170 siRNAs were either lysed and analyzed by WB Molecular weight markers (in kDa) are shown to the right of WBs in A.CHME3 treated with negative control, EB1 or CLIP170 siRNAs were infected with GFP-Vpr/S15-tomato-labeled VSV-G pseudotyped HIV-1 (B). Scatterplot of maximum p24 intensity of fused viral particles normalized to the control mean.(C-D) Amounts of pelleted p24 CA normalized to the input CA at 3 h.p.i. with HIV-1-VSV-luc in 293A (C) or CHME3 (D) treated with control, EB1 or CLIP170 siRNAs. Mean +/- SEM from three independent experiments is shown. Statistical significance was determined by one-way ANOVA. Error bars = standard error of the mean (* = p-value ≤0.05, ** = p-value ≤0.01, *** = p-value ≤0.001).
Figure 4Representative (n=3) WB analysis demonstrating that while GAPDH-HA control do not bind (A FEZ1-Flag control pelleted with in vitro assembled HIV-1 CA-NC complexes.Representative (n=3) WB analysis demonstrating that while EB1-Flag do not bind pelleted with in vitro assembled HIV-1 CA-NC complexes.Representative (n=3) WB analysis demonstrating that while Flag-CLIP170 pelleted with in vitro assembled HIV-1 CA-NC complexes.(D) Quantification of the levels of bound CLIP170 as a ratio of total protein across experimental replicates (n=3) from C. Statistical significance was determined by t test (mean ±SEM) *** = p<0.001.(E) Representative WB analysis (n=3) showing the levels of HIV-1 p24 CA in mock and virus fractions separated by sucrose gradient centrifugation. Fractions 1-3 contain free p24 not associated with the intact cores, while fractions #8 and # 9 harbouring intact HIV-1 cores.(F) Flag-CLIP170, but not Flag control, also binds to fractions containing intact HIV-1 cores (Virus #8 and #9) but not with Mock fractions.(G) HIV-1-WT-luc infection is increased in CHME3 cells stably expressing Flag-CLIP170, but not control Flag or Flag-CLIP170ΔCAPgly. Molecular weight markers (in kDa) are shown to the right of WBs.(H) Representative images (n=3) of CHME3 expressing Flag-CLIP170 or Flag-CLIP170ΔCAPgly stained for Flag and Tyr-MTs. Scale bar, 10 μm.
Figure 5(A) Super resolution microscopy (SIM) imaging of Flag-tagged proteins, cyclophilin A (CypA-Flag), EB1-Flag, or Flag-CLIP170 bound to in vitro assembled CA-NC complexes, stained with anti-p24 AG3.0 (Red), anti-Flag or anti-CLIP170 (Green). Scale bar, 2 μm. Representative images from different fields of view are shown.(B) WB analysis confirming protein expression in samples from A and C. Molecular weight markers (in kDa) are shown to the right of WBs.(C) Quantification (n=3) of the association of each protein with 97 to 137 CA-NC complexes, using untransfected lysates (Control) and EB1-Flag as controls for non-specific background staining.(D) Lysates from untransfected, CypA-Flag- or Flag-CLIP170-transfected cells were subjected to CA-NC binding assays and WB analysis.(E) Levels of CypA or CLIP170 bound to WT or R18L CA-NC assemblies in samples from D were quantified using Fiji (n = 4 experimental replicates; data is presented as a ratio of CypA or CLIP170 in bound versus input for each CA-NC assembly, normalized to WT CA-NC arbitrarily set to 1). Statistical significance was determined by t test (mean ±SEM). *** = p<0.001.