Identification of long-lived proteins reveals exceptional stability of essential cellular structures.

Identification of long-lived proteins reveals exceptional stability of essential cellular structures.
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DOI:
10.1016/j.cell.2013.07.037
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发表时间:
2013-08-29
期刊:
影响因子:
64.5
通讯作者:
Hetzer MW
Hetzer MW
中科院分区:
生物学1区
文献类型:
--
作者:
Toyama BH;Savas JN;Park SK;Harris MS;Ingolia NT;Yates JR 3rd;Hetzer MW

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Intracellular proteins with long lifespans have recently been linked to age-dependent defects, ranging from decreased fertility to the functional decline of neurons. Why long-lived proteins exist in metabolically active cellular environments and how they are maintained over time remains poorly understood. Here we provide a system-wide identification of proteins with exceptional lifespans in the rat brain. These proteins are inefficiently replenished despite being translated robustly throughout adulthood. Using nucleoporins as a paradigm for long-term protein persistence, we found that nuclear pore complexes (NPCs) are maintained over a cell’s life through slow but finite exchange of even its most stable subcomplexes. This maintenance is limited, however, as some nucleoporin levels decrease during aging, providing a rationale for the previously observed age-dependent deterioration of NPC function. Our identification of a long-lived proteome reveals cellular components that are at increased risk for damage accumulation, linking long-term protein persistence to the cellular aging process.
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发表时间: 2001-06-25
期刊: The Journal of cell biology
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