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Mib1 E3 Ligase Interacts with and Destabilizes GABARAP and Promotes GABARAP Ubiquitination at Lys13 and Lys23 (A) HEK293A cells expressing FLAG-Mib1 or control vector for 48 hr were analyzed by immunoblot. (B) Quantification of (A). Statistical analysis using unpaired Student’s t test; mean ± SEM; n = 3; ∗ p ≤ 0.001. (C) Anti-GABARAP immunoprecipitate from HEK293A cells analyzed by immunoblotting. Ab, anti-GABARAP antibody. Lys, HEK293A lysate. (D) HEK293A cells expressing FLAG-tagged constructs were incubated with recombinant GST or GST-GABARAP beads and immunoblotted. (E) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were stringently washed in denaturing buffer. CS, C985S; GAB, GABARAP; Ponc, Ponceau S. Short and long exposures are shown. ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-GABARAP, respectively. (F) Immunoprecipitation of U2OS cells expressing the indicated constructs lysed in boiling SDS buffer and immunoblot. Free ubiquitin and ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-LC3B/GABARAP are indicated, respectively. (G) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were washed as in (E). (H) See (G). Low and high exposures are shown. (I) Immunoprecipitation of HEK293A cells expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in <t>TNTE</t> buffer (20 mM <t>Tris,</t> pH 7.4, 150 mM NaCl, 0.5% w/v Triton X-100, 5 mM EDTA) + N-ethylmaleimide. Diubiquitinated GABARAP is indicated with ∗∗ . Immunoglobulin light chain is indicated with an arrow. (J) Immunoprecipitation of HEK293A cells treated with RF or GABARAP siRNA for 72 hr and expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer + N-ethylmaleimide. Di- and tri-ubiquitinated GABARAP is indicated with ∗∗ and ∗∗∗ , respectively. Immunoglobulin light chain is indicated with an arrow. (K) Two GABARAP ubiquitination sites, lysine 13 (K13) and lysine 23 (K23), were identified by mass spectrometry on three different peptides. (Top) Comparison of peak areas for the FVYKEEHPFEK(diGly)R peptide containing K13 ubiquitination site (n = 3 measurements) is shown. (Middle and bottom) The K23 ubiquitination site was detected as two different peptides as a result of missed cleavage. Quantification of peptides K(diGly)KYPDRVPVIVEK (middle) and K(diGly)KYPDR (bottom) showed significantly lower abundance in C985S mutant compared to the WT. (L) Conservation of GABARAP K13 and K23 ( ∗ ) between ATG8 orthologs. See also Figure S5 .
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1) Product Images from "Centriolar Satellites Control GABARAP Ubiquitination and GABARAP-Mediated Autophagy"

Article Title: Centriolar Satellites Control GABARAP Ubiquitination and GABARAP-Mediated Autophagy

