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15 protocols using anti myc antibody

1

ChIP-seq Analysis of Myc-tagged TBP

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SPT15-myc13::HIS3 strain HQY366 (Qiu et al., 2004 (link)), isogenic to BY4741 was cultured in the presence or absence of SM treated and subjected to ChIP-seq analysis as described previously (Qiu et al., 2015 ) except that chromatin samples containing 5.0μg DNA were immunoprecipitated with anti-myc antibodies (Roche). Paired-end sequencing libraries were prepared from immunoprecipitated DNA using Illumina paired-end kits from New England Biolabs (cat. #E7370 and #E7335). Numbers of aligned paired reads from TBP-myc13 ChIP-seq and reproducibility of replicates are summarized in Table S3. The distribution of TBP (median occupancy, and the ranges corresponding to 5-95 and 25-75 percentiles) was depicted in Fig. 5F for the 62 class “O” UC target genes in ‘O UC targets’, Data S3.
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2

Immunoblot and Co-immunoprecipitation Protocols

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For immunoblot analysis, proteins were extracted from plant tissues directly into loading buffer (0.125 M Tris-HCl, pH 7.5, 4% SDS, 20% Glycerol, 0.2 M DTT, 0.02% Bromophenol Blue) while yeast protein extraction was performed following a post-alkaline method.56 (link) For co-immunoprecipitation experiments agrobacterium cultures were infiltrated at OD600 = 0.5 and proteins were extracted as previously described.57 (link) For immunodetection, proteins were separated by SDS-PAGE and transferred to nitrocellulose membranes which were blocked in 5% skimmed milk. Membranes were incubated with Anti-HA-Peroxidase, High Affinity (Roche, ref. 12013819001) or mouse anti-GFP (Roche, ref. 11814460001) and anti-Myc antibodies (Roche, ref. 11667149001) followed by goat anti-mouse antibodies conjugated with horseradish peroxidase (Biorad, ref. 170–5047), or polyclonal rabbit anti-luciferase (Sigma-Aldrich, REF L0159), anti-GAL4BD (Sigma-Aldrich, REF G3042) and anti-VP16 (Sigma-Aldrich, REF V4388) antibodies followed by anti-rabbit horseradish peroxidase (Sigma) to detect -HA, YFP, Myc, nLUC, cLUC, GAL4BD and VP16 tagged proteins respectively. Signals were detected using the SuperSignal West Femto chemiluminescence kit (Pierce). Ponceau S was used to stain membranes to confirm equal protein loading.
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3

Coimmunoprecipitation of Myc-tagged Proteins

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Coimmunoprecipitation analyses were performed as previously described in Bermudez-Lopez et al. (2015) (link). Cells were mechanically broken in 50 mM HEPES, 150 mM KCl, 1.5 mM MgCl2, 0.5 mM DTT, and 0.5% Triton X-100 (pH 7.5) supplemented with Complete protease inhibitor cocktail tablets (from Roche). Cell extracts were incubated with beads for 2 h at 4°C. Myc-tagged proteins were immunoprecipitated using anti-Myc antibodies (Roche, 9E10) coupled to protein G Dynabeads (Invitrogen). Bound proteins were eluted with SDS-PAGE loading buffer and analyzed by Western blot.
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4

