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GNPS Purified Recombinant His-HvGKEc Band in Gel

ABSTRACT: Recombinant H. volcanii Glycerol Kinase expressed in E.coli BL21 DE3 (HvGKEc) using the plasmid pET15b+glpK in LB Amp. The protein was initially eluted in 50mM HEPES buffer, 2M NaCl. The sample was resuspended in 2X laemmli sample buffer and run in the SDS gel using 1X SDS buffer. The sampled was fixed, the gel was stained with bio-safe commassie overnight, and the band was analyzed.

INSTRUMENT(S): Q Exactive HF Orbitrap

ORGANISM(S): Haloferax Volcanii Ds2 (ncbitaxon:309800) Escherichia Coli Bl21(de3) (ncbitaxon:469008)

SUBMITTER: Julie A. Maupin-Furlow

PROVIDER: MSV000097933 | GNPS | Tue May 20 06:50:00 BST 2025

SECONDARY ACCESSION(S): PXD064105

REPOSITORIES: GNPS

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Project description:Glioblastoma stem cells (TS-543) were harvested and cross-linked with 1% formaldehyde for 10 mins at room temperature. The cells were lysed using SDS Lysis buffer for ChIP (1% SDS, 10 mM EDTA, 50 mM Tris-HCl pH 8). The lysate was then sonicated for 25 cycles at 30% amplitude (15 s ON and 45 s OFF). The sonicated samples were then diluted in ChIP dilution buffer (0.01% SDS, 1% Triton-X-100, 1.2 mM EDTA, 16.7 mM Tris–HCl pH 8, 167 mM NaCl) and used for the immunoprecipitation with H3K27ac (Abcam, Ab4729), H2AZ (Active motive, cat#39113) and H3K27ac (Abcam cat#ab8580). After an over-night incubation with antibody, the bound DNA was washed sequentially with low salt wash buffer (0.1% SDS, 1% Triton X 100, 2 mM EDTA, 20 mM Tris–HCl pH 8, 150 mM NaCl), high salt wash buffer (0.1% SDS, 1% Triton X-100, 2 mM EDTA, 20 mM Tris–HCl pH 8, 500 mM NaCl), LiCl wash buffer (0.25 M LiCl, 1% NP40, 1%deoxycholate, 1 mM EDTA, 10 mM Tris–HCl pH 8) and TE wash buffer (10 mM Tris–HCl pH 8, 1 mM EDTA) to remove non-specific sequences and eluted in the elution buffer (84 mg NaHCO3, 1 ml 10% SDS, 9 ml H2O). Then the samples were reverse cross-linked using NaCl at 65°C overnight. The eluted DNA was purified and used for library preparation. Library preparation was performed as previously described as described in Bowman et al. BMC Genomics 2013. Briefly, end repair with NEBNext End Repair enzyme (NEB, E6050) and clean-up with 2.4x volume AMPure XP beads (Beckman Coulter, A63880). A-tailing with Klenow Fragment (NEB, M0212) and purified with 2.4x volume AMPure XP beads. Adapter ligation reactions contained annealed universal adapter and T4 rapid ligase (NEB, B0202) and clean-up with 1.8x volume AMPure XP beads. Chromatin was amplified using KAPA Real-time Library Amplification Kit (KAPABIOSYSTEMS, KK2701) with universal primer and barcoded primer. Amplified chromatin was purified with QIAquick Gel Extraction Kit (Qiagen) and sequenced paired-end with Illumina NextSeq 500.

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GNPS Purified Recombinant His-HvGKEc Band in Gel

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