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8 protocols using anti tip60

1

Protein Expression and IP Analysis

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Analysis of protein expression and IP experiments was performed by resolving proteins by SDS-PAGE, transfer to PVDF and immunoblotting. Primary antibodies used for immunoblotting were: anti-FLAG (Proteintech, 20543-1-AP, 1:4000), anti-HA (Cell Signaling, 2367, 6E2, 1:1125), anti-NAF1 (Abcam, ab157106, 1:1000), anti-NHP2 (Proteintech, 15128–1-AP, 1:5000), anti-NOP10 (Abcam, ab134902, 1:500), anti-TCAB1 (Novus, NB100–68252, 1:2000), anti-reptin (Abcam, ab51500, 1:5000), anti-hTERT (Santa Cruz, sc7215, C-20, 1:500), anti-dyskerin (Santa Cruz, sc-373956, H-3, 1:1500), anti-PARN (Abcam, ab154214, 1:500), anti-RRP40 (Bethyl, A303–909A-T, 1/1500), anti-TIP60 (Santa Cruz, sc5725, N-17, 1/1000), anti-hGAR1 (from Dr Witold Filipowicz (40 (link)), 1/2000) and anti-actin (Chemicon MAB1501, 1:5000).
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2

Chromatin Immunoprecipitation Assay Protocol

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Chromatin immunoprecipitation assays were performed essentially as described before (Liu et al., 2018 (link), 2019a (link),b (link); Zeng et al., 2018 (link); Zhang et al., 2018 (link); Li et al., 2018a (link)–e (link), 2019b –f ; Yang Y. et al., 2018 (link); Yang et al., 2019a (link),b (link); Fan et al., 2019 (link); Lu et al., 2019 (link); Shao et al., 2019 (link); Weng et al., 2019 (link); Zhao et al., 2019 (link); Kong et al., 2019a (link),b (link)). Briefly, chromatin was cross-linked with 1% formaldehyde. DNA was fragmented into 500 bp pieces using a Branson 250 sonicator (30% output power; 6 cycles of 10s sonication + 10s intermission). Aliquots of lysates containing 200 μg of protein were used for each immunoprecipitation reaction with anti-MRTF-A (Santa Cruz, sc-32909), anti-Tip60 (Santa Cruz, sc-166323), anti-trimethyl H3K4 (Millipore, 07–473), anti-acetyl H3K9 (Millipore, 07–352), anti-acetyl H3K27 (Millipore, 07–360), anti-acetyl H4K16 (Millipore, 07–328), anti-ASH2 (Bethyl Laboratories, A300–489A), or pre-immune IgG. Precipitated DNAs were amplified with the following primers: Nos2 promoter, 5′-AGAGTGATGTAATCAAGCAC-3′ and 5′-AAAGTTGTGACCCTGGCAG-3′; Gapdh promoter, 5′-ATCACTGCCACCCAGAAGACTGTGGA-3′ and 5′- CTCATACCAGGAAATGAGCTTGACAAA -3′.
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3

Protein Extraction and Western Blotting

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Total lysates were prepared from cells using NP40 lysis buffer (50 mM Tris-HCL [pH 8.0], 150 mM NaCl, 0.1% SDS, 0.5% SDC, 1% NP40, 0.5 × protease inhibitor cocktail, 1 mM EDTA [pH 8.0]). The lysates were rotated 30 min at 4 ℃, sonicated on ice for 10 s and centrifuged. The lysates were fractionated on sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) gel and transferred to nitrocellulose membranes. The membranes were probed at 4 ℃ overnight with the primary antibodies anti-UHRF1 (1:1000, sc-373750, Santa Cruz), anti-TIP60 (1:500, sc-166323, Santa Cruz), anti-GFP (1:1000, sc-9996, Santa Cruz), anti-mouse IgG (1:1000, sc-2025, Santa Cruz), anti-FLAG® M2 (1:10000, F3165, Sigma), anti-Rabbit IgG (1:5000, 12–370, Merck) and anti-β-actin (1:1000, sc-47778, Santa Cruz). The blots were incubated with horseradish peroxidase (HRP)-conjugated goat anti-rabbit or goat anti-mouse IgG (1:5000, Enzo Life Sciences) and detected using an ECL system (ABClon).
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4

Comprehensive Antibody Validation for Diverse Assays

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Antibodies used for western blots (all diluted by 1:2000) include anti-Flag (M2)-HRP (Sigma, A8592), anti-H3 (CST, 9715), anti-GAPDH (CST, 2118), anti-β-Tubulin (CST, 2146), Streptavidin-HRP (CST, 3999) and anti-GFP (CST, 2956). Antibodies used for FACS (all diluted by 1:100) include c-KitAPC (Invitrogen, 17-1172-82), c-KitFITC (eBioscience,11-1171-85), Cd34APC (eBioscience, 50-0341-82), Cd34FITC (BD, 560238), Mac1APC (BD, 557686), Mac1FITC (eBioscience, 11-0112-85), Gr1FITC (eBioscience, 11-5931-85), Cd4FITC (eBioscience,11-0042-82), Cd8aFITC (eBioscience,11-0081-82), and Cd19FITC (eBioscience,11-0193-82). Antibodies used in ChIP, ChIP-seq and CUT&RUN assays include anti-Flag (Sigma, F1804), anti-HA (Abcam, ab9110), anti-GFP (Abcam, ab290), anti‐H3K36me3 (Abcam, ab9050), anti-H3K27ac (Abcam, ab4729), anti‐H3K27me3 (Millipore, 07-449), anti-H4ac (Millipore, 06-866), anti-BRD4 (Bethyl, A301-985A100) and anti-Tip60 (Santa Cruz, sc-166323). 10 ug antibodies were mixed with 100 μl Dynabeads for each ChIP or ChIP-seq assay. All antibodies used in CUT&RUN assays were diluted by 1:100.
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5

