Succinyl-CoA ligase ADP-forming subunit beta promotes stress granule assembly to regulate redox and drive cancer metastasis.
Proc Natl Acad Sci U S A
; 120(23): e2217332120, 2023 06 06.
Article
in En
| MEDLINE
| ID: mdl-37253003
ABSTRACT
Although recent studies demonstrate active mitochondrial metabolism in cancers, the precise mechanisms through which mitochondrial factors contribute to cancer metastasis remain elusive. Through a customized mitochondrion RNAi screen, we identified succinyl-CoA ligase ADP-forming subunit beta (SUCLA2) as a critical anoikis resistance and metastasis driver in human cancers. Mechanistically, SUCLA2, but not the alpha subunit of its enzyme complex, relocates from mitochondria to the cytosol upon cell detachment where SUCLA2 then binds to and promotes the formation of stress granules. SUCLA2-mediated stress granules facilitate the protein translation of antioxidant enzymes including catalase, which mitigates oxidative stress and renders cancer cells resistant to anoikis. We provide clinical evidence that SUCLA2 expression correlates with catalase levels as well as metastatic potential in lung and breast cancer patients. These findings not only implicate SUCLA2 as an anticancer target, but also provide insight into a unique, noncanonical function of SUCLA2 that cancer cells co-opt to metastasize.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Succinate-CoA Ligases
/
Neoplasms
Type of study:
Prognostic_studies
Limits:
Humans
Language:
En
Journal:
Proc Natl Acad Sci U S A
Year:
2023
Document type:
Article