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Título
Functional role of respiratory supercomplexes in mice: SCAF1 relevance and segmentation of the Qpool
Autor(es)
Calvo, Enrique CNIC | Cogliati, Sara CNIC | Hernansanz-Agustin, Pablo | Loureiro-López, Marta | Guaras, Adela CNIC | Casuso, Rafael A. | Garcia-Marques, Fernando CNIC | Acin-Perez, Rebeca CNIC | Martí-Mateos, Yolanda | Silla-Castro, JC. | Carro-Alvarellos, Marta | Huertas, Jesús R. | Vazquez, Jesus CNIC | Enriquez, Jose Antonio CNIC
Fecha de publicación
2020-06
Cita
Sci Adv. 2020; 6(26):eaba7509
Idioma
Inglés
Tipo de documento
journal article
Resumen
Mitochondrial respiratory complexes assemble into supercomplexes (SC). Q-respirasome (III2 + IV) requires the supercomplex assembly factor (SCAF1) protein. The role of this factor in the N-respirasome (I + III2 + IV) and the physiological role of SCs are controversial. Here, we study C57BL/6J mice harboring nonfunctional SCAF1, the full knockout for SCAF1, or the wild-type version of the protein and found that exercise performance is SCAF1 dependent. By combining quantitative data–independent proteomics, 2D Blue native gel electrophoresis, and functional analysis of enriched respirasome fractions, we show that SCAF1 confers structural attachment between III2 and IV within the N-respirasome, increases NADH-dependent respiration, and reduces reactive oxygen species (ROS). Furthermore, the expression of AOX in cells and mice confirms that CI-CIII superassembly segments the CoQ in two pools and modulates CI-NADH oxidative capacity.
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DOI
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