The Proteome Folding Problem and Cellular Proteostasis.

The Proteome Folding Problem and Cellular Proteostasis.
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DOI:
10.1016/j.jmb.2021.167197
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发表时间:
2021-10-01
影响因子:
5.6
通讯作者:
Gierasch LM
Gierasch LM
中科院分区:
生物学2区
文献类型:
--
作者:
Powers ET;Gierasch LM

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在解决蛋白质折叠问题方面取得了惊人的进展,对蛋白质导航能量景观以达到其天然状态的机制有了更深入的了解,并使强大的算法能够将序列与结构联系起来。然而,体内蛋白质折叠问题的现实仍然是一个需要考虑的挑战。在这里,我们讨论了“蛋白质组折叠问题”的概念--生物体如何构建和维持功能性蛋白质组的问题--承认折叠能量景观的特征是许多错误折叠状态,并且细胞必须部署分子伴侣网络和降解酶以最大限度地减少这些偏离途径物种的有害影响。由此产生的蛋白质抑制网络是体内蛋白质折叠不可分割的一部分,如果我们要解决蛋白质组折叠问题,必须详细了解。我们讨论了如何发展的计算模型的proteostasis网络的行动和蛋白质组的生物物理特性的关系已经开始提供新的见解和能力。
Stunning advances have been achieved in addressing the protein folding problem, providing deeper understanding of the mechanisms by which proteins navigate energy landscapes to reach their native states and enabling powerful algorithms to connect sequence to structure. However, the realities of the in vivo protein folding problem remain a challenge to reckon with. Here, we discuss the concept of the “proteome folding problem”—the problem of how organisms build and maintain a functional proteome—by admitting that folding energy landscapes are characterized by many misfolded states and that cells must deploy a network of chaperones and degradation enzymes to minimize deleterious impacts of these off-pathway species. The resulting proteostasis network is an inextricable part of in vivo protein folding and must be understood in detail if we are to solve the proteome folding problem. We discuss how the development of computational models for the proteostasis network’s actions and the relationship to the biophysical properties of the proteome has begun to offer new insights and capabilities.
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