OPA1 and MICOS Regulate mitochondrial crista dynamics and formation.
OPA1 and MICOS Regulate mitochondrial crista dynamics and formation.
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OPA1 和 MICOS 调节线粒体嵴动力学和形成。
DOI:
10.1038/s41419-020-03152-y
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发表时间:
2020-10-31
影响因子:
9
通讯作者:
Song Z
中科院分区:
文献类型:
--
作者:
Hu C;Shu L;Huang X;Yu J;Li L;Gong L;Yang M;Wu Z;Gao Z;Zhao Y;Chen L;Song Z
Mitochondrial cristae are the main site for oxidative phosphorylation, which is critical for cellular energy production. Upon different physiological or pathological stresses, mitochondrial cristae undergo remodeling to reprogram mitochondrial function. However, how mitochondrial cristae are formed, maintained, and remolded is still largely unknown due to the technical challenges of tracking mitochondrial crista dynamics in living cells. Here, using live-cell Hessian structured illumination microscopy combined with transmission electron microscopy, focused ion beam/scanning electron microscopy, and three-dimensional tomographic reconstruction, we show, in living cells, that mitochondrial cristae are highly dynamic and undergo morphological changes, including elongation, shortening, fusion, division, and detachment from the mitochondrial inner boundary membrane (IBM). In addition, we find that OPA1, Yme1L, MICOS, and Sam50, along with the newly identified crista regulator ATAD3A, control mitochondrial crista dynamics. Furthermore, we discover two new types of mitochondrial crista in dysfunctional mitochondria, “cut-through crista” and “spherical crista”, which are formed due to incomplete mitochondrial fusion and dysfunction of the MICOS complex. Interestingly, cut-through crista can convert to “lamellar crista”. Overall, we provide a direct link between mitochondrial crista formation and mitochondrial crista dynamics.
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