Journal: Current Biology

doi: 10.1016/j.cub.2017.06.021

Mib1 E3 Ligase Interacts with and Destabilizes GABARAP and Promotes GABARAP Ubiquitination at Lys13 and Lys23 (A) HEK293A cells expressing FLAG-Mib1 or control vector for 48 hr were analyzed by immunoblot. (B) Quantification of (A). Statistical analysis using unpaired Student’s t test; mean ± SEM; n = 3; ∗ p ≤ 0.001. (C) Anti-GABARAP immunoprecipitate from HEK293A cells analyzed by immunoblotting. Ab, anti-GABARAP antibody. Lys, HEK293A lysate. (D) HEK293A cells expressing FLAG-tagged constructs were incubated with recombinant GST or GST-GABARAP beads and immunoblotted. (E) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were stringently washed in denaturing buffer. CS, C985S; GAB, GABARAP; Ponc, Ponceau S. Short and long exposures are shown. ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-GABARAP, respectively. (F) Immunoprecipitation of U2OS cells expressing the indicated constructs lysed in boiling SDS buffer and immunoblot. Free ubiquitin and ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-LC3B/GABARAP are indicated, respectively. (G) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were washed as in (E). (H) See (G). Low and high exposures are shown. (I) Immunoprecipitation of HEK293A cells expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer (20 mM Tris, pH 7.4, 150 mM NaCl, 0.5% w/v Triton X-100, 5 mM EDTA) + N-ethylmaleimide. Diubiquitinated GABARAP is indicated with ∗∗ . Immunoglobulin light chain is indicated with an arrow. (J) Immunoprecipitation of HEK293A cells treated with RF or GABARAP siRNA for 72 hr and expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer + N-ethylmaleimide. Di- and tri-ubiquitinated GABARAP is indicated with ∗∗ and ∗∗∗ , respectively. Immunoglobulin light chain is indicated with an arrow. (K) Two GABARAP ubiquitination sites, lysine 13 (K13) and lysine 23 (K23), were identified by mass spectrometry on three different peptides. (Top) Comparison of peak areas for the FVYKEEHPFEK(diGly)R peptide containing K13 ubiquitination site (n = 3 measurements) is shown. (Middle and bottom) The K23 ubiquitination site was detected as two different peptides as a result of missed cleavage. Quantification of peptides K(diGly)KYPDRVPVIVEK (middle) and K(diGly)KYPDR (bottom) showed significantly lower abundance in C985S mutant compared to the WT. (L) Conservation of GABARAP K13 and K23 ( ∗ ) between ATG8 orthologs. See also Figure S5 .
Figure Legend Snippet: Mib1 E3 Ligase Interacts with and Destabilizes GABARAP and Promotes GABARAP Ubiquitination at Lys13 and Lys23 (A) HEK293A cells expressing FLAG-Mib1 or control vector for 48 hr were analyzed by immunoblot. (B) Quantification of (A). Statistical analysis using unpaired Student’s t test; mean ± SEM; n = 3; ∗ p ≤ 0.001. (C) Anti-GABARAP immunoprecipitate from HEK293A cells analyzed by immunoblotting. Ab, anti-GABARAP antibody. Lys, HEK293A lysate. (D) HEK293A cells expressing FLAG-tagged constructs were incubated with recombinant GST or GST-GABARAP beads and immunoblotted. (E) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were stringently washed in denaturing buffer. CS, C985S; GAB, GABARAP; Ponc, Ponceau S. Short and long exposures are shown. ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-GABARAP, respectively. (F) Immunoprecipitation of U2OS cells expressing the indicated constructs lysed in boiling SDS buffer and immunoblot. Free ubiquitin and ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-LC3B/GABARAP are indicated, respectively. (G) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were washed as in (E). (H) See (G). Low and high exposures are shown. (I) Immunoprecipitation of HEK293A cells expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer (20 mM Tris, pH 7.4, 150 mM NaCl, 0.5% w/v Triton X-100, 5 mM EDTA) + N-ethylmaleimide. Diubiquitinated GABARAP is indicated with ∗∗ . Immunoglobulin light chain is indicated with an arrow. (J) Immunoprecipitation of HEK293A cells treated with RF or GABARAP siRNA for 72 hr and expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer + N-ethylmaleimide. Di- and tri-ubiquitinated GABARAP is indicated with ∗∗ and ∗∗∗ , respectively. Immunoglobulin light chain is indicated with an arrow. (K) Two GABARAP ubiquitination sites, lysine 13 (K13) and lysine 23 (K23), were identified by mass spectrometry on three different peptides. (Top) Comparison of peak areas for the FVYKEEHPFEK(diGly)R peptide containing K13 ubiquitination site (n = 3 measurements) is shown. (Middle and bottom) The K23 ubiquitination site was detected as two different peptides as a result of missed cleavage. Quantification of peptides K(diGly)KYPDRVPVIVEK (middle) and K(diGly)KYPDR (bottom) showed significantly lower abundance in C985S mutant compared to the WT. (L) Conservation of GABARAP K13 and K23 ( ∗ ) between ATG8 orthologs. See also Figure S5 .

