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Sample GSM5216634 Query DataSets for GSM5216634
Status Public on Apr 13, 2022
Title KG1a_Alu_pool_cell_90 [i508_H6_i706_KG1a_Alu]
Sample type SRA
Source name KG1a_cell_line
Organism Homo sapiens
Characteristics treatment: decitabine treated: at 0, 24 and 48 hours, harvested at 72 hours
cancer type: Acute myeloid leukemia
Sex: M
age: 59
molecule subtype: genomic DNA, bisulfate treated
Treatment protocol Cell lines were treated with 100nM decitabine every 24 hours (0, 24 and 48 hours) and harvested at 72 hours
Growth protocol KG1a cells were resuspended in binding buffer before staining with annexin V and 7-AAD. Live cells (Annexin V - /7-AAD -) were sorted into individual wells of a 96 well plate containing lysis buffer 2.5μL RLT Plus Lysis Buffer (QIAGEN, catalog # 1053393) containing 1U/μL SUPERase-In (ThermoFisher, catalog # AM2696) in 96 well plates. Before sorting, bulk samples of 1000000 cells were collected from both the untreated and treated populations.
Extracted molecule genomic DNA
Extraction protocol We utilised the G&T-seq protocol to separate genomic DNA and RNA from the single-cell samples [Macaulay, I.C., et al., G&T-seq: parallel sequencing of single-cell genomes and transcriptomes. Nature Methods, 2015.]. Genomic DNA from each cell was purified and bisulphite conversion was performed as described [Angermueller, C., et al., Parallel single-cell sequencing links transcriptional and epigenetic heterogeneity. Nature methods, 2016], with minor modifications.
Bisulphite conversion was carried out using the EZ-96 DNA Methylation-Direct MagPrep Kit (Integrated Sciences, catalog # D5054) with half volumes of the manufacturer’s instructions. Bisulphite converted DNA was eluted directly from MagBeads into PCR-mix, and amplification of TEs was performed with MagBeads still in the well. PCR cycling conditions used were 95°C for 5 min (1 cycle), 98°C for 20 sec, 53°C for 15 sec, 72°C for 1 min (35 cycles), and 72°C for 10min (1 cycle). PCR mix used 7.5µl 1x KAPA HiFi hotStart Uracil + ReadyMix (Millennium, catalog # ROC-07959079001) and 0.3µM primer mix. Primers were designed against SINE Alu and LINE-1 consensus sequences (Supplementary Figure S2A) and are contained in Supplementary Tables S1 and S2. After amplification, plates of 96 single cell libraries purified using a 1.2x volume of AMPure XP beads (Beckman Coulter, catalog # A63881). All libraries were then quantified using the Qubit dsDNA HS kit (Life Technologies), normalised and pooled to a single tube. Pools where then added to 0.8µM NEBNext dual index oligo sets (Genesearch, catalog # E7780S) and 14.5µl 1x KAPA HiFi HotStart ReadyMix (Millennium, catalog # ROC-07958935001) for indexing and adaptor addition. PCR cycling conditions used were 98°C for 45 sec (1 cycle), 98°C for 15 sec, 65°C for 30 sec, 72°C for 30 sec (5 cycles), and 72°C for 5 min (1 cycle). Pools were then purified using 0.9x volume of Ampure XP beads, normalised and combined for sequencing.
Library strategy Bisulfite-Seq
Library source genomic
Library selection RANDOM
Instrument model Illumina MiSeq
Data processing library strategy: single-cell transposable element methylation sequencing (scTEM-seq)
After initial demultiplexing of primary Illumina indexes, Cutadapt (v2.10) [18] was used to demultiplex pools based on custom secondary indexes
Commands –g and -G were used to pass named forward and reverse index lists as a .fasta file to Cutadapt for demultiplexing
Bisulfite reads were trimmed using Trim Galore (v0.6.5). 10bp was trimmed from both the 5’ and 3’ ends to remove oligo sequences from reads.
Reads were mapped to Bowtie2 (v 2.4.1) indexed human genome (GRCh38) non-directionally and as paired end using Bismark (v0.22.3)
The methylation extraction module from Bismark was then used to produce coverage files (.cov) for methylation analysis. We excluded cells with coverage of less than 1000 annotated TE sites.
Downstream analysis was performed using Seqmonk and custom R scripts
Genome_build: GRCh38
Supplementary_files_format_and_content: The genome-wide CpG methylation reports (.cov files) are tab-delimited, use 1-based genomic coordinates and are in the following format: <chromosome> <position> <methylation rate>
Submission date Mar 29, 2021
Last update date Apr 13, 2022
Contact name Heather Lee
Organization name The University of Newcastle
Street address University Drive, Callaghan
City Newcastle
State/province NSW
ZIP/Postal code 2308
Country Australia
Platform ID GPL15520
Series (2)
GSE171025 SINEultaneous profiling of epigenetic heterogeneity and transcriptome in single cells [KG1a DAC scTEM-seq]
GSE171029 SINEultaneous profiling of epigenetic heterogeneity and transcriptome in single cells
BioSample SAMN18524467
SRA SRX10465504

Supplementary file Size Download File type/resource
GSM5216634_i508_H6_i706_KG1a_Alu_CpG-meth_processed.cov.gz 68.8 Kb (ftp)(http) COV
SRA Run SelectorHelp
Raw data are available in SRA
Processed data provided as supplementary file

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