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3 protocols using suc leu leu 5 al tyr aminomethylcoumarin suc llvy amc

1

Ubiquitin-Proteasome System Assay

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PtPT was synthesized in our lab. Other agents are bortezomib (BD Biosciences, San Jose, CA); NEM, Penicillin, Streptomycin, Cisplatin (Sigma–Aldrich Inc., St. Louis, MO); b-AP15, Suc-Leu-Leu-V al-Tyr-aminomethylcoumarin (Suc-LLVY-AMC), Z-Leu-Leu-Glu-AMC (Z-LLE-AMC), Boc-Leu-Arg-Arg-AMC (Boc-LRR-AMC), 19S, 20S and 26S human proteasomes, HA-Ubiquitin-Vinyl Sulfone (HA-Ub-VS), K48-linked tetra-ubiquitin, ubiquitin-AMC (U550) (BostonBiochem, Cambridge, MA). Antibodies used in this study were purchased from following sources: anti-ubiquitin (P4D1), anti-p27 (F-8), anti-GFP (B-2) (Santa Cruz Biotechnology, Santa Cruz, CA); anti-p21 Waf1/Cip1 (DCS60), anti-caspase3 (8G10), anti-caspase8 (1C12), anti-caspase9 (C9), anti-PARP, anti-K48-linkage specific polyubiquitin (D9D5), anti-phospho-histone H2AX (Ser139) (20E3), anti-phospho-ATM (Ser1981) (D6H9), anti-phospho-Chk1 (Ser345) (133D3), anti-phospho-Chk2 (Thr68) (C13C1) (Cell Signaling Technology, Beverly, MA, USA); anti-GAPDH, anti-HA-tag (Bioworld Technology, Inc., St. Louis Park, MN, USA). Propidium iodide (PI) and Annexin V-FITC/PI apoptosis detection Kit were purchased from Keygen Company (Nanjing, China). 4,6-Diamidino-2-phenylindole (DAPI) was from Invitrogen (Guangzhou, China). Enhanced chemiluminescence (ECL) reagents were purchased from Santa Cruz Biotechnology Inc. (Santa Cruz, CA, USA).
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2

Proteasome Inhibition and Ubiquitination Assays

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Bilirubin and biliverdin were purchased from Sigma-Aldrich Inc. (St. Louis, MO, USA). Other agents used include NEM (Sigma-Aldrich Inc.), the Proteasome-Glo Chymotrypsin-like Cell-Based Assay kit (Promega Bioscience, Madison, WI, USA), Suc-Leu-Leu-Val-Tyr-aminomethylcoumarin (Suc-LLVY-AMC), Boc-Leu-Arg-Arg- aminomethylcoumarin (Boc-LRR-AMC), Z-Leu-Leu-Glu-AMC, 20S and 26S human proteasome preparations, HA-Ub-VS, K48-linked tetraubiquitin, Ubiquitin-AMC (U550) (Boston Biochem, Cambridge, MA, USA), JC-1 (Beyotime, Shanghai, China) and MTS assay kit (CellTiter 96 Aqueous One Solution reagent) (Promega Corporation, Madison, WI, USA). Antibodies used in this study and their sources are: anti-ubiquitin (P4D1) (Santa Cruz Biotechnology Inc., Santa Cruz, CA, USA), anti-K48-linkage specific polyubiquitin (D9D5), anti-Bax (D3R2M) (Cell Signaling Technology, Beverly, MA, USA), anti-GAPDH, anti-HA-tag (Bioworld Technology, Inc., Louis Park, MN, USA) and anti-Tau-1, (Invitrogen, Carlsbad, CA, USA). Enhanced chemiluminescence (ECL) reagents were purchased from Santa Cruz Biotechnology Inc.
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3

Ubiquitin-Proteasome System Assay

Check if the same lab product or an alternative is used in the 5 most similar protocols
PtPT was synthesized in our lab. Other agents are bortezomib (BD Biosciences, San Jose, CA); NEM, Penicillin, Streptomycin, Cisplatin (Sigma–Aldrich Inc., St. Louis, MO); b-AP15, Suc-Leu-Leu-V al-Tyr-aminomethylcoumarin (Suc-LLVY-AMC), Z-Leu-Leu-Glu-AMC (Z-LLE-AMC), Boc-Leu-Arg-Arg-AMC (Boc-LRR-AMC), 19S, 20S and 26S human proteasomes, HA-Ubiquitin-Vinyl Sulfone (HA-Ub-VS), K48-linked tetra-ubiquitin, ubiquitin-AMC (U550) (BostonBiochem, Cambridge, MA). Antibodies used in this study were purchased from following sources: anti-ubiquitin (P4D1), anti-p27 (F-8), anti-GFP (B-2) (Santa Cruz Biotechnology, Santa Cruz, CA); anti-p21 Waf1/Cip1 (DCS60), anti-caspase3 (8G10), anti-caspase8 (1C12), anti-caspase9 (C9), anti-PARP, anti-K48-linkage specific polyubiquitin (D9D5), anti-phospho-histone H2AX (Ser139) (20E3), anti-phospho-ATM (Ser1981) (D6H9), anti-phospho-Chk1 (Ser345) (133D3), anti-phospho-Chk2 (Thr68) (C13C1) (Cell Signaling Technology, Beverly, MA, USA); anti-GAPDH, anti-HA-tag (Bioworld Technology, Inc., St. Louis Park, MN, USA). Propidium iodide (PI) and Annexin V-FITC/PI apoptosis detection Kit were purchased from Keygen Company (Nanjing, China). 4,6-Diamidino-2-phenylindole (DAPI) was from Invitrogen (Guangzhou, China). Enhanced chemiluminescence (ECL) reagents were purchased from Santa Cruz Biotechnology Inc. (Santa Cruz, CA, USA).
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