Structural features within the NORAD long noncoding RNA underlie efficient repression of Pumilio activity.
Journal
Nature structural & molecular biology
ISSN: 1545-9985
Titre abrégé: Nat Struct Mol Biol
Pays: United States
ID NLM: 101186374
Informations de publication
Date de publication:
26 Sep 2024
26 Sep 2024
Historique:
received:
18
10
2022
accepted:
27
08
2024
medline:
27
9
2024
pubmed:
27
9
2024
entrez:
26
9
2024
Statut:
aheadofprint
Résumé
Long noncoding RNAs (lncRNAs) are increasingly appreciated for their important functions in mammalian cells. However, how their functional capacities are encoded in their sequences and manifested in their structures remains largely unknown. Some lncRNAs bind to and modulate the availability of RNA-binding proteins, but the structural principles that underlie this mode of regulation are unknown. The NORAD lncRNA is a known decoy for Pumilio proteins, which modulate the translation and stability of hundreds of messenger RNAs and, consequently, a regulator of genomic stability and aging. Here we probed the RNA structure and long-range RNA-RNA interactions formed by human NORAD inside cells under different stressful conditions. We discovered a highly modular structure consisting of well-defined domains that contribute independently to NORAD function. Following arsenite stress, most structural domains undergo relaxation and form interactions with other RNAs that are targeted to stress granules. We further revealed a unique structural organization that spatially clusters the multiple Pumilio binding sites along NORAD and consequently contributes to the derepression of Pumilio targets. We then applied these structural principles to design an effective artificial decoy for the let-7 microRNA. Our work demonstrates how the sequence of a lncRNA spatially clusters its function into separated domains and how structural principles can be employed for the rational design of lncRNAs with desired activities.
Identifiants
pubmed: 39327473
doi: 10.1038/s41594-024-01393-5
pii: 10.1038/s41594-024-01393-5
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
© 2024. The Author(s), under exclusive licence to Springer Nature America, Inc.
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