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Annual Review of Microbiology

Volume 74, 2020

The Bacterial Ro60 Protein and Its Noncoding Y RNA Regulators

Abstract

Ro60 ribonucleoproteins (RNPs), composed of the ring-shaped Ro 60-kDa (Ro60) protein and noncoding RNAs called Y RNAs, are present in all three domains of life. Ro60 was first described as an autoantigen in patients with rheumatic disease, and Ro60 orthologs have been identified in 3% to 5% of bacterial genomes, spanning the majority of phyla. Their functions have been characterized primarily in , the first sequenced bacterium with a recognizable ortholog. In , the Ro60 ortholog enhances the ability of 3′-to-5′ exoribonucleases to degrade structured RNA during several forms of environmental stress. Y RNAs are regulators that inhibit or allow the interactions of Ro60 with other proteins and RNAs. Studies of Ro60 RNPs in other bacteria hint at additional functions, since the most conserved Y RNA contains a domain that is a close tRNA mimic and Ro60 RNPs are often encoded adjacent to components of RNA repair systems.

Keyword(s): exoribonucleases, noncoding RNAs, polynucleotide phosphorylase, ribonucleoproteins, RNA degradation, tRNA mimic
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2020-09-08
2024-04-24
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/content/journals/10.1146/annurev-micro-020620-062812
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The Bacterial Ro60 Protein and Its Noncoding Y RNA Regulators
Annual Review of Microbiology 74, 387 (2020); https://doi.org/10.1146/annurev-micro-020620-062812
/content/journals/10.1146/annurev-micro-020620-062812
/content/journals/10.1146/annurev-micro-020620-062812
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