Techniques Used: Expressing, Plasmid Preparation, Construct, Incubation, Recombinant, Immunoprecipitation, Lysis, Mass Spectrometry, Mutagenesis

2) Product Images from "Centriolar Satellites Control GABARAP Ubiquitination and GABARAP-Mediated Autophagy"

Article Title: Centriolar Satellites Control GABARAP Ubiquitination and GABARAP-Mediated Autophagy

Journal: Current Biology

doi: 10.1016/j.cub.2017.06.021

Mib1 E3 Ligase Interacts with and Destabilizes GABARAP and Promotes GABARAP Ubiquitination at Lys13 and Lys23 (A) HEK293A cells expressing FLAG-Mib1 or control vector for 48 hr were analyzed by immunoblot. (B) Quantification of (A). Statistical analysis using unpaired Student’s t test; mean ± SEM; n = 3; ∗ p ≤ 0.001. (C) Anti-GABARAP immunoprecipitate from HEK293A cells analyzed by immunoblotting. Ab, anti-GABARAP antibody. Lys, HEK293A lysate. (D) HEK293A cells expressing FLAG-tagged constructs were incubated with recombinant GST or GST-GABARAP beads and immunoblotted. (E) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were stringently washed in denaturing buffer. CS, C985S; GAB, GABARAP; Ponc, Ponceau S. Short and long exposures are shown. ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-GABARAP, respectively. (F) Immunoprecipitation of U2OS cells expressing the indicated constructs lysed in boiling SDS buffer and immunoblot. Free ubiquitin and ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-LC3B/GABARAP are indicated, respectively. (G) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were washed as in (E). (H) See (G). Low and high exposures are shown. (I) Immunoprecipitation of HEK293A cells expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer (20 mM Tris, pH 7.4, 150 mM NaCl, 0.5% w/v Triton X-100, 5 mM EDTA) + N-ethylmaleimide. Diubiquitinated GABARAP is indicated with ∗∗ . Immunoglobulin light chain is indicated with an arrow. (J) Immunoprecipitation of HEK293A cells treated with RF or GABARAP siRNA for 72 hr and expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer + N-ethylmaleimide. Di- and tri-ubiquitinated GABARAP is indicated with ∗∗ and ∗∗∗ , respectively. Immunoglobulin light chain is indicated with an arrow. (K) Two GABARAP ubiquitination sites, lysine 13 (K13) and lysine 23 (K23), were identified by mass spectrometry on three different peptides. (Top) Comparison of peak areas for the FVYKEEHPFEK(diGly)R peptide containing K13 ubiquitination site (n = 3 measurements) is shown. (Middle and bottom) The K23 ubiquitination site was detected as two different peptides as a result of missed cleavage. Quantification of peptides K(diGly)KYPDRVPVIVEK (middle) and K(diGly)KYPDR (bottom) showed significantly lower abundance in C985S mutant compared to the WT. (L) Conservation of GABARAP K13 and K23 ( ∗ ) between ATG8 orthologs. See also Figure S5 .
Figure Legend Snippet: Mib1 E3 Ligase Interacts with and Destabilizes GABARAP and Promotes GABARAP Ubiquitination at Lys13 and Lys23 (A) HEK293A cells expressing FLAG-Mib1 or control vector for 48 hr were analyzed by immunoblot. (B) Quantification of (A). Statistical analysis using unpaired Student’s t test; mean ± SEM; n = 3; ∗ p ≤ 0.001. (C) Anti-GABARAP immunoprecipitate from HEK293A cells analyzed by immunoblotting. Ab, anti-GABARAP antibody. Lys, HEK293A lysate. (D) HEK293A cells expressing FLAG-tagged constructs were incubated with recombinant GST or GST-GABARAP beads and immunoblotted. (E) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were stringently washed in denaturing buffer. CS, C985S; GAB, GABARAP; Ponc, Ponceau S. Short and long exposures are shown. ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-GABARAP, respectively. (F) Immunoprecipitation of U2OS cells expressing the indicated constructs lysed in boiling SDS buffer and immunoblot. Free ubiquitin and ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-LC3B/GABARAP are indicated, respectively. (G) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were washed as in (E). (H) See (G). Low and high exposures are shown. (I) Immunoprecipitation of HEK293A cells expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer (20 mM Tris, pH 7.4, 150 mM NaCl, 0.5% w/v Triton X-100, 5 mM EDTA) + N-ethylmaleimide. Diubiquitinated GABARAP is indicated with ∗∗ . Immunoglobulin light chain is indicated with an arrow. (J) Immunoprecipitation of HEK293A cells treated with RF or GABARAP siRNA for 72 hr and expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer + N-ethylmaleimide. Di- and tri-ubiquitinated GABARAP is indicated with ∗∗ and ∗∗∗ , respectively. Immunoglobulin light chain is indicated with an arrow. (K) Two GABARAP ubiquitination sites, lysine 13 (K13) and lysine 23 (K23), were identified by mass spectrometry on three different peptides. (Top) Comparison of peak areas for the FVYKEEHPFEK(diGly)R peptide containing K13 ubiquitination site (n = 3 measurements) is shown. (Middle and bottom) The K23 ubiquitination site was detected as two different peptides as a result of missed cleavage. Quantification of peptides K(diGly)KYPDRVPVIVEK (middle) and K(diGly)KYPDR (bottom) showed significantly lower abundance in C985S mutant compared to the WT. (L) Conservation of GABARAP K13 and K23 ( ∗ ) between ATG8 orthologs. See also Figure S5 .

