In lysate RNA digestion provides insights into the angiogenin’s specificity towards transfer RNAs

Yasutoshi Akiyama, Yoshihisa Tomioka, Takaaki Abe, Paul Anderson, Pavel Ivanov

研究成果: Article査読

抄録

Under adverse conditions, tRNAs are processed into fragments called tRNA-derived stress-induced RNAs (tiRNAs) by stress-responsive ribonucleases (RNases) such as angiogenin (ANG). Recent studies have reported several biological functions of synthetic tiRNAs lacking post-transcriptional modifications found on endogenous tiRNAs. Here we describe a simple and reproducible method to efficiently isolate ANG-cleaved tiRNAs from endogenous tRNAs. Using this in vitro method, more than 50% of mature tRNAs are cleaved into tiRNAs which can be enriched using complementary oligonucleotides. Using this method, the yield of isolated endogenous 5ʹ-tiRNAGly-GCC was increased about fivefold compared to when tiRNAs were obtained by cellular treatment of ANG. Although the non-specific ribonuclease activity of ANG is much lower than that of RNase A, we show that ANG cleaves physiologically folded tRNAs as efficiently as bovine RNase A. These results suggest that ANG is highly specialized to cleave physiologically folded tRNAs. Our method will greatly facilitate the analysis of endogenous tiRNAs to elucidate the physiological functions of ANG.

本文言語English
ジャーナルRNA Biology
DOI
出版ステータスAccepted/In press - 2021

ASJC Scopus subject areas

  • 分子生物学
  • 細胞生物学

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