Sample information curated by ChIP-Atlas

Antigen

Antigen Class
TFs and others
Antigen
RAD21

Cell type

Cell type Class
Blood
Cell type
Macrophages
MeSH Description
The relatively long-lived phagocytic cell of mammalian tissues that are derived from blood MONOCYTES. Main types are PERITONEAL MACROPHAGES; ALVEOLAR MACROPHAGES; HISTIOCYTES; KUPFFER CELLS of the liver; and OSTEOCLASTS. They may further differentiate within chronic inflammatory lesions to EPITHELIOID CELLS or may fuse to form FOREIGN BODY GIANT CELLS or LANGHANS GIANT CELLS. (from The Dictionary of Cell Biology, Lackie and Dow, 3rd ed.)

Attributes by original data submitter

Sample

source_name
monocyte derived macrophages (MDM)
cell type
monocyte derived macrophages (MDM)
treatment
IFNb treated (06h)
treatment time
06h
donor or replicate
3
electroporated mrna
none
sirna
none
chip antibody
RAD21, Genetex: GTX106012

Sequenced DNA Library

library_strategy
ChIP-Seq
library_source
GENOMIC
library_selection
ChIP
library_construction_protocol
RNAseq: Cells were lysed in Trizol (Thermo) and RNA was extracted either by adding chloroform, phase separation and isolating RNA from the upper phase using RNeasy columns with on-column DNase treatment or by using DirectZol kits (Zymo) with on-column DNase treatment, following the manufacturer's instructions. For cytoplasmic, nuclear, and large nuclear fraction RNA-seq (North-seq), RNA from 15 million live cells was isolated according to (Bhatt et al., 2012). Briefly, cells were washed with ice-cold PBS, resuspended at 75 million cells/ml final in cytoplasmic lysis buffer (0.15% NP-40, 10 mM Tris pH 7.5, 150 mM NaCl) and incubated on ice for 5 minutes. The lysate was layered onto 500 µl ice-cold sucrose buffer (10 mM Tris pH 7.5, 150 mM NaCl, 24% sucrose w/v) and centrifuged in microfuge tubes for 10 minutes at 13,000g, 4°C. The supernatant containing the cytoplasmic RNA (~ 700 µl) was transferred to a new tube, and the nuclear pellet was resuspended in 500 µl glycerol buffer (20 mM Tris pH 7.9, 75 mM NaCl, 0.5 mM EDTA, 50% glycerol, 0.85 mM DTT). RNA was extracted from the cytoplasmic and nuclear fraction with Trizol LS according to the manufacturer's instructions, DNase-treated with RQ1 DNase (Promega), extracted once with phenol:chloroform, once with chloroform, and ethanol-precipitated. For size selection of large nuclear RNAs, two micrograms nuclear RNA were denatured with an equal amount of 2x RNA loading dye (NEB, 47.5% formamide final) for 5 minutes at 70°C and separated on a 1.5% agarose/1x TBE gel for 30 minutes. After staining the RNA with 1x SYBR Gold in 1x TBE for 15 minutes, RNA above the 45S RNA band was excised with a scalpel blade and gel-extracted (Zymoclean Gel RNA Recovery, Zymo Research). Strand-specific total RNA-seq libraries from ribosomal RNA-depleted were prepared using the TruSeq kit (Illumina) according to the supplied protocol. ChIP-seq was essentially performed as described (Heinz et al., 2013), except that libraries were prepared using NEB Ultra II DNA library prep kit reagents. Start-seq was essentially performed as described (Scruggs et al., 2015) from total RNA with minor modifications, replacing phenol/chloroform extractions with Trizol LS (Thermo), using RppH (NEB) instead of tobacco acid pyrophosphatase, and generating sequencing libraries with a NEBNext Small RNA Library Prep kit (NEB). MethylC-seq libraries were prepared from ChIP input DNA that had been isolated as from formaldehyde-fixed samples as previously described (Heinz et al., 2013). Briefly, chromatin was sheared to an average size of 300 bp in ChIP lysis buffer, crosslinks reversed in 1% SDS/TE/300 mM NaCl ON at 65°C, treated for 30 minutes with 5 µg RNase A, digested for 2 h with 20 µg proteinase K and DNA was isolated with Speedbeads/PEG as described above. DNA libraries were made from 100 ng input DNA by adding methylated DNA sequencing adapters (Bioo) with NEB Ultra II DNA library prep kit reagents and cleaned up using Speedbeads/PEG/NaCl as above. Fifty nanograms of adapter-ligated DNA were bisulfite-treated using a Zymo EZ DNA methylation kit (Zymo Research) according to the manufacturer's instructions, and PCR-amplified using KAPA HiFi U+ ReadyMix and Solexa 1GA/1GB primers. In situ Hi-C was performed as described (Rao et al., 2014) with modifications. Cells were pelleted by centrifugation and resuspended and cross-linked in 1% formaldehyde/PBS for 10 minutes at room temperature (RT). After quenching the reaction by adding 1/20th volume of 2.625 M glycine, cells were pelleted by centrifugation and washed twice with ice-cold 0.5% BSA/PBS. Aliquots