Mutations linked to neurological disease enhance self-association of low-complexity protein sequences.
Mutations linked to neurological disease enhance self-association of low-complexity protein sequences.
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DOI:
10.1126/science.abn5582
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发表时间:
2022-07
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影响因子:
--
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Protein domains of low sequence complexity do not fold into stable, three-dimensional structures. Nevertheless, proteins with these sequences assist in many aspects of cell organization including assembly of nuclear and cytoplasmic structures not surrounded by membranes. The dynamic nature of these cellular assemblies traces to the ability of low complexity (LC) domains to transiently self-associate via labile, cross-β structures. Mechanistic studies useful for the study of LC domain self-association have evolved over the past decade in the form of simple assays of phase separation. Here we have used such assays to demonstrate that the interactions responsible for LC domain self-association can be dictated by labile protein structures poised close to equilibrium between the folded and unfolded states. We further show that missense mutations causative of Charcot-Marie-Tooth disease and frontotemporal dementia/Alzheimer’s disease manifest their pathophysiology by enhancing the stability of otherwise labile molecular structures formed upon LC domain self-association.
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DOI:
10.1126/science.aan6398
发表时间:
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期刊:
Science (New York, N.Y.)
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