CHIP Dimerization and E2 Binding Assay

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For the E2 association assay, cells transfected with CHIP WT, CHIP p.Glu278fs, or CHIP Δ278–303 were harvested in NP40 lysis buffer (50 mM Tris–HCL pH 7.5, 150 mM NaCl, 2 mM EDTA, 1 mM NA3VO4, 0.1 M NaF, 0.1% NP40, 1 mM PMSF). Cell lysates (1 mg) were incubated overnight with anti-FLAG antibodies (3.8–4.2 μg, Sigma-Aldrich, USA) at 4 °C. For the dimerization assay, cells transfected with CHIP-Myc along with CHIP WT-FLAG, CHIP p.Glu278fs-FLAG, CHIP Δ278–303-FLAG were harvested in NP40 lysis buffer. Cell lysates (1 mg) were incubated overnight with anti-FLAG antibodies (3.8–4.2 μg, Sigma-Aldrich, USA) or anti-Myc antibodies (2 μg, Roche, Switzerland) at 4 °C. Immunocomplexes were isolated with protein A-Sepharose beads saturated with 1% bovine serum albumin (BSA) by rotating for 5 h at 4 °C. After washing, bound proteins were denatured, eluted, and resolved by 12% polyacrylamide SDS-PAGE.
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5

Isolation of Myc-tagged Protein Complexes

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Cells were grown to OD600 = 1 wash in cold water and resuspended in ice-cold buffer (50 mM HEPES, 150 mM KCl, 1.5 mM MgCl2, 0.5 mM DTT, and 0.5% Triton X-100 (pH 7.5) supplemented with Complete protease inhibitor cocktail tablets (from Roche)). Cells were broken in a FastPrep® FP120 (BIO101) by 3 repetitions of a 20 seconds cycle, power setting 5.5. Extracts were maintained on ice for 2 minutes after each cycle. To the cell extract 0.5mM CaCl2, 20 U DnaseI (NEB), 0.2 mg RNaseA (Qiagen) and 500 U Benzonase (Millipore) were added in order to degrade DNA and RNA from the sample. Cell extracts were incubated with protein G Dynabeads (Invitrogen) bound to anti-Myc antibody (Roche, 9E10) for 2 h at 4°C. Finally, beads were washed 5 time in washing buffer (10mM Tris-Cl pH 7.5, 150mM NaCl, 0.5 % Triton) and unbound from the antibody by incubating at °C for 4 minutes in SR Buffer (2% SDS, 0.125 M Tris-Cl pH 6.8). Immunoprecipitated proteins were mixed with SS buffer (5% sacarose, 0.0125 % Bromophenol blue) and run in SDS-PAGE gel.
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6

Myc-tagged Protein Purification

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One-hundred and twenty OD600 of asynchronous cells were OD600 = 1 were collected and washed in cold water and resuspended in 200 μL of ice-cold buffer A (50 mM HEPES, 150 mM KCl, 1.5 mM MgCl2, 0.5 mM DTT, and 0.5% Triton X-100 [pH 7.5] supplemented with complete protease inhibitor cocktail tablets, Roche). Five-hundred mL of glass beads (425–600 μm) were added and cells lysed in a FastPrep FP120 cell disruptor (BIO101) by three repetitions of a 20 s cycle at power setting 5.5. Extracts were maintained on ice for 2 min after each cycle. Cell extracts were centrifuged for 10 min at 12,000 r.p.m. at 4°C and the supernatant incubated with protein G Dynabeads (Invitrogen) bound to anti-Myc antibody (Roche, 9E10) for 2 hr at 4°C. Finally, beads were washed five times in washing buffer (10 mM Tris-Cl pH 7.5, 150 mM NaCl, 0.5% Triton) and unbound from the antibody by incubating at 37°C for 4 min in SR buffer (2% SDS, 0.125 M Tris-Cl, pH 6.8). Immunoprecipitated proteins were mixed with SS buffer (5% saccharose, 0.0125% bromophenol blue) and run in an SDS-PAGE gel.
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7

Immunofluorescence Staining of Myc-GLUT1 Expressing Cells

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Immunofluorescence (IF) staining of cells was performed as previously described [32 ]. In brief, cells cultured on coverslips were washed with ice-cold PBS and fixed with methanol. Cells were permeabilized with PBS containing 0.2% Triton X-100. The cells expressing Myc-GLUT1 were incubated with anti-myc antibody (9E10, Roche) overnight followed by Alexa Fluor® 488-conjugated goat secondary antibody (Invitrogen) for 1 h. The coverslips were mounted in Vectashield (Vector Laboratories) and examined by a confocal laser-scanning microscope.
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8

