Journal: bioRxiv
Article Title: Copper is an essential regulator of the autophagic kinases ULK1/2 to drive lung adenocarcinoma
doi: 10.1101/816587
Figure Lengend Snippet: a , The amino-acid sequence of human MEK1 aligned to human ULK1 and human ULK2. Black letters, amino acids; blue letters, the four amino acids mutated in C u- b inding m utant (CBM) of MEK1 to decrease Cu binding and those conserved between ULK1 and ULK2. b , c , Immunoblot detection of recombinant GST-ULK1 or GST-ULK2 bound to a resin charged with or without Cu, Fe, or Zn compared to input. d , e , f , g , Immunoblot detection of recombinant phosphorylated (P)-ATG13, total (T)-ATG13, and GST-ULK1 or GST-ULK2 from ULK1 or ULK2 in vitro kinase assays treated with or without increasing concentrations of CuCl 2 from 0 to 10 μM ( d , e ), with or without increasing concentrations of TTM from 0 to 50 μM, or 10 μM MRT68921 ( f , g ). Quantification: ΔP-ATG13/T-ATG13 normalized to GST-ULK1 and GST-ATG13 alone. h , Immunoblot detection of P- and/or T-mTOR, p70S6K, ULK1, ATG13, CCS, or β-ACTIN from Ctr1 -/- MEFs stably expressing CTR1 WT (WT) or empty vector (VO) treated with vehicle (VEH) or amino acid deprivation (-AA). Quantification: ΔP-ATG13/T-ATG13 normalized to WT, VEH control. i , j , Immunoblot detection of recombinant P-ATG13, T-ATG13, or immunoprecipitated (IP)-ULK1 from immunocomplex ULK1 kinase assays from Ctr1 -/- MEFs stably expressing WT or VO treated with VEH or -AA or MEFs stably expressing sgRNA against Rosa (-) or Atp7a ( #1 or #2 ). Quantification: ΔP-ATG13/T-ATG13 normalized to WT, VEH control or Rosa ( - ) control. k , Immunoblot detection of LC3-I, LC3-II, or β-ACTIN from Ctr1 -/- MEFs stably expressing WT or VO treated with VEH, -AA, or rapamycin (RAP), with or without bafilomycin (BAF). Quantification: ΔLC3-II/β-ACTIN normalized to WT, VEH control. l , Scatter dot plot of flow cytometry analysis of autophagic flux quantified by the ratio of mean mCherry-LC3 fluorescent intensity (FI)/mean EGFP-LC3 FI ± s.e.m. from Ctr1 -/- MEFs stably expressing WT (black circles) or VO (red squares) and mCherry-EGFP-LC3B treated with VEH, -AA, or RAP, with or without BAF normalized to WT, VEH control. Results were compared using a two-way ANOVA followed by a Sidak’s multi-comparisons test. One asterisk, P<0.05; Four asterisks, P<0.0001. n≥7. m , Representative fluorescence images of EGFP, mCherry, or the merge from Ctr1 -/- MEFs stably expressing WT or VO and mCherry-EGFP-LC3B treated with VEH, BAF, - AA, or RAP. n , Scatter dot plot of quantified mCherry positive ( + )-LC3 puncta per cell or mCherry + EGFP + -LC3 puncta per cell ± s.e.m. from Ctr1 -/- MEFs stably expressing WT (black circles) or VO (red squares) and mCherry-EGFP-LC3B treated with VEH, BAF, -AA, or RAP. Results were compared using a two-way ANOVA followed by a Sidak’s multi-comparisons test. Three asterisks, P<0.001; two asterisks, P<0.0001. n≥24. o , Immunoblot detection of LC3-I, LC3-II, P-ERK1/2, T-ERK1/2, or β-ACTIN from MEFs stably expressing sgRNA against Rosa (-) or Atp7a ( #1 or #2 ) treated with VEH or BAF. Quantification: ΔLC3-II/T-β-ACTIN and ΔP-ERK1/2/T-ERK1/2 normalized to Rosa ( - ), VEH control. p , Scatter dot plot of flow cytometry analysis of autophagic flux quantified by the ratio of mean mCherry-LC3 FI/mean EGFP-LC3 FI ± s.e.m. from MEFs stably expressing sgRNA against Rosa (-, black circles) or Atp7a ( #1 or #2 , blue squares, blue triangles) and mCherry-EGFP-LC3B treated with VEH or BAF normalized to Rosa ( - ), VEH control. Results were compared using a two-way ANOVA followed by a Sidak’s multi-comparisons test. Four asterisks, P<0.0001. n=9. q , Representative fluorescence images of EGFP, mCherry, or the merge from MEFs stably expressing sgRNA against Rosa (-) or Atp7a ( #1 or #2 ) and mCherry-EGFP-LC3B treated with VEH or BAF. r , Scatter dot plot of quantified mCherry + -LC3 puncta per cell or mCherry + EGFP + -LC3 puncta per cell ± s.e.m. from MEFs stably expressing sgRNA against Rosa (-, black circles) or Atp7a ( #1 or #2 , blue squares, blue triangles) and mCherry-EGFP-LC3B treated with VEH or BAF. Results were compared using a two-way ANOVA followed by a Sidak’s multi-comparisons test. Two asterisks, P<0.01; Four asterisks, P<0.0001. n≥26. Western blots images are representative of at least three biological replicates.
Article Snippet: pWZLblasti-CTR1 WT (Addgene plasmid #53157) , pBABEpuro-mCherry-EGFP-LC3B (Addgene plasmid #22418) , pBABEpuro-EGFP-LC3B (Addgene plasmid #22405) , pLenti-CRISPRV2blasti (Addgene plasmid #83480), pLenti-CRISPRV2puro (Addgene plasmid #52961) , pWZLblasti-MEK1 WT (Addgene plasmid #53161) , pWZL-MEK1 CBM (CBM:M187A/H188A/M230A/H239A) , pBABEpuro-HA-ERK2 GOF (GOF: R67S/D321N; Addgene plasmid #53203) , pMXs-IP-EGFP-ATG13 (Addgene plasmid #38191) , pMXs-IP-EGFP-FIP200 (Addgene plasmid #38192) , pMXspuro-EGFP-DFCP1 (Addgene plasmid #38269) , pMXs-IP-EGFP-WIPI1 (Addgene plasmid #38272) , and pLentiCRISPRv2Cre (Addgene plasmid #82415) were previously described.
Techniques: Sequencing, Binding Assay, Western Blot, Recombinant, In Vitro, Stable Transfection, Expressing, Plasmid Preparation, Immunoprecipitation, Flow Cytometry, Fluorescence