Nature:发现阿尔茨海默tau蛋白纤维结构的研究者,这次又盯上了皮克病

2018-08-30 Nature自然科研 Nature自然科研

《自然》本周发表的一篇论文Structures of filaments from Pick’s disease reveal a novel tau protein fold详细阐述了皮克病(pick’s disease)的tau蛋白纤维的结构——皮克病是一种以额、颞叶痴呆为特征的神经退行性疾病。

《自然》本周发表的一篇论文Structures of filaments from Pick’s disease reveal a novel tau protein fold详细阐述了皮克病(pick’s disease)的tau蛋白纤维的结构——皮克病是一种以额、颞叶痴呆为特征的神经退行性疾病。

皮克病tau蛋白纤维的折叠结构。

许多神经退行性疾病都有tau蛋白聚集的特点,并会在脑中形成蛋白纤维。tau蛋白可能含有三个或四个微管结合重复片段(3R或4R),而tau蛋白纤维可能含有3R tau、4R tau或两者的结合。英国MRC分子生物学实验室的Michel Goedert、Sjors Scheres和同事运用冷冻电镜(cryo-EM)来确定从皮克病患者额颞叶皮质提取的tau蛋白纤维的结构。他们此前曾报告了阿尔茨海默症患者的tau蛋白纤维结构,并指出其中含有3R和4R tau。如今,作者在皮克病患者脑中的tau蛋白纤维的有序核心区内,发现了与阿尔茨海默症患者脑中的tau蛋白纤维折叠不同的、一种新的3r tau单链折叠。

皮克病和阿尔茨海默症tau蛋白纤维的折叠结构比较。

发现tau蛋白纤维的这种疾病特异性折叠,进一步支持了一种假说——即不同的纤维状tau蛋白构型导致了不同的临床表型。破解这些不同的折叠方式和形状有助于进一步加深对大量蛋白异常聚集相关疾病的认识。

原始出处:
Benjamin Falcon, Wenjuan Zhang, Alexey G. Murzin,et al.Structures of filaments from Pick’s disease reveal a novel tau protein fold.nature.29 August 2018

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    2019-07-04 liye789132251
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    2018-09-11 stfoxst
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    2018-08-31 szhvet

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