Techniques Used: Expressing, Plasmid Preparation, Construct, Incubation, Recombinant, Immunoprecipitation, Lysis, Mass Spectrometry, Mutagenesis

3) Product Images from "Centriolar Satellites Control GABARAP Ubiquitination and GABARAP-Mediated Autophagy"

Article Title: Centriolar Satellites Control GABARAP Ubiquitination and GABARAP-Mediated Autophagy

Journal: Current Biology

doi: 10.1016/j.cub.2017.06.021

Mib1 E3 Ligase Interacts with and Destabilizes GABARAP and Promotes GABARAP Ubiquitination at Lys13 and Lys23 (A) HEK293A cells expressing FLAG-Mib1 or control vector for 48 hr were analyzed by immunoblot. (B) Quantification of (A). Statistical analysis using unpaired Student’s t test; mean ± SEM; n = 3; ∗ p ≤ 0.001. (C) Anti-GABARAP immunoprecipitate from HEK293A cells analyzed by immunoblotting. Ab, anti-GABARAP antibody. Lys, HEK293A lysate. (D) HEK293A cells expressing FLAG-tagged constructs were incubated with recombinant GST or GST-GABARAP beads and immunoblotted. (E) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were stringently washed in denaturing buffer. CS, C985S; GAB, GABARAP; Ponc, Ponceau S. Short and long exposures are shown. ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-GABARAP, respectively. (F) Immunoprecipitation of U2OS cells expressing the indicated constructs lysed in boiling SDS buffer and immunoblot. Free ubiquitin and ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-LC3B/GABARAP are indicated, respectively. (G) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were washed as in (E). (H) See (G). Low and high exposures are shown. (I) Immunoprecipitation of HEK293A cells expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer (20 mM Tris, pH 7.4, 150 mM NaCl, 0.5% w/v Triton X-100, 5 mM EDTA) + N-ethylmaleimide. Diubiquitinated GABARAP is indicated with ∗∗ . Immunoglobulin light chain is indicated with an arrow. (J) Immunoprecipitation of HEK293A cells treated with RF or GABARAP siRNA for 72 hr and expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer + N-ethylmaleimide. Di- and tri-ubiquitinated GABARAP is indicated with ∗∗ and ∗∗∗ , respectively. Immunoglobulin light chain is indicated with an arrow. (K) Two GABARAP ubiquitination sites, lysine 13 (K13) and lysine 23 (K23), were identified by mass spectrometry on three different peptides. (Top) Comparison of peak areas for the FVYKEEHPFEK(diGly)R peptide containing K13 ubiquitination site (n = 3 measurements) is shown. (Middle and bottom) The K23 ubiquitination site was detected as two different peptides as a result of missed cleavage. Quantification of peptides K(diGly)KYPDRVPVIVEK (middle) and K(diGly)KYPDR (bottom) showed significantly lower abundance in C985S mutant compared to the WT. (L) Conservation of GABARAP K13 and K23 ( ∗ ) between ATG8 orthologs. See also Figure S5 .
