Dioleoyl‐phosphatidic acid selectively binds to α‐synuclein and strongly induces its aggregation

Dioleoyl‐phosphatidic acid selectively binds to α‐synuclein and strongly induces its aggregation
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二油酰磷脂酸选择性结合 α-突触核蛋白并强烈诱导其聚集

DOI:
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发表时间:
2017
期刊:
影响因子:
3.5
通讯作者:
F. Sakane
F. Sakane
中科院分区:
生物学3区
文献类型:
--
作者:
S. Mizuno;Hirotaka Sasai;A. Kume;D. Takahashi;M. Satoh;Sayaka Kado;F. Sakane

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α - 突触核蛋白(α - syn)与帕金森病有因果关联,它会与含有磷脂酸(PA)的囊泡结合。然而,PA的脂肪酰基链对其与α - syn蛋白结合能力的影响仍不清楚。有趣的是,我们发现,在几种PA种类中,18:1/18:1 - PA是与α - syn蛋白结合最强的PA。此外,18:1/18:1 - PA比16:0/18:1 - PA更能强烈地促进从无规卷曲形式到α - 螺旋形式的二级结构变化。而且,与16:0/18:1 - PA相比,18:1/18:1 - PA更显著地加速多聚体以及抗蛋白酶K的α - syn蛋白的产生。这些结果表明,在迄今为止所研究的磷脂中,18:1/18:1 - PA显示出与α - syn最强的结合,以及对其二级结构变化和聚集体形成最有效的促进作用。
α‐Synuclein (α‐syn), which causally links to Parkinson's disease, binds to vesicles containing phosphatidic acid (PA). However, the effects of the fatty acyl chains of PA on its ability to bind to α‐syn protein remain unclear. Intriguingly, we reveal that among several PA species, 18:1/18:1‐PA is the most strongly bound PA to the α‐syn protein. Moreover, 18:1/18:1‐PA more strongly enhances secondary structural changes from the random coil form to the α‐helical form than 16:0/18:1‐PA. Furthermore, 18:1/18:1‐PA more markedly accelerates generation of multimeric and proteinase K‐resistant α‐syn protein compared to 16:0/18:1‐PA. These results indicate that among phospholipids examined so far, 18:1/18:1‐PA demonstrates the strongest binding to α‐syn, as well as the most effective enhancement of its secondary structural changes and aggregation formation.
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