纤颤
纤维
生物物理学
化学
蛋白质聚集
动力学
成核
分子动力学
生物化学
生物
医学
心房颤动
计算化学
心脏病学
有机化学
物理
量子力学
摘要
α-Synuclein is a small (14 kDa), abundant, intrinsically disordered presynaptic protein, whose aggregation is believed to be a critical step in Parkinson's disease (PD). The kinetics of α-synuclein fibrillation are consistent with a nucleation-dependent mechanism, in which the critical early stage of the structural transformation involves a partially folded intermediate. Although the basis for the toxic effects of aggregated α-synuclein are unknown, it has been proposed that transient oligomers are responsible, possibly by forming pores in membranes. In this Account, I discuss our investigations into the molecular basis for α-synuclein aggregation/fibrillation, including factors that either accelerate or inhibit fibrillation, effects of molecular crowding, oxidation, point mutations, and lipid membranes, as well as the variety of conformational and oligomeric states that α-synuclein can adopt. It is apparent that neuronal cells must have a very fine balance of factors that control the levels and potential aggregation of α-synuclein.
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