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The TIM23 mitochondrial protein import complex: function and dysfunction
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DOI：10.1007/s00441-016-2486-7.png)
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Mitochondria acquire the majority of their proteins from the cytosol in a process that is mediated by intricate multimeric machineries designed to allow proteins to cross and/or to insert themselves into the two mitochondrial membranes. Ongoing studies carried out in yeast over the past few decades have led to the discovery of numerous protein components that constitute several mitochondrial translocases. One of these complexes, the mitochondrial TIM23, is the major translocase for matrix proteins and is the focus of this review. The components of the TIM23 complex are categorized into four functional types. The first type plays the role of receptor for preproteins in the intermembrane space. The second type forms the actual channel that allows proteins to cross the inner mitochondrial membrane. The third species functions as part of the motor that mediates the final steps of import across the inner membrane. Additional components play regulatory roles orchestrating the action of this myriad of subunits. Recent studies provide new insights into the function of the mammalian TIM23 complex and the role that it plays under pathological conditions.
Keyword:
Mitochondrial protein import
TOM complex
TIM23 complex
Import motor
Pam complex
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分享收藏NMR analyses on the interactions of the yeast Tim50 C-terminal region with the presequence and Tim50 core domain.png)
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