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NAD tagSeq reveals that NAD+-capped RNAs are mostly produced from a large number of protein-coding genes in Arabidopsis


Date: 29th May 2019 | Source: PNAS

Authors: Hailei Zhang, Huan Zhong, Shoudong Zhang, Xiaojian Shao, Min Ni, Zongwei Cai, Xuemei Chen, Yiji Xia.

The 5′ end of a eukaryotic messenger RNA generally contains an 7-methylguanosine (m7G) cap, which has an essential role in regulating gene expression. Recent discoveries of RNAs with a noncanonical NAD+ moiety indicate the existence of a previously unknown mechanism for controlling gene expression. We have developed a method termed NAD tagSeq for the accurate identification and quantification of NAD+-capped RNAs and for revealing the complete sequences of NAD-RNAs using single-molecule RNA sequencing. Using this method, we found that NAD-RNAs in Arabidopsis were mostly derived from protein-coding genes and that they have essentially the same overall sequence structures as the canonical m7G-RNAs. The identification of NAD-RNAs and their sequence structures facilitates the elucidation of their possible molecular and physiological functions.

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