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10 protocols using h3k18ac

1

Chromatin Immunoprecipitation Assay for Epigenetic Regulation

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Cells were harvested at 80% confluency after 48 h with or without cumate. Trypsin was used to remove cells from the plate and then neutralized with PBS containing FBS and spun down to collect the cell pellet. The cell pellet was washed with cold PBS 1x prior to using Abcam Ab500 ChIP Kit. H3K9ac (Abcam ab4441), H3K18ac (Abcam ab1191), and SIRT6 (Cell Signaling #12486) antibodies were used. The manufacturer's protocol was used with the following considerations: Fixation time = 10 min at 37°C, Sonication settings (Qsonica Instrument) = 12.5 min, 15 s on/off, 30% output, 4°. qPCR primers from (Kawahara et al, 2009 (link); Tasselli et al, 2016 (link)) were used.
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2

Comprehensive Antibodies Analysis Protocol

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Antibodies used were as follows: PD-1 (CST, 86163S and 84651S; eBioscience, 12-9969-41), mouse immunoglobulin 1κ (IgG1κ) isotype control (eBioscience, 12-4714-81), p53 (Santa Cruz Biotechnology, sc-126; Leica Biosystems, P53-CM5P; CST, 2524S), p21 (Santa Cruz Biotechnology, sc-6246), vinculin (Sigma-Aldrich, V9131), normal IgG (Santa Cruz Biotechnology, sc-2025 and sc-2027), p300 (CST, 54062S), CBP (Santa Cruz Biotechnology, sc-7300-x), Flag (Sigma-Aldrich, A2220 and F7425), H3K18ac (Abcam, ab1191), H3K27ac (Abcam, ab4729), H4K16ac (Millipore, 07-329), HA (Sigma-Aldrich, A2095; Roche, 11867423001), glyceraldehyde-3-phosphate dehydrogenase (GAPDH; Santa Cruz Biotechnology, sc-32233), HDAC1 (Santa Cruz Biotechnology, sc-81598), H3 (CST, 4499T; Abcam, ab1791), Ki-67 (CST, 9449S), p-AKT-S473 (CST, 4060S), p-mTOR-S2448 (CST, 2976S), Ac-p53-K120 (homemade), and Ac-p53-K164 (homemade).
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3

Chromatin Modification Antibody Validation

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H3K27ac (39,133, Active Motif Lot # 31814008), H3K27ac (39,685, Active Motif, no. 14517014), H3K18ac (ab1191, Abcam, no. GR3211480–1), H3K27me3 (9756, Cell Signaling), H3K9ac (ab4441, Abcam), H4K16ac (39,167, Active Motif), H3 general (ab1791, Abcam, no. GR177884–2), Spike-In antibody (61,686, Active Motif, Lot# 00419007), p300 (sc-584, Santa Cruz, Lot # F3016), Gapdh (2118, Cell Signaling, Lot # 10), CBP(D6C5) (7389S, Cell Signaling), p53(CM5) (NCL-L-p53-CM5p, Leica Biosystems), PKCs p2056 (ab18192, Abcam), KAP1/TRIM29 pS824 (A300-767A, Bethyl), Acetyl-p53 (Lys379) (2570, Cell Signaling), anti-mouse IgG-HRP (NA93V, GE, no.9773218), anti-rabbit IgG-HRP (170–6515, Bio-Rad, no. 350003248).
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4

Purification and Analysis of Rtt109 Modifications

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His-tagged fusion proteins were prepared using Ni-NTA agarose beads (Qiagen, UK) according to the manufacturer’s protocol and HA epitope-tagged Pkc1p were prepared essentially as described previously (Darieva et al., 2012 (link)). Recombinant histone H3 was made commercially (Active Motif).
Pulldown assays with immunoprecipitated HA-Pkc1 from DZ2 cells and in vitro translated Rtt109 were carried out as described previously (Pic-Taylor et al., 2004 (link)).
To detect epitope-tagged derivatives by western analysis, anti-HA (Roche) and anti-tubulin TAT-1 (CRUK), H3K56ac (Active motif), H3K9ac (Abcam), H3K18ac (Abcam), H3 (Active motif), myc epitope (Santa Cruz), H3T45-P (Active motif) antibodies and Supersignal west dura substrate (Pierce) were used.
Rabbit polyclonal monospecific antibody against the phosphothreonine at amino acid 46 on yeast Rtt109 (Rtt109 T46-P) was generated from immunizing rabbits with a KLH-conjugated peptide (H-DDKRVPKST(PO3H2)IKTC-NH2), and then cross-affinity purification of polyclonal antibodies specific to modified Rtt109 T46-P or non-modified pRtt109 was performed (Eurogentec). For immunoblotting analysis we used 1:1000 dilution for both antibodies.
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5

Histone Purification and Antibody Analysis

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Histones were purified from cells using a standard acid extraction protocol (Shechter et al., 2007 (link)). Whole cell lysates were prepared by boiling cell pellets in 2x Laemmli sample buffer for 5 minutes followed by brief vortexing. The following antibodies were used in this study: Pan-KCr (PTM-Biolabs 501), H3K18Cr (PTM-Biolabs 517), pan-KAc (PTM-Biolabs 105), H3K18Ac (Abcam 1191), H3K27Ac (Active Motif 39685), H3K56Ac (Abcam 76307), H3 (Abcam 1791), p300 (Santa Cruz 584), CBP (Santa Cruz 7300), ACSS2 (Cell Signaling 3658), alpha-actin (Sigma A2066), beta-actin (Abcam 8224), and lamin-A (Abcam 26300). The ACL antibody was a gift from the Thompson Lab.
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6