Figure Legend Snippet: Mib1 E3 Ligase Interacts with and Destabilizes GABARAP and Promotes GABARAP Ubiquitination at Lys13 and Lys23 (A) HEK293A cells expressing FLAG-Mib1 or control vector for 48 hr were analyzed by immunoblot. (B) Quantification of (A). Statistical analysis using unpaired Student’s t test; mean ± SEM; n = 3; ∗ p ≤ 0.001. (C) Anti-GABARAP immunoprecipitate from HEK293A cells analyzed by immunoblotting. Ab, anti-GABARAP antibody. Lys, HEK293A lysate. (D) HEK293A cells expressing FLAG-tagged constructs were incubated with recombinant GST or GST-GABARAP beads and immunoblotted. (E) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were stringently washed in denaturing buffer. CS, C985S; GAB, GABARAP; Ponc, Ponceau S. Short and long exposures are shown. ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-GABARAP, respectively. (F) Immunoprecipitation of U2OS cells expressing the indicated constructs lysed in boiling SDS buffer and immunoblot. Free ubiquitin and ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-LC3B/GABARAP are indicated, respectively. (G) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were washed as in (E). (H) See (G). Low and high exposures are shown. (I) Immunoprecipitation of HEK293A cells expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer (20 mM Tris, pH 7.4, 150 mM NaCl, 0.5% w/v Triton X-100, 5 mM EDTA) + N-ethylmaleimide. Diubiquitinated GABARAP is indicated with ∗∗ . Immunoglobulin light chain is indicated with an arrow. (J) Immunoprecipitation of HEK293A cells treated with RF or GABARAP siRNA for 72 hr and expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer + N-ethylmaleimide. Di- and tri-ubiquitinated GABARAP is indicated with ∗∗ and ∗∗∗ , respectively. Immunoglobulin light chain is indicated with an arrow. (K) Two GABARAP ubiquitination sites, lysine 13 (K13) and lysine 23 (K23), were identified by mass spectrometry on three different peptides. (Top) Comparison of peak areas for the FVYKEEHPFEK(diGly)R peptide containing K13 ubiquitination site (n = 3 measurements) is shown. (Middle and bottom) The K23 ubiquitination site was detected as two different peptides as a result of missed cleavage. Quantification of peptides K(diGly)KYPDRVPVIVEK (middle) and K(diGly)KYPDR (bottom) showed significantly lower abundance in C985S mutant compared to the WT. (L) Conservation of GABARAP K13 and K23 ( ∗ ) between ATG8 orthologs. See also Figure S5 .

Techniques Used: Expressing, Plasmid Preparation, Construct, Incubation, Recombinant, Immunoprecipitation, Lysis, Mass Spectrometry, Mutagenesis

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Mutagenesis:

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Article Snippet: .. Western Blotting Cells were lysed in ice-cold TNTE buffer (20 mM Tris-HCl, pH 7.4, 150 mM NaCl, 0.5% w/v Triton X-100, 5 mM EDTA) containing EDTA-free Complete Protease Inhibitor cocktail (Roche) and PhosSTOP (Roche). .. Lysates were cleared by centrifugation and resolved on NuPAGE Bis-Tris 4%–12% gels (Life Technologies) (or 4%–20% Tris-Glycine gels for GABARAP lipidation assays) followed by transfer onto a PVDF membrane (Millipore).

