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Pathogens
Article . 2022 . Peer-reviewed
License: CC BY
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Pathogens
Article . 2022
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Host tRNA-Derived RNAs Target the 3′Untranslated Region of SARS-CoV-2

Authors: Emily N. Hendrickson; Marna E. Ericson; Lynne T. Bemis;

Host tRNA-Derived RNAs Target the 3′Untranslated Region of SARS-CoV-2

Abstract

The COVID-19 pandemic revealed a need for new understanding of the mechanisms regulating host–pathogen interactions during viral infection. Transfer RNA-derived RNAs (tDRs), previously called transfer RNA fragments (tRFs), have recently emerged as potential regulators of viral pathogenesis. Many predictive studies using bioinformatic approaches have been conducted providing a repertoire of potential small RNA candidates for further analyses; however, few targets have been validated to directly bind to SARS-CoV-2 sequences. In this study, we used available data sets to identify host tDR expression altered in response to SARS-CoV-2 infection. RNA-interaction-prediction tools were used to identify sequences in the SARS-CoV-2 genome where tDRs could potentially bind. We then developed luciferase assays to confirm direct regulation through a predicted region of SARS-CoV-2 by tDRs. We found that two tDRs were downregulated in both clinical and in vitro cell culture studies of SARS-CoV-2 infection. Binding sites for these two tDRs were present in the 3′ untranslated region (3′UTR) of the SARS-CoV-2 reference virus and both sites were altered in Variants of Concern (VOCs) that emerged later in the pandemic. These studies directly confirm the binding of human tDRs to a specific region of the 3′UTR of SARS-CoV-2 providing evidence for a novel mechanism for host–pathogen regulation.

Keywords

tRNA-derived RNAs, R, Medicine, tRF, host-viral interactions, tRNA fragments; tRF; tRNA-derived RNAs; tDR; small noncoding RNA; host-viral interactions; SARS-CoV-2; Variants of Concern; VOCs, tDR, small noncoding RNA, Article, tRNA fragments

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    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
Green
gold