Co-Immunoprecipitation Assay Protocol

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Co-IP assays were performed by transfecting HEK-293T cells with the indicated plasmids using lipofectamine™ 2000 (Invitrogen). After 48 hours, cells were harvested. Cell extracts were subjected to immunoprecipitation with either the anti-Myc antibody (1/2000, Roche, 11667149001), anti-His (1/2000, GenScript, A00174) or anti-Flag (1/2000, Agilent Technologies, 200472) antibody as indicated for overnight at 4°C. The antibody was coupled to protein A/G PLUS-Agrose (Santa Cruze, sc-2003). The immunoprecipitates were washed eight times with washing buffer and analyzed by SDS-PAGE and immunoblotting with antibody as indicated. For in vivo analysis, Nuclear extracts from E13.5 limb were immunoprecipitated with anti-Foxp1 antibody (Millipore, ABE68), anti-Foxp2 antibody (Abcam, ab16046) or IgG (Santa Cruze, sc-2027), and then blotted with anti-Foxp1 (1/1000, Millipore, ABE68), anti-Foxp2 (1/2000, Abcam, ab16046), anti-Foxp4 antibody (1/1000, Milipore, ABE74) and anti-Runx2 antibody (1/1000, Santa Cruze, sc-10758) as indicated.
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9

Rab39b Protein Expression in Cell Lines

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Two myc-tagged constructs encoding either wild type or mutant (p.G192R) RAB39B protein were created using the vector pcDNA 3.1/myc-His (Invitrogen Life Technologies, Carlsbad, CA). Rat pheochromocytoma (PC12) and human neuroblastoma (SK-N-BE(2)C) cells were grown and transfected with wild type or mutant constructs using either a retrovirus (pCL Vector System, Orbigen, San Diego, CA) for PC12 cells or Lipofectamine (Invitrogen) for SK-N-BE(2)C cells using previously described methods [21 (link)]. After 24 h the cells were lysed, and the lysates were subjected to 10 % sodium dodecyl sulfate-polyacrylamide gel electrophoresis and transferred to a polyvinylidene difluoride membrane (Bio-Rad Laboratories, Hercules, CA). The membranes were incubated with an anti-myc antibody (Roche Life Sciences, Branford, CT) and detection was achieved using the Novex ECL chemiluminescent substrate reagent kit (Invitrogen).
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10

Assessing cIAP1/2 Binding to RIP1

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To assess the impact of compounds on cIAP1 and cIAP2 binding to RIP1, 700,000 HEK293T cells were seeded into 100 mm cell-culture plates and transfected the next day with 6 μg of plasmid DNA, myc-RIP1 in pRK5 vector. After 24 h, cells were lysed in NP-40 buffer (20 mM Tris-HCl [pH 7.5], 135 mM NaCl, 1 mM EDTA, 0.5% NP-40, 10% glycerol) supplemented with EDTA-free protease inhibitors (Roche) and 1 mM DTT. Lysates from 6 plates were pooled and divided into equal 300 μL aliquots, into which 7 μg of purified GST-fusion proteins (GST-cIAP1-BIR3 or GST-cIAP2-BIR3) were added in the presence of various concentrations of SMAC mimetic compounds. The tubes were rocked overnight at 4°C, and the next day 20 μL of glutathione-Sepharose beads (GE Healthcare) was added to each tube and the tubes were rocked for an additional 2 h at 4°C. The GST-fusion proteins were recovered by centrifugation at 2,300 g for 30 sec, then washed 3-times in NP-40 lysis buffer. Finally, 20 μL of 2X Laemmli buffer was added and the samples were boiled, then fractionated by SDS-PAGE, followed by immunoblotting using anti-myc antibody (Roche) for detection of myc-RIP1 and anti-GST antibody (BD Biosciences, La Jolla, CA) for detection of GST-fusion proteins.
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