Article Title: Keratin 14 is a novel interaction partner of keratinocyte differentiation regulator: receptor-interacting protein kinase 4
Article Snippet: .. Cell lysis and western blotting Cells were washed with ice-cold PBS and then lysed using TNTE buffer (50 mM Tris-Cl [pH 7.4], 150 mM NaCl, 1 mM EDTA, 1% Triton X-100, 10% glycerol, 5 mM Na4P2O7, 2 mM Na3VO4, 20 mM NaF, 1 mM PMSF, and 1X protease inhibitor cocktail tablet [Roche, Switzerland]) on ice for 30 min. .. The lysates were centrifuged at 16,000 × g for 15 min and protein concentrations were measured using a BCA protein assay kit (Thermo Fischer Scientific, USA).

Article Title: SNX18 regulates ATG9A trafficking from recycling endosomes by recruiting Dynamin‐2
Article Snippet: .. Western blotting and immunoprecipitation For confirmation of SNX18 KO and to monitor LC3 levels, cells were lysed in TNTE buffer (20 mM Tris pH 7.4, 150 mM NaCl, 5 mM EDTA, 1% Triton X‐100) supplemented with complete protease inhibitor cocktail (Roche, 05056489001) for 5 min on ice. ..

Article Title: ULK1 Regulates Melanin Levels in MNT-1 Cells Independently of mTORC1
Article Snippet: .. Western Blot Cells were lysed in ice-cold TNTE buffer (20 mM Tris, pH 7.5, 150 mM NaCl, 0.3% wt/vol Triton X-100, 5 mM EDTA) containing EDTA-free Complete Protease Inhibitor cocktail (Roche). .. Lysates were cleared by centrifugation and resolved on NuPAGE®Bis-Tris 4–12% gels (Invitrogen) followed by transfer onto a PVDF membrane (Millipore).

Lysis:

Article Title: Keratin 14 is a novel interaction partner of keratinocyte differentiation regulator: receptor-interacting protein kinase 4
Article Snippet: .. Cell lysis and western blotting Cells were washed with ice-cold PBS and then lysed using TNTE buffer (50 mM Tris-Cl [pH 7.4], 150 mM NaCl, 1 mM EDTA, 1% Triton X-100, 10% glycerol, 5 mM Na4P2O7, 2 mM Na3VO4, 20 mM NaF, 1 mM PMSF, and 1X protease inhibitor cocktail tablet [Roche, Switzerland]) on ice for 30 min. .. The lysates were centrifuged at 16,000 × g for 15 min and protein concentrations were measured using a BCA protein assay kit (Thermo Fischer Scientific, USA).

Kinase Assay:

Article Title: CARMA2sh and ULK2 control pathogen-associated molecular patterns recognition in human keratinocytes: psoriasis-linked CARMA2sh mutants escape ULK2 censorship
Article Snippet: .. Mixed beads in vitro kinase assay HEK293T cells, separately transfected with plasmids encoding for CARMA2 polypeptides and wild-type or mutant ULK2, were lysed in ice-cold TNTE buffer (20 mM Tris, pH 7.5, 150 mM NaCl, 0,3% (vol/vol) Triton X-100, 5 mM EDTA) containing complete protease inhibitor cocktail (Roche), 25 mM β -glycerophosphate, 1 mM sodium orthovanadate, 30 nM okadaic acid, 2 mM sodium pyrophosphate. .. Lysates cleared by centrifugation were incubated with anti-FLAG monoclonal M2 antibody (Sigma Aldrich) for 1 h at room temperature and then washed three times with TNTE buffer.

