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Critical evaluation of the Illumina MethylationEPIC BeadChip microarray for whole-genome DNA methylation profiling [MethylationEPIC]

GSE86831 Homo sapiens (human) DNA methylation 15 samples Submitted 2016/09/12 Platform GPL21145
At a glance

DNA methylation · human · 15 samples

What it is
DNA methylationChemical marks on DNA that help switch genes on or off.
Organism
Homo sapiens (human)
Samples
15 samples: 5 × Guthrie T vs 2 × LNCaP vs 2 × PrECGroups are read from the sample names, not from the paper. Check the list below.
Data you can get
A processed table (series matrix) and supplementary files from NCBI.
Summary (written by the submitters)
We performed a critical evaluation of the new Infinium MethylationEPIC BeadChip microarray. EPIC covers over 850,000 CpG sites, including >90% of the CpGs from the HumanMethylation450 (HM450) BeadChip and an additional 413,743 CpGs. Even though the additional probes improve the coverage of regulatory elements, including 58% of FANTOM5 enhancers, only 7% distal and 27% proximal ENCODE regulatory elements are represented.
Read the full summary ↓
Detailed comparisons of regulatory elements from EPIC and whole-genome bisulphite sequencing data (WGBS) show that a single EPIC probe is not always informative for those distal regulatory elements showing variable methylation across the region. However, overall data from the EPIC array at single loci are highly reproducible across technical and biological replicates and demonstrate high correlation with HM450 and WGBS data. We show that the HM450 and EPIC arrays distinguish differentially methylated probes, but the absolute agreement depends on the threshold set for each platform.
This dataset
Download · which file do I need?

Direct links to NCBI, no account and no request form. Pick by what you want to do: take the small processed table to look, the supplementary files to re-analyse, or the original raw data to start over.

1 · Just have a look

Processed table

The series matrix: one table of values per sample as the submitters processed it. The smallest download, and it opens in Excel or R. Start here to see what the data look like.

2 · Re-analyse it

Supplementary files

The count tables and other files the authors uploaded. Take only the samples you need.

All supplementary files ↗
3 · The original raw files

Whole study · RAW.tar

Everything the authors deposited as one archive (GSE86831_RAW.tar), including the raw array or instrument files. Can be large; the picker in step 2 takes just the samples you need.

What the files usually look like: Look for beta-value tables or raw IDAT files among the supplementary files.

Also filed as BioProject PRJNA342658. Searching any of these in the dataset finder brings you back here.

Study design
5 × Guthrie T vs 2 × LNCaP vs 2 × PrEC

Supports a between-group comparison across 9 samples.

How we read this: 3 replicated groups read from 15 sample titles; they account for 9 of them. These groups are guessed from the sample names, not taken from the paper, so check them against the sample list below before relying on them.

Samples in this study
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