Our MeDIP-sequencing service provides our customers with the methylation profile throughout the entire genome, the “Methylome” of their samples. The resulting data allows our customers to screen for “Differentially Methylated Regions” in a genome-wide approach for the specific disorder, event or phenotype they are studying.

MeDIP-seq combines methylated DNA immunoprecipitation ((h)MeDIP) with massively-parallel DNA sequencing.  It involves antibodies directed against mC/mCG to precipitate methylated DNA fragments. MeDIP is able to detect methylated cytosines in both mC and mCG contexts. hMeDIP-seq on the other hand allows to detect 5hmC or hydroxymethylation in your samples. Combining (h)MeDIP with next generation sequencing provides high-quality methylomes at typically 100-300bp resolution at costs comparable to other capture-based techniques.

Highlights of this service:

-          True genome-wide

-          Focus on less-densily methylated regions

-          Approximate basepair resolution

-          >95% of genome-wide BSS data is also found with this service

-          Applicable to all mammalian samples and tissue types

 

MeDIP-sequencing-workflow

 

The Workflow:

The process consists of several steps.

We start the process with performing a first quality control step in which we measure the quantity and quality of the DNA provided to us by our customers. Only when the provided genomic DNA is of sufficient quality and quantity will we proceed with the next steps. In case the DNA provided to us is of insufficient quality and/or quantity, we will contact the customer and discuss how to proceed.

In a second step we perform a random fragmentation of the genomic DNA samples followed by size selection of the resulting fragments. This is followed by a second quality control step in which the resulting DNA concentration is determined and the DNA is checked for degradation.

The resulting DNA fragments will then be separated by performing 5mC or 5hmC immunoprecipitation. Only fragments containing 5mC or 5hmC are withheld, while fragments that do not contain methylation are discarded. Once again the DNA concentration will be determined during as a quality control step.

The library preparation and sequencing are then performed using Illumina sequencing technology.

Upon completion of the sequencing run the bio-informatics part of the service is started by performing basecalling, cleaning and mapping of the data. Afterwards the data is uploaded into our Genome Browser software. Customers get access to the data files for their samples together with access codes to the Genome Browser software in which they can analyze their data in an intuitive and easy-to-use software environment.