Evaluating DNA Damage Response in A-T Cells

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GM5849 A-T cells (Coriell Institute, NJ) were cultured according to the suppliers’ recommendations. Cells were transfected using Lipofectamine 2000 according to the manufacturer’s instructions (Invitrogen, CA). Clonogenic cell survival assays were done as previously described [16 (link)–18 (link)]. Antibodies used were ATM antibodies 5C2 and 2C1 (Genetex, San Antonio, TX), phospho-Ser 1981 (Rockland, Gilbertsville, PA), P53 (Calbiochem), anti-phospho-Ser 15 P53 (EMD Biosciences), H2AX (Oncogene Science), anti-cH2AX (Cell Signaling), anti-phospho-Thr 68 Chk2 (Cell Signaling Technology), anti-Tip60 (Santa Cruz), anti-HA (Abcam), anti-Myc (Cell Signaling).
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6

Quantitative Protein Expression Analysis

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Whole cell lysates were obtained by re-suspending cell pellets in RIPA buffer (50 mM Tris pH7.4, 150 mM NaCl, and 1% Triton X-100) with freshly added protease inhibitor (Roche) as previously described (Zeng et al., 2018 (link); Li et al., 2018e (link); Fan et al., 2019 (link)). Nuclear proteins were extracted essentially as described before (Li et al., 2018d (link)). Antibodies were incubated with cell lysates overnight before being absorbed by Protein A/G-plus Agarose beads. Precipitated immune complex was released by boiling with 1X SDS electrophoresis sample buffer. Western blot analyses were performed with anti-MRTF-A (Santa Cruz, sc-32909), anti-Tip60 (Santa Cruz, sc-166323), anti-iNOS (Santa Cruz, sc-651), and anti-β-actin (Sigma, A2228) antibodies. Image J software was used for densitometrical quantification and densities of target proteins were normalized to those of β-actin. Data are expressed as relative protein levels compared to the control group which is arbitrarily set as 1.
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7

Antibodies and Reagents for DNA Damage Response

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The antibodies used in the present work were as follows: anti‐Flag (F3165, Sigma‐Aldrich), anti‐Flag@M2 Affinity Gel(AZ220, Sigma), anti‐TIP60 (sc‐166323, Santa Cruz Biotechnology), anti‐SENP3 (ab124790, Abcam), anti‐DNA‐PKcs (ab32556, Abcam), anti‐DNA‐PKcs pT2609 (ab97611) and pS2056 (ab18192) (both Abcam), anti‐ATM (sc‐135663, Santa Cruz Biotechnology), anti‐ATM pS1981 (ab81292, Abcam), anti‐HA (H9658, Sigma), anti‐acetylated‐lysine antibody (9441s, Cell Signaling Technology), anti‐histone H4 (2592) and anti‐CHK2 pT68 (2661) (both Cell Signaling Technology), anti‐H4K16ac (13534s, Cell Signaling Technology), anti‐CHK1 (sc‐8408, Santa Cruz Biotechnology), anti‐CHK1 pS345 (2348s, Cell Signaling Technology), anti‐CHK2 (ab109413, Abcam), anti‐β‐actin (TA‐09, ZSGB‐BIO), anti‐γH2AX(05‐636, EMD Millipore), Alexa Fluor 488‐labelled Goat Anti‐Mouse IgG(H+L)(A‐21202, Invitrogen), Alexa Fluor 568‐labelled Goat Anti‐ Rabbit IgG(H+L) (A‐11036, Invitrogen). Cisplatin (PHR1624), etoposide (E1383), campathecin (C9911) and mitomycin C (M0503) were purchased from Sigma‐Aldrich. Annexin V, FITC Apoptosis Detection Kit (AD10) was purchased from DOjindo.
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8

Western Blot and Immunofluorescence Assay

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Western blotting was performed using the antibody recognizing anti-acetyl lysine (Millipore; AB3879), anti-GFP (Roche; 11 814 460 001), Anti-Tip60 (K17, Santa Cruz), Anti-β Tubulin (Ab6046, Abcam), β-actin (Sigma), Cleaved caspase 3 (Asp175) (91164; Cell Signalling), H4K8 (Millipore; 07-328), H4K16 (Millipore; 07-329), H3 (Abcam; AB1791). Immunofluorescent detection of γH2AX was performed using Antibody JBW301 (Millipore) and 53BP1 (Bethyl Laboratories; A300-272A) with a Texas Red and FITC-conjugated secondary antibodies respectively (Jackson Immunoresearch).
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