High-resolution quantitative profiling of tRNA abundance and modification status in eukaryotes by mim-tRNAseq.

Andrew Behrens, Geraldine Rodschinka, Danny D Nedialkova

Molecular cell 2021 Apr 15

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Measurements of cellular tRNA abundance are hampered by pervasive blocks to cDNA synthesis at modified nucleosides and the extensive similarity among tRNA genes. We overcome these limitations with modification-induced misincorporation tRNA sequencing (mim-tRNAseq), which combines a workflow for full-length cDNA library construction from endogenously modified tRNA with a comprehensive and user-friendly computational analysis toolkit. Our method accurately captures tRNA abundance and modification status in yeast, fly, and human cells and is applicable to any organism with a known genome. We applied mim-tRNAseq to discover a dramatic heterogeneity of tRNA isodecoder pools among diverse human cell lines and a surprising interdependence of modifications at distinct sites within the same tRNA transcript. Copyright © 2021 The Author(s). Published by Elsevier Inc. All rights reserved.

Citation

Andrew Behrens, Geraldine Rodschinka, Danny D Nedialkova. High-resolution quantitative profiling of tRNA abundance and modification status in eukaryotes by mim-tRNAseq. Molecular cell. 2021 Apr 15;81(8):1802-1815.e7