m6 A modification of HSATIII lncRNAs regulates temperature-dependent splicing.
EMBO J
; 40(15): e107976, 2021 08 02.
Article
em En
| MEDLINE
| ID: mdl-34184765
ABSTRACT
Nuclear stress bodies (nSBs) are nuclear membraneless organelles formed around stress-inducible HSATIII architectural long noncoding RNAs (lncRNAs). nSBs repress splicing of hundreds of introns during thermal stress recovery, which are partly regulated by CLK1 kinase phosphorylation of temperature-dependent Ser/Arg-rich splicing factors (SRSFs). Here, we report a distinct mechanism for this splicing repression through protein sequestration by nSBs. Comprehensive identification of RNA-binding proteins revealed HSATIII association with proteins related to N6 -methyladenosine (m6 A) RNA modification. 11% of the first adenosine in the repetitive HSATIII sequence were m6 A-modified. nSBs sequester the m6 A writer complex to methylate HSATIII, leading to subsequent sequestration of the nuclear m6 A reader, YTHDC1. Sequestration of these factors from the nucleoplasm represses m6 A modification of pre-mRNAs, leading to repression of m6 A-dependent splicing during stress recovery phase. Thus, nSBs serve as a common platform for regulation of temperature-dependent splicing through dual mechanisms employing two distinct ribonucleoprotein modules with partially m6 A-modified architectural lncRNAs.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Splicing de RNA
/
RNA Longo não Codificante
/
Fatores de Processamento de RNA
/
Proteínas do Tecido Nervoso
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article