Solid-state NMR of paired helical filaments formed by the core tau fragment tau(297-391)
Solid-state NMR of paired helical filaments formed by the core tau fragment tau(297-391)
复制标题
由核心 tau 片段 tau (297-391) 形成的成对螺旋丝的固态 NMR
DOI:
10.1101/2022.06.09.495520
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Al-Hilaly Y
中科院分区:
文献类型:
--
作者:
Al-Hilaly Y
Aggregation of the tau protein into fibrillar cross-β aggregates is a hallmark of Alzheimer’s diseases (AD) and many other neurodegenerative tauopathies. Recently, several core structures of patient-derived tau paired helical filaments (PHFs) have been solved revealing a structural variability that often correlates with a specific tauopathy. To further characterize the dynamics of these fibril cores, to screen for strain-specific small molecules as potential biomarkers and therapeutics, and to develop strain-specific antibodies, recombinant in-vitro models of tau filaments are needed. We recently showed that a 95-residue fragment of tau (from residue 297 to 391), termed dGAE, forms filamentsin vitroin the absence of polyanionic co-factors often used forin vitroaggregation of full-length tau. Tau(297-391) was identified as the proteolytic resistant core of tau PHFs and overlaps with the structures characterized by cryo-electron microscopy inex vivoPHFs, making it a promising model for the study of AD tau filamentsin vitro. In the present study, we used solid-state NMR to characterize tau(297-391) filaments and show that such filaments assembled under non-reducing conditions are more dynamic and less ordered than those made in the presence of the reducing agent DTT. We further report the resonance assignment of tau(297-391)+DTT filaments and compare it to existing core structures of tau.
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通讯作者:
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