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    Roche tnte buffer
    Mib1 E3 Ligase Interacts with and Destabilizes GABARAP and Promotes GABARAP Ubiquitination at Lys13 and Lys23 (A) HEK293A cells expressing FLAG-Mib1 or control vector for 48 hr were analyzed by immunoblot. (B) Quantification of (A). Statistical analysis using unpaired Student’s t test; mean ± SEM; n = 3; ∗ p ≤ 0.001. (C) Anti-GABARAP immunoprecipitate from HEK293A cells analyzed by immunoblotting. Ab, anti-GABARAP antibody. Lys, HEK293A lysate. (D) HEK293A cells expressing FLAG-tagged constructs were incubated with recombinant GST or GST-GABARAP beads and immunoblotted. (E) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were stringently washed in denaturing buffer. CS, C985S; GAB, GABARAP; Ponc, Ponceau S. Short and long exposures are shown. ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-GABARAP, respectively. (F) Immunoprecipitation of U2OS cells expressing the indicated constructs lysed in boiling SDS buffer and immunoblot. Free ubiquitin and ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-LC3B/GABARAP are indicated, respectively. (G) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were washed as in (E). (H) See (G). Low and high exposures are shown. (I) Immunoprecipitation of HEK293A cells expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in <t>TNTE</t> buffer (20 mM <t>Tris,</t> pH 7.4, 150 mM NaCl, 0.5% w/v Triton X-100, 5 mM EDTA) + N-ethylmaleimide. Diubiquitinated GABARAP is indicated with ∗∗ . Immunoglobulin light chain is indicated with an arrow. (J) Immunoprecipitation of HEK293A cells treated with RF or GABARAP siRNA for 72 hr and expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer + N-ethylmaleimide. Di- and tri-ubiquitinated GABARAP is indicated with ∗∗ and ∗∗∗ , respectively. Immunoglobulin light chain is indicated with an arrow. (K) Two GABARAP ubiquitination sites, lysine 13 (K13) and lysine 23 (K23), were identified by mass spectrometry on three different peptides. (Top) Comparison of peak areas for the FVYKEEHPFEK(diGly)R peptide containing K13 ubiquitination site (n = 3 measurements) is shown. (Middle and bottom) The K23 ubiquitination site was detected as two different peptides as a result of missed cleavage. Quantification of peptides K(diGly)KYPDRVPVIVEK (middle) and K(diGly)KYPDR (bottom) showed significantly lower abundance in C985S mutant compared to the WT. (L) Conservation of GABARAP K13 and K23 ( ∗ ) between ATG8 orthologs. See also Figure S5 .
    Tnte Buffer, supplied by Roche, used in various techniques. Bioz Stars score: 88/100, based on 9 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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    Mib1 E3 Ligase Interacts with and Destabilizes GABARAP and Promotes GABARAP Ubiquitination at Lys13 and Lys23 (A) HEK293A cells expressing FLAG-Mib1 or control vector for 48 hr were analyzed by immunoblot. (B) Quantification of (A). Statistical analysis using unpaired Student’s t test; mean ± SEM; n = 3; ∗ p ≤ 0.001. (C) Anti-GABARAP immunoprecipitate from HEK293A cells analyzed by immunoblotting. Ab, anti-GABARAP antibody. Lys, HEK293A lysate. (D) HEK293A cells expressing FLAG-tagged constructs were incubated with recombinant GST or GST-GABARAP beads and immunoblotted. (E) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were stringently washed in denaturing buffer. CS, C985S; GAB, GABARAP; Ponc, Ponceau S. Short and long exposures are shown. ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-GABARAP, respectively. (F) Immunoprecipitation of U2OS cells expressing the indicated constructs lysed in boiling SDS buffer and immunoblot. Free ubiquitin and ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-LC3B/GABARAP are indicated, respectively. (G) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were washed as in (E). (H) See (G). Low and high exposures are shown. (I) Immunoprecipitation of HEK293A cells expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer (20 mM Tris, pH 7.4, 150 mM NaCl, 0.5% w/v Triton X-100, 5 mM EDTA) + N-ethylmaleimide. Diubiquitinated GABARAP is indicated with ∗∗ . Immunoglobulin light chain is indicated with an arrow. (J) Immunoprecipitation of HEK293A cells treated with RF or GABARAP siRNA for 72 hr and expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer + N-ethylmaleimide. Di- and tri-ubiquitinated GABARAP is indicated with ∗∗ and ∗∗∗ , respectively. Immunoglobulin light chain is indicated with an arrow. (K) Two GABARAP ubiquitination sites, lysine 13 (K13) and lysine 23 (K23), were identified by mass spectrometry on three different peptides. (Top) Comparison of peak areas for the FVYKEEHPFEK(diGly)R peptide containing K13 ubiquitination site (n = 3 measurements) is shown. (Middle and bottom) The K23 ubiquitination site was detected as two different peptides as a result of missed cleavage. Quantification of peptides K(diGly)KYPDRVPVIVEK (middle) and K(diGly)KYPDR (bottom) showed significantly lower abundance in C985S mutant compared to the WT. (L) Conservation of GABARAP K13 and K23 ( ∗ ) between ATG8 orthologs. See also Figure S5 .

