High-throughput sequencing for 1-METHYLADENOSINE (cas 15763-06-1) (m1A) mapping in RNA

Add time:09/05/2019    Source:sciencedirect.com

Detection and mapping of modified nucleotides in RNAs is a difficult and laborious task. Several physico-chemical approaches based on differential properties of modified nucleotides can be used, however, most of these methods do not allow high-throughput analysis. Here we describe in details a method for mapping of rather common 1-METHYLADENOSINE (cas 15763-06-1) (m1A) residues using high-throughput next generation sequencing (NGS). Since m1A residues block primer extension during reverse transcription (RT), the accumulation of abortive products as well as the nucleotide misincorporation can be detected in the sequencing data. The described library preparation protocol allows to capture both types of cDNA products essential for further bioinformatic analysis. We demonstrate that m1A residues produce characteristic arrest and mismatch rates and combination of both can be used for their detection as well as for discrimination of m1A from other modified A residues present in RNAs.

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