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SRX21078835: GSM7647074: CTCF_d80_170_adult_HA_1; Drosophila melanogaster; ChIP-Seq
1 ILLUMINA (Illumina NovaSeq 6000) run: 30.2M spots, 6G bases, 1.9Gb downloads

External Id: GSM7647074_r1
Submitted by: Institute of Gene Biology (IGB) of the Russian Academy of Sciences
Study: The N-terminal dimerization domains of human and Drosophila CTCF have similar functionality
show Abstracthide Abstract
CTCF is the main architectural protein found in the majority of examined bilaterians. CTCFs of various organisms contain unstructured N-terminal dimerization domain (DD) along with clusters consisting of eleven zinc-finger domains of C2H2 type. The Drosophila (dCTCF) and human (hCTCF) CTCF share sequence homology only in five C2H2 domains that specifically bind to conserved 15 bp motif. By using CTCFattP(mCh) platform to introduce desired changes in the Drosophila CTCF gene, we generated a series of transgenic lines expressing dCTCF with different variants of the N-terminal domain. Our findings revealed that the functionality of dCTCF is significantly affected solely by the deletion of the N-terminal DD. Also, we observed a strong impact on the binding of the dCTCF mutant to chromatin upon deletion of the DD. However, chromatin binding was restored in transgenic flies expressing a chimeric CTCF protein with the DD of hCTCF. Although the chimeric protein exhibited lower expression level compared to the dCTCF variants, it efficiently bound to chromatin similar to the wild type (wt) protein. Our results suggest that one of the evolutionarily conserved function of the unstructured dimerization domain is to recruit dCTCF to its binding sites in vivo. Overall design: ChIP-seq signal of the dCTCF and CP190 proteins occupancy in dCTCFwt-HA, dCTCF?80-170-HA, dCTCF?132-170-HA and dCTCFhN lines. Please note that processed data file generated from both replicates is linked to the corresponding *_1 sample records.
Sample: CTCF_d80_170_adult_HA_1
SAMN36616791 • SRS18348381 • All experiments • All runs
Library:
Name: GSM7647074
Instrument: Illumina NovaSeq 6000
Strategy: ChIP-Seq
Source: GENOMIC
Selection: ChIP
Layout: PAIRED
Construction protocol: After 3 rounds of washing with lysis buffer supplemented with 500 mM NaCl, and TE buffer (10 mM Tris-HCl, pH 8; 1 mM EDTA), the DNA was eluted with elution buffer (50 mM Tris-HCl, pH 8.0; 1 mM EDTA, 1% SDS), the cross-links were reversed, and the precipitated DNA was extracted by the ChIP DNA Clean &Concentrator kit (Zymoresearch). Libraries were prepared according to manufacturers recommendations with small modifications. In short, 1-10ng of purified, RNase treated, and reverse cross-linked genomic DNA was end-repaired and terminal adenosine residues were added using the NEBNext reagents. Custom-made indexed adapters were ligated, after which the material was size selected at ~200-600 bp with Ampure XP beads (Beckman Coulter). PCR amplification was performed using PE1.0 and PE2.0 primers (custom-made) for 12 cycles for Input samples and 14 to 15 cycles for IP-ed samples using the Q5 Hot Start HiFi PCR Master Mix (NEB). The PCR-amplified library was purified using Ampure XP beads and its quality was assessed on a Bioanalyzer 2100 system (Agilent). The libraries were sequenced on aNovaSeq 6000 (Illumina) in pair-end mode.
Runs: 1 run, 30.2M spots, 6G bases, 1.9Gb
Run# of Spots# of BasesSizePublished
SRR2533937730,175,0466G1.9Gb2024-04-17

ID:
28513618

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