Oncogenic translation directs spliceosome dynamics revealing an integral role for SF3A3 in breast cancer.
Mol Cell
; 81(7): 1453-1468.e12, 2021 04 01.
Article
em En
| MEDLINE
| ID: mdl-33662273
ABSTRACT
Splicing is a central RNA-based process commonly altered in human cancers; however, how spliceosomal components are co-opted during tumorigenesis remains poorly defined. Here we unravel the core splice factor SF3A3 at the nexus of a translation-based program that rewires splicing during malignant transformation. Upon MYC hyperactivation, SF3A3 levels are modulated translationally through an RNA stem-loop in an eIF3D-dependent manner. This ensures accurate splicing of mRNAs enriched for mitochondrial regulators. Altered SF3A3 translation leads to metabolic reprogramming and stem-like properties that fuel MYC tumorigenic potential in vivo. Our analysis reveals that SF3A3 protein levels predict molecular and phenotypic features of aggressive human breast cancers. These findings unveil a post-transcriptional interplay between splicing and translation that governs critical facets of MYC-driven oncogenesis.
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Base de dados:
MEDLINE
Assunto principal:
Biossíntese de Proteínas
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Células-Tronco Neoplásicas
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Neoplasias da Mama
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Spliceossomos
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Carcinogênese
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Fatores de Processamento de RNA
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article