The fuzzy coat of pathological human Tau fibrils is a two-layered polyelectrolyte brush
The fuzzy coat of pathological human Tau fibrils is a two-layered polyelectrolyte brush
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病理性人类 Tau 原纤维的毛茸茸的外套是两层聚电解质刷
DOI:
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发表时间:
2012
影响因子:
11.1
通讯作者:
D. Müller
中科院分区:
文献类型:
--
作者:
Susanne Wegmann;Izhar D Medalsy;E. Mandelkow;D. Müller
The structure and properties of amyloid-like Tau fibrils accumulating in neurodegenerative diseases have been debated for decades. Although the core of Tau fibrils assembles from short β-strands, the properties of the much longer unstructured Tau domains protruding from the fibril core remain largely obscure. Applying immunogold transmission EM, and force-volume atomic force microscopy (AFM), we imaged human Tau fibrils at high resolution and simultaneously mapped their mechanical and adhesive properties. Tau fibrils showed a ≈16-nm–thick fuzzy coat that resembles a two-layered polyelectrolyte brush, which is formed by the unstructured short C-terminal and long N-terminal Tau domains. The mechanical and adhesive properties of the fuzzy coat are modulated by electrolytes and pH, and thus by the cellular environment. These unique properties of the fuzzy coat help in understanding how Tau fibrils disturb cellular interactions and accumulate in neurofibrillary tangles.
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