Accelerated in vitro fibril formation by a mutant α-synuclein linked to early-onset Parkinson disease

被引:1273
作者
Conway, KA
Harper, JD
Lansbury, PT
机构
[1] Harvard Univ, Sch Med, Harvard Inst Med, Brigham & Womens Hosp,Ctr Neurol Dis, Boston, MA 02115 USA
[2] Harvard Univ, Sch Med, Harvard Inst Med, Dept Neurol, Boston, MA 02115 USA
基金
美国国家科学基金会;
关键词
D O I
10.1038/3311
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Two mutations in the gene encoding alpha-synuclein have been linked to early-onset Parkinson's disease(1-3) (PD). alpha-Synuclein is a component of Lewy bodies, the fibrous cytoplasmic inclusions characteristic of nigral dopaminergic neurons in the PD brain(4). This connection between genetics and pathology suggests that the alpha-synuclein mutations may promote PD pathogenesis by accelerating Lewy body formation. To test this, we studied alpha-synuclein folding and aggregation in vitro, in the absence of other Lewy body-associated molecules. We demonstrate here that both mutant forms of alpha-synuclein (A53T and A30P) are, like wild-type alpha-synuclein(5) (WT), disordered in dilute solution. However, at higher concentrations, Lewy body-like fibrils and discrete spherical assemblies are formed; most rapidly by A53T. Thus, mutation-induced acceleration of alpha-synuclein fibril formation may contribute to the early onset of familial PD.
引用
收藏
页码:1318 / 1320
页数:3
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