Precise Antibody-Independent m6A Identification via 4SedTTP-Involved and FTO-Assisted Strategy at Single-Nucleotide Resolution

Journal of the American Chemical Society
Tingting HongXiang Zhou

Abstract

Innovative detection techniques to achieve precise m6A distribution within mammalian transcriptome can advance our understanding of its biological functions. We specifically introduced the atom-specific replacement of oxygen with progressively larger atoms (sulfur and selenium) at 4-position of deoxythymidine triphosphate to weaken its ability to base pair with m6A, while maintaining A-T* base pair virtually the same as the natural one. 4SedTTP turned out to be an outstanding candidate that endowed m6A with a specific signature of RT truncation, thereby making this "RT-silent" modification detectable with the assistance of m6A demethylase FTO through next-generation sequencing. This antibody-independent, 4SedTTP-involved and FTO-assisted strategy is applicable in m6A identification, even for two closely gathered m6A sites, within an unknown region at single-nucleotide resolution.

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