Visualization of cytosolic ribosomes on the surface of mitochondria by electron cryo-tomography.

Visualization of cytosolic ribosomes on the surface of mitochondria by electron cryo-tomography.
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DOI:
10.15252/embr.201744261
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发表时间:
2017-10
期刊:
影响因子:
7.7
通讯作者:
Chacinska A
Chacinska A
中科院分区:
生物学2区
文献类型:
--
作者:
Gold VA;Chroscicki P;Bragoszewski P;Chacinska A

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We employed electron cryo‐tomography to visualize cytosolic ribosomes on the surface of mitochondria. Translation‐arrested ribosomes reveal the clustered organization of the TOM complex, corroborating earlier reports of localized translation. Ribosomes are shown to interact specifically with the TOM complex, and nascent chain binding is crucial for ribosome recruitment and stabilization. Ribosomes are bound to the membrane in discrete clusters, often in the vicinity of the crista junctions. This interaction highlights how protein synthesis may be coupled with transport. Our work provides unique insights into the spatial organization of cytosolic ribosomes on mitochondria.
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