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Plant Small RNA World Growing Bigger: tRNA-Derived Fragments, Longstanding Players in Regulatory Processes

In the past 2 decades, the discovery of a new class of small RNAs, known as tRNA-derived fragments (tRFs), shed light on a new layer of regulation implicated in many biological processes. tRFs originate from mature tRNAs and are classified according to the tRNA regions that they derive from, namely...

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Autores principales: Alves, Cristiane S., Nogueira, Fabio T. S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8215267/
https://www.ncbi.nlm.nih.gov/pubmed/34164429
http://dx.doi.org/10.3389/fmolb.2021.638911
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author Alves, Cristiane S.
Nogueira, Fabio T. S.
author_facet Alves, Cristiane S.
Nogueira, Fabio T. S.
author_sort Alves, Cristiane S.
collection PubMed
description In the past 2 decades, the discovery of a new class of small RNAs, known as tRNA-derived fragments (tRFs), shed light on a new layer of regulation implicated in many biological processes. tRFs originate from mature tRNAs and are classified according to the tRNA regions that they derive from, namely 3′tRF, 5′tRF, and tRF-halves. Additionally, another tRF subgroup deriving from tRNA precursors has been reported, the 3′U tRFs. tRF length ranges from 17 to 26 nt for the 3′and 5′tRFs, and from 30 to 40 nt for tRF-halves. tRF biogenesis is still not yet elucidated, although there is strong evidence that Dicer (and DICER-LIKE) proteins, as well as other RNases such as Angiogenin in mammal and RNS proteins family in plants, are responsible for processing specific tRFs. In plants, the abundance of those molecules varies among tissues, developmental stages, and environmental conditions. More recently, several studies have contributed to elucidate the role that these intriguing molecules may play in all organisms. Among the recent discoveries, tRFs were found to be involved in distinctive regulatory layers, such as transcription and translation regulation, RNA degradation, ribosome biogenesis, stress response, regulatory signaling in plant nodulation, and genome protection against transposable elements. Although tRF biology is still poorly understood, the field has blossomed in the past few years, and this review summarizes the most recent developments in the tRF field in plants.
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spelling pubmed-82152672021-06-22 Plant Small RNA World Growing Bigger: tRNA-Derived Fragments, Longstanding Players in Regulatory Processes Alves, Cristiane S. Nogueira, Fabio T. S. Front Mol Biosci Molecular Biosciences In the past 2 decades, the discovery of a new class of small RNAs, known as tRNA-derived fragments (tRFs), shed light on a new layer of regulation implicated in many biological processes. tRFs originate from mature tRNAs and are classified according to the tRNA regions that they derive from, namely 3′tRF, 5′tRF, and tRF-halves. Additionally, another tRF subgroup deriving from tRNA precursors has been reported, the 3′U tRFs. tRF length ranges from 17 to 26 nt for the 3′and 5′tRFs, and from 30 to 40 nt for tRF-halves. tRF biogenesis is still not yet elucidated, although there is strong evidence that Dicer (and DICER-LIKE) proteins, as well as other RNases such as Angiogenin in mammal and RNS proteins family in plants, are responsible for processing specific tRFs. In plants, the abundance of those molecules varies among tissues, developmental stages, and environmental conditions. More recently, several studies have contributed to elucidate the role that these intriguing molecules may play in all organisms. Among the recent discoveries, tRFs were found to be involved in distinctive regulatory layers, such as transcription and translation regulation, RNA degradation, ribosome biogenesis, stress response, regulatory signaling in plant nodulation, and genome protection against transposable elements. Although tRF biology is still poorly understood, the field has blossomed in the past few years, and this review summarizes the most recent developments in the tRF field in plants. Frontiers Media S.A. 2021-06-07 /pmc/articles/PMC8215267/ /pubmed/34164429 http://dx.doi.org/10.3389/fmolb.2021.638911 Text en Copyright © 2021 Alves and Nogueira. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Molecular Biosciences
Alves, Cristiane S.
Nogueira, Fabio T. S.
Plant Small RNA World Growing Bigger: tRNA-Derived Fragments, Longstanding Players in Regulatory Processes
title Plant Small RNA World Growing Bigger: tRNA-Derived Fragments, Longstanding Players in Regulatory Processes
title_full Plant Small RNA World Growing Bigger: tRNA-Derived Fragments, Longstanding Players in Regulatory Processes
title_fullStr Plant Small RNA World Growing Bigger: tRNA-Derived Fragments, Longstanding Players in Regulatory Processes
title_full_unstemmed Plant Small RNA World Growing Bigger: tRNA-Derived Fragments, Longstanding Players in Regulatory Processes
title_short Plant Small RNA World Growing Bigger: tRNA-Derived Fragments, Longstanding Players in Regulatory Processes
title_sort plant small rna world growing bigger: trna-derived fragments, longstanding players in regulatory processes
topic Molecular Biosciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8215267/
https://www.ncbi.nlm.nih.gov/pubmed/34164429
http://dx.doi.org/10.3389/fmolb.2021.638911
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