Structural evolution of fibril polymorphs during amyloid assembly

Structural evolution of fibril polymorphs during amyloid assembly
复制标题

淀粉样蛋白组装过程中原纤维多晶型物的结构演化

DOI:
10.1016/j.cell.2023.11.025
复制
发表时间:
2023
期刊:
影响因子:
64.5
通讯作者:
Wilkinson M
Wilkinson M
中科院分区:
生物学1区
文献类型:
--
作者:
Wilkinson M

文献摘要

参考文献

相似文献

冷冻电子显微镜(cryo-EM)为淀粉样蛋白原纤维结构提供了前所未有的见解,包括与疾病相关的结构。然而,这些结构代表了长组装过程的终点,它们与组装早期形成的原纤维的关系尚不清楚。因此,在组装过程中是否会形成具有潜在不同病理性质的不同原纤维结构仍然未知。在此,我们使用冷冻电镜来确定淀粉样纤维的结构,在不同的时间在体外原纤化的疾病相关的变体人胰岛淀粉样多肽(IAPP-S20 G)。引人注目的是,在滞后期、生长期和平台期形成的原纤维具有不同的结构,随着原纤维化的进行,新的形式出现,其他形式消失。野生型hIAPP的时程也显示原纤维随时间变化,表明这是IAPP淀粉样蛋白组装的一般性质。短暂填充的原纤维结构的观察有意义的理解淀粉样蛋白的组装机制与潜在的新见解淀粉样蛋白疾病的进展。
Cryoelectron microscopy (cryo-EM) has provided unprecedented insights into amyloid fibril structures, including those associated with disease. However, these structures represent the endpoints of long assembly processes, and their relationship to fibrils formed early in assembly is unknown. Consequently