    Journal: Current Biology

    Article Title: Centriolar Satellites Control GABARAP Ubiquitination and GABARAP-Mediated Autophagy

    doi: 10.1016/j.cub.2017.06.021

    Figure Lengend Snippet: Mib1 E3 Ligase Interacts with and Destabilizes GABARAP and Promotes GABARAP Ubiquitination at Lys13 and Lys23 (A) HEK293A cells expressing FLAG-Mib1 or control vector for 48 hr were analyzed by immunoblot. (B) Quantification of (A). Statistical analysis using unpaired Student’s t test; mean ± SEM; n = 3; ∗ p ≤ 0.001. (C) Anti-GABARAP immunoprecipitate from HEK293A cells analyzed by immunoblotting. Ab, anti-GABARAP antibody. Lys, HEK293A lysate. (D) HEK293A cells expressing FLAG-tagged constructs were incubated with recombinant GST or GST-GABARAP beads and immunoblotted. (E) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were stringently washed in denaturing buffer. CS, C985S; GAB, GABARAP; Ponc, Ponceau S. Short and long exposures are shown. ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-GABARAP, respectively. (F) Immunoprecipitation of U2OS cells expressing the indicated constructs lysed in boiling SDS buffer and immunoblot. Free ubiquitin and ∗ , ∗∗ , ∗∗∗ , mono-, di-, and tri-ubiquitinated GFP-LC3B/GABARAP are indicated, respectively. (G) GFP-TRAP of HEK293A cells expressing the indicated constructs and immunoblot. Immunoprecipitates were washed as in (E). (H) See (G). Low and high exposures are shown. (I) Immunoprecipitation of HEK293A cells expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer (20 mM Tris, pH 7.4, 150 mM NaCl, 0.5% w/v Triton X-100, 5 mM EDTA) + N-ethylmaleimide. Diubiquitinated GABARAP is indicated with ∗∗ . Immunoglobulin light chain is indicated with an arrow. (J) Immunoprecipitation of HEK293A cells treated with RF or GABARAP siRNA for 72 hr and expressing the indicated constructs and immunoblot. Cells were treated with MG132 for 5 hr prior to lysis in TNTE buffer + N-ethylmaleimide. Di- and tri-ubiquitinated GABARAP is indicated with ∗∗ and ∗∗∗ , respectively. Immunoglobulin light chain is indicated with an arrow. (K) Two GABARAP ubiquitination sites, lysine 13 (K13) and lysine 23 (K23), were identified by mass spectrometry on three different peptides. (Top) Comparison of peak areas for the FVYKEEHPFEK(diGly)R peptide containing K13 ubiquitination site (n = 3 measurements) is shown. (Middle and bottom) The K23 ubiquitination site was detected as two different peptides as a result of missed cleavage. Quantification of peptides K(diGly)KYPDRVPVIVEK (middle) and K(diGly)KYPDR (bottom) showed significantly lower abundance in C985S mutant compared to the WT. (L) Conservation of GABARAP K13 and K23 ( ∗ ) between ATG8 orthologs. See also Figure S5 .

    Article Snippet: To inhibit deubiquitinases cells were lysed in TNTE buffer (20 mM Tris-HCl pH 7.4, 150 mM NaCl, 5 mM EDTA, 0.5% Triton X-100, 1x Complete protease inhibitor (Roche), 1x PhosSTOP (Roche)) supplemented with 20 mM N-Ethylmaleimide (NEM) prior to immunoprecipitation as described.

    Techniques: Expressing, Plasmid Preparation, Construct, Incubation, Recombinant, Immunoprecipitation, Lysis, Mass Spectrometry, Mutagenesis