Presented at London Calling 2016

Included in methylation, nanopore themes

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Author: Jared T Simpson
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Detecting DNA Methylation using the Oxford Nanopore Technologies MinION sequencer


Created on 4th April 2016

Jared T Simpson; Rachael Workman; Philip C Zuzarte; Matei David; Lewis Jonathan Dursi; Winston Timp;


Nanopore sequencing instruments measure the change in electric current caused by DNA transiting through the pore. In experimental and prototype nanopore sequencing devices it has been shown that the electrolytic current signals are sensitive to base modifications, such as 5-methylcytosine. Here we quantify the strength of this effect for the Oxford Nanopore Technologies MinION sequencer. Using synthetically methylated DNA we are able to train a hidden Markov model to distinguish 5-methylcytosine from unmethylated cytosine in DNA. We demonstrate by sequencing natural human DNA, without any special library preparation, that global patterns of methylation can be detected from low-coverage sequencing and that the methylation status of CpG islands can be reliably predicted from single MinION reads. Our trained model and prediction software is open source and freely available to the community under the MIT license.

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