Splice site m6A methylation prevents binding of U2AF35 to inhibit RNA splicing.
Cell
; 184(12): 3125-3142.e25, 2021 06 10.
Article
em En
| MEDLINE
| ID: mdl-33930289
ABSTRACT
The N6-methyladenosine (m6A) RNA modification is used widely to alter the fate of mRNAs. Here we demonstrate that the C. elegans writer METT-10 (the ortholog of mouse METTL16) deposits an m6A mark on the 3' splice site (AG) of the S-adenosylmethionine (SAM) synthetase pre-mRNA, which inhibits its proper splicing and protein production. The mechanism is triggered by a rich diet and acts as an m6A-mediated switch to stop SAM production and regulate its homeostasis. Although the mammalian SAM synthetase pre-mRNA is not regulated via this mechanism, we show that splicing inhibition by 3' splice site m6A is conserved in mammals. The modification functions by physically preventing the essential splicing factor U2AF35 from recognizing the 3' splice site. We propose that use of splice-site m6A is an ancient mechanism for splicing regulation.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Adenosina
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Splicing de RNA
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Sítios de Splice de RNA
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Fator de Processamento U2AF
Limite:
Animals
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Humans
Idioma:
En
Revista:
Cell
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Suíça