Interactome analysis of the Tudor domain-containing protein SPF30 which associates with the MTR4-exosome RNA-decay machinery under the regulation of AAA-ATPase NVL2.
Int J Biochem Cell Biol
; 132: 105919, 2021 03.
Article
em En
| MEDLINE
| ID: mdl-33422691
ABSTRACT
The AAA-ATPase NVL2 associates with an RNA helicase MTR4 and the nuclear RNA exosome in the course of ribosome biogenesis. In our proteomic screen, we had identified a ribosome biogenesis factor WDR74 as a MTR4-interacting partner, whose dissociation is stimulated by the ATP hydrolysis of NVL2. In this study, we report the identification of splicing factor 30 (SPF30), another MTR4-interacting protein with a similar regulatory mechanism. SPF30 is a pre-mRNA splicing factor harboring a Tudor domain in its central region, which regulates various cellular events by binding to dimethylarginine-modified proteins. The interaction between SPF30 and the exosome core is mediated by MTR4 and RRP6, a catalytic component of the nuclear exosome. The N- and C-terminal regions, but not the Tudor domain, of SPF30 are involved in the association with MTR4 and the exosome. The knockdown of SPF30 caused subtle delay in the 12S pre-rRNA processing to mature 5.8S rRNA, even though no obvious effect was observed on the ribosome subunit profile in the cells. Shotgun proteomic analysis to search for SPF30-interacting proteins indicated its role in ribosome biogenesis, pre-mRNA splicing, and box C/D snoRNA biogenesis. These results suggest that SPF30 collaborates with the MTR4-exosome machinery to play a functional role in multiple RNA metabolic pathways, some of which may be regulated by the ATP hydrolysis of NVL2.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
RNA Helicases
/
Estabilidade de RNA
/
Exossomos
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Proteínas do Complexo SMN
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Fatores de Processamento de RNA
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ATPases Associadas a Diversas Atividades Celulares
Tipo de estudo:
Prognostic_studies
/
Risk_factors_studies
Limite:
Humans
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article