COX7A2L Is a Mitochondrial Complex III Binding Protein that Stabilizes the III2+IV Supercomplex without Affecting Respirasome Formation.
COX7A2L Is a Mitochondrial Complex III Binding Protein that Stabilizes the III2+IV Supercomplex without Affecting Respirasome Formation.
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DOI:
10.1016/j.celrep.2016.07.081
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发表时间:
2016-08-30
期刊:
影响因子:
8.8
通讯作者:
Ugalde C
中科院分区:
文献类型:
--
作者:
Pérez-Pérez R;Lobo-Jarne T;Milenkovic D;Mourier A;Bratic A;García-Bartolomé A;Fernández-Vizarra E;Cadenas S;Delmiro A;García-Consuegra I;Arenas J;Martín MA;Larsson NG;Ugalde C
Mitochondrial respiratory chain (MRC) complexes I, III and IV associate into a variety of supramolecular structures known as supercomplexes and respirasomes. While COX7A2L was originally described as a supercomplex-specific factor responsible for the dynamic association of complex IV into these structures to adapt MRC function to metabolic variations, this role has been disputed. Here we further examine the functional significance of COX7A2L in the structural organization of the mammalian respiratory chain. As in the mouse, human COX7A2L binds primarily to free mitochondrial complex III and to a minor extent to complex IV to specifically promote the stabilization of the III2+IV supercomplex without affecting respirasome formation. Furthermore, COX7A2L does not affect the biogenesis, stabilization and function of the individual OXPHOS complexes. These data show that independent regulatory mechanisms for the biogenesis and turnover of different MRC supercomplex structures co-exist.
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影响因子:
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