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Title: Transcription-wide mapping of dihydrouridine reveals that mRNA dihydrouridylation is required for meiotic chromosome segregation.

Authors: Finet, Olivier; Yague-Sanz, Carlo; Krüger, Lara Katharina; Tran, Phong; Migeot, Valérie; Louski, Max; Nevers, Alicia; Rougemaille, Mathieu; Sun, Jingjing; Ernst, Felix G M; Wacheul, Ludivine; Wery, Maxime; Morillon, Antonin; Dedon, Peter; Lafontaine, Denis L J; Hermand, Damien

Published In Mol Cell, (2022 Jan 20)

Abstract: The epitranscriptome has emerged as a new fundamental layer of control of gene expression. Nevertheless, the determination of the transcriptome-wide occupancy and function of RNA modifications remains challenging. Here we have developed Rho-seq, an integrated pipeline detecting a range of modifications through differential modification-dependent rhodamine labeling. Using Rho-seq, we confirm that the reduction of uridine to dihydrouridine (D) by the Dus reductase enzymes targets tRNAs in E. coli and fission yeast. We find that the D modification is also present on fission yeast mRNAs, particularly those encoding cytoskeleton-related proteins, which is supported by large-scale proteome analyses and ribosome profiling. We show that the α-tubulin encoding mRNA nda2 undergoes Dus3-dependent dihydrouridylation, which affects its translation. The absence of the modification on nda2 mRNA strongly impacts meiotic chromosome segregation, resulting in low gamete viability. Applying Rho-seq to human cells revealed that tubulin mRNA dihydrouridylation is evolutionarily conserved.

PubMed ID: 34798057 Exiting the NIEHS site

MeSH Terms: No MeSH terms associated with this publication

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