Por favor, use este identificador para citar o enlazar este Item:http://hdl.handle.net/20.500.12105/6537
Título
The cristae modulator Optic atrophy 1 requires mitochondrial ATP synthase oligomers to safeguard mitochondrial function
Autor(es)
Fecha de publicación
2018
Cita
Nat Commun. 2018; 9(1):3399
Idioma
Inglés
Tipo de documento
journal article
Resumen
It is unclear how the mitochondrial fusion protein Optic atrophy 1 (OPA1), which inhibits cristae remodeling, protects from mitochondrial dysfunction. Here we identify the mitochondrial F1Fo-ATP synthase as the effector of OPA1 in mitochondrial protection. In OPA1 overexpressing cells, the loss of proton electrochemical gradient caused by respiratory chain complex III inhibition is blunted and this protection is abolished by the ATP synthase inhibitor oligomycin. Mechanistically, OPA1 and ATP synthase can interact, but recombinant OPA1 fails to promote oligomerization of purified ATP synthase reconstituted in liposomes, suggesting that OPA1 favors ATP synthase oligomerization and reversal activity by modulating cristae shape. When ATP synthase oligomers are genetically destabilized by silencing the key dimerization subunit e, OPA1 is no longer able to preserve mitochondrial function and cell viability upon complex III inhibition. Thus, OPA1 protects mitochondria from respiratory chain inhibition by stabilizing cristae shape and favoring ATP synthase oligomerization.
Palabras clave
PERMEABILITY TRANSITION PORE | COMPLEX III DEFICIENCY | CYTOCHROME-C RELEASE | OXIDATIVE-PHOSPHORYLATION | F1F0-ATP SYNTHASE | SUPRAMOLECULAR ORGANIZATION | LIVER-MITOCHONDRIA | INHIBITOR PROTEIN | INNER MEMBRANE | SUBUNIT-G
Versión en línea
DOI
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- Nombre:
- TheCristaeModulatorOptic_2018_ ...
- Tamaño:
- 9.617Kb
- Formato:
- Microsoft Excel 2007