FMRP promotes RNA localization to neuronal projections through interactions between its RGG domain and G-quadruplex RNA sequences.
Elife
; 92020 06 08.
Article
em En
| MEDLINE
| ID: mdl-32510328
ABSTRACT
The sorting of RNA molecules to subcellular locations facilitates the activity of spatially restricted processes. We have analyzed subcellular transcriptomes of FMRP-null mouse neuronal cells to identify transcripts that depend on FMRP for efficient transport to neurites. We found that these transcripts contain an enrichment of G-quadruplex sequences in their 3' UTRs, suggesting that FMRP recognizes them to promote RNA localization. We observed similar results in neurons derived from Fragile X Syndrome patients. We identified the RGG domain of FMRP as important for binding G-quadruplexes and the transport of G-quadruplex-containing transcripts. Finally, we found that the translation and localization targets of FMRP were distinct and that an FMRP mutant that is unable to bind ribosomes still promoted localization of G-quadruplex-containing messages. This suggests that these two regulatory modes of FMRP may be functionally separated. These results provide a framework for the elucidation of similar mechanisms governed by other RNA-binding proteins.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
RNA Mensageiro
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Neuritos
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Transporte de RNA
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Proteína do X Frágil da Deficiência Intelectual
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Neurônios
Limite:
Animals
Idioma:
En
Revista:
Elife
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Estados Unidos