of 2 M cells each were snap-frozen and stored at -80°C. After thawing cells on ice, nuclei were isolated by resuspending the cell pellet in 200 µl wash buffer (50 mM Tris/HCl pH 7.5, 10 mM NaCl, 1 mM EDTA, 0.5% SDS, 1x protease inhibitor cocktail (Sigma P8340)). Nuclei were spun down at 2500g for 5 minutes at room temperature. Most of the supernatant was discarded, leaving the nuclei in 10 µl liquid. Samples were resuspended in Dpn II buffer, 195 µl water and rotated at 37°C for 15 minutes. Chromatin was digested overnight (ON) with 2 µl (100 U) Dpn II (NEB) at 37°C, rotating overhead with 8 RPM. The next day, Mbo I digests (not Dpn II digests) were inactivated by incubating for 20 minutes at 62°C, and nuclei were collected centrifugation (5 minutes, 500 g, RT). Two-hundred µl of the supernatant were discarded, leaving the nuclei in 50 µl liquid, and overhangs were filled in with Biotin-14-dATP by adding 50 µl Klenow Master Mix (31.95 µl water, 5 µl NEBuffer 2, 0.35 µl 10 mM dATP (or dCTP), 0.35 µl 10 mM dTTP, 0.35 µl 10 mM dGTP, 7.5 µl 0.4 mM Biotin-14-dCTP (or Biotin-14-dATP)(Thermo), 2 µl 10% Triton X-100, 2.5 µl (12.5 U) Klenow fragment (Enzymatics) and rotating overhead at RT, 8 RPM for 40 minutes. Reactions were stopped by adding 2.5 µl 0.5 M EDTA and placed on ice. Proximity ligation was performed by transferring the entire reaction into 1.5 ml Eppendorf tubes containing 400 µl ligase mix (320 µl water, 40 µl 10x T4 DNA ligase buffer (Enzymatics), 36 µl 10% Triton X-100, 0.5 µl 10 % BSA, 1 µl (600 U) T4 DNA ligase (HC, Enzymatics) and rotating ON at 16°C, 8 RPM. Reactions were stopped with 20 µl 0.5 M EDTA, treated with 1 µl 10 mg/ml DNase-free RNAse A for 15 minutes at 42°C, 33 µl 5 M NaCl and 55 µl 10 % SDS were added and crosslinks reversed for 4 h to ON at 65°C. Proteins were digested with 10 µl 20 mg/ml DNase-free proteinase K (Thermo) for 2 h at 55°C while shaking at 800 RPM, then 90 minutes at 65°C. After extraction with 600 µl ph 8-buffered phenol/chloroform/isoamyl alcohol (Ambion) followed by 300 µl chloroform, DNA was precipitated with 1.5 µl (22.5 µg) Glycoblue (Ambion) and 1400 µl 100% ethanol ON at -20°C, pelleted for 20' at 16000g, 4°C, washed twice with 80% ethanol, and the pellet air-dried and dissolved in 131 µl TT (0.05% Tween 20/Tris pH 8). DNA (800 ng) was sheared to 300 bp in 130 µl TT on a Covaris M220 or S220, using the manufacturer's protocol. DNA was then directly bound to streptavidin-coated Dynabeads. Biotinylated DNA captured on Dynabeads MyOne Streptavidin T1 (Thermo) by combining the sample (50 µl or 130 µl) with 20 µl Dynabeads that had previously been washed once with 1x B&W buffer (2X B&W: 10 mM Tris-HCl pH=7.5, 1 mM EDTA, 2 M NaCl), and had been resuspended in 50 µl or 130 µl 2x B&W containing 0.2% Tween 20. The binding reaction was rotated at RT for 30 minutes, and DNA-bound beads were washed once with 1 ml 1x B&W/0.1% Triton-X 100, once with TET (0.2% Tween 20, 10 mM Tris pH 8, 1 mM EDTA). Beads were resuspended in 100 µl Blunting Mix (74.5 µl water, 0.5 µl 10% Tween 20, 10 µl 10x T4 DNA ligase buffer (Enzymatics), 4 µl 10 mM dNTP, 2 µl (6 U) T4 DNA polymerase (Enzymatics), 0.4 µl (2 U) Klenow fragment (Enzymatics), 2 µl (20 U) T4 polynucleotide kinase (Enzymatics)) and incubated for 30 minutes at 20°C. Reactions were stopped by adding 2.5 µl 0.5 M EDTA, beads collected on a magnet and washed twice with 150 µl 1x B&W/0.1% Triton-X 100, once with 180 µl TET. Beads were resuspended in 50 µl A-tail Mix (44.25 µl water, 0.5 µl 10% Tween 20, 5 µl NEBuffer 2, 0.2 µl 100 mM dATP, 0.3 µl (15 U) Exo--Klenow (Enzymatics) and incubated for 30 minutes at 37°C. Reactions were stopped by adding 1.5 µl 0.5 M EDTA, beads collected on a magnet and the SN was discarded. Beads were resuspended on ice in 48 µl ice-cold Ligation mix (25 µl 2x T4 DNA ligation buffer (Enzymatics), 0.5 µl 10% Tween 20, 22.5 µl water), 2 µl 0.6 µM Bioo Nextflex DNA sequencing adapters were added, and the reaction incubated for 20 minutes at RT. Reactions were stopped by adding 5 µl 0.5 M EDTA, and beads were washed twice with 1x B&W/0.1% Triton-X 100, once with TET and resuspended in 30 µl 0.05% Tween 20/LoTE (TE dilute 1:4 with water). Libraries were amplified by PCR for 10 or 12 cycles (98°C, 30s; 10

Sequencing Platform

instrument_model
NextSeq 500

hg19

Number of total reads
14031841
Reads aligned (%)
76.1
Duplicates removed (%)
20.0
Number of peaks
26662 (qval < 1E-05)

hg38

Number of total reads
14031841
Reads aligned (%)
77.4
Duplicates removed (%)
19.4
Number of peaks
26743 (qval < 1E-05)

Base call quality data from DBCLS SRA