Immunofluorescence Imaging of Cellular Proteins

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Cell culture reagents were purchased from Gibco. Antibodies and reagents used were as follows: Cav-2 (BD 610685), lamin A/C (BD 612162) and E-cadherin (BD 610182), antibodies from BD Transduction Laboratories; lamin A/C (sc-20681), lamin B1 (sc-30264), α-tubulin (sc-5286), maltose-binding protein (MBP) (sc-73416), emerin (sc-15378), GFP (sc-9996), histone H3 (sc-10890), histone H1 (sc-8030), protein-tyrosine phosphatase 1B (PTP1B) (sc-1718), GCN5 (sc-20698) and p300 (sc-585) antibodies from Santa Cruz Biotechnology; pY19-Cav-2 (ab3417), lamin B-receptor (LBR) (ab169306), H3K9me3 (ab8898), H3K9ac (ab32129), H3K18ac (ab1191) and H3K27ac (ab4729) antibodies from Abcam; GFP (#2555) antibody from Cell Signaling; AcH3 (06-599), RNA Pol II (05-623), H3K4ac (07-539), and H3K14ac (07-353) antibodies from Millipore; FITC-conjugated anti-mouse (F9006), TRITC-conjugated anti-rabbit (T5268), horseradish peroxidase (HRP)-conjugated anti-mouse (A4416) and anti-rabbit (A6154) antibodies and 4′-6-diamidino-2-phenylindole (DAPI) (D8417), curcumin (C1386), butyrolactone 3 (M2449) and sodium ortho-vanadate (S6508) from Sigma; human insulin from Eli Lilly.
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7

Comprehensive Histone Modification Analysis

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Histone modifications primary antibodies: H3K4me3 (Millipore, Billerica, MA), H3K9ac (Cell Signaling, Boston, MA), ChIP grade H3K9ac (Abcam, UK), H3K9ac (Millipore, Billerica, MA), H3K9me3 (Millipore), H3K14ac (Millipore), H3K18ac (Cell Signaling), H3K18ac (Abcam), ChIP grade H3K27ac (Abcam), H3K27me3 (Millipore), H3 (Abcam), H4K16ac (Santa Cruz Biotechnology Inc., Dallas, Texas).
Non-histone primary antibodies: HA (Abcam).
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8

Cell Proliferation Assay Protocol

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The CellTiter 96 Aqueous ONE Solution Cell Proliferation Assay was purchased from Promega Corp. (Madison, WI, USA). NVP-AUY922 (AUY922) (>99% purity) was from Selleckchem.com (Houston, TX, USA). Ganetespib (STA9090) (98.79% purity) and SNX2112 (98% purity) were purchased from ApexBio (Houston, TX, USA). AT13387 (>98%) was from MedChem Express (Princeton, NJ, USA), CUDC305 (>98% purity) was from AbMole BioScience (Houston, TX, USA), and dimethyl sulfoxide (DMSO) was from Sigma-Aldrich (St. Louis, MO, USA). AUY922, ganetespib, SNX2112, AT13387, and CUDC305 were dissolved in DMSO separately and stored at −20 °C. Polyclonal antibodies against histone H3, H4, H3K4me3, H3K18ac, and H4K12ac were purchased from Abcam (Cambridge, MA, USA). Monoclonal or polyclonal antibodies against acetyl-histone H3, acetyl-histone H4, and H3K27ac were bought from EMD Millipore Corporation (Billerica, MA, USA). Monoclonal or polyclonal antibodies against histone H3K4me1, H3K4me2, H3K23ac, H3K79me1, H3K79me2, H4K8ac, and H4K20me3 were obtained from Cell Signaling Technology (Danvers, MA, USA). Restore Western Blot Stripping Buffer was from Thermo Scientific (Rockford, IL, USA). All other reagents were from Sigma-Aldrich.
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9

Immunohistochemical Analysis of TMAs

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Representative tumor areas in all patients (n=278), and nontumor areas in 52 patients were obtained and embedded on paraffin blocks. Tissue cores 2.0 mm in diameter were collected from paraffin-embedded donor blocks and embedded in tissue microarray (TMA) blocks. IHC staining was performed on 4 μm TMA section slides using Bond-Max auto-stainer (Leica, Wetzlar, Germany). After incubation with primary antibodies, Bond Polymer Refine Detection kit (Leica) was used for chromogenic reaction. The following primary antibodies were used in this study; ELK4 (1:50, rabbit polyclonal, Novus, Littleton, CO, USA), SIRT7 (1:100, rabbit polyclonal, Abcam, Cambridge, MA, USA), and H3K18ac (1:1000, rabbit polyclonal, Abcam).
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10

Quantitative Western Blot Analysis

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Tissues and cells were lysed in RIPA lysis buffer (Beyotime, Jiangsu, China). The lysates were centrifuged at 12,000 rpm at 4℃ for 10 min. Equal amounts of protein were separated using 10-15% sodium dodecyl sulfonate-polyacrylamide gel electrophoresis and transferred to nitrocellulose membranes (Boguang, Shanghai, China) subsequently. For immunodetection, the membranes were respectively incubated with antibodies specific for HDAC9 (Epitomics, Burlingame, CA), H3K18ac (Abcam, Cambridge,
UK) and GAPDH (Epitomics, Burlingame, CA). The immunoblotting sample was incubated with horseradish peroxidase (HRP)-coupled anti-rabbit secondary antibodies (ProteinTech, Chicago, USA) and visualized using enhanced chemiluminescence (Pierce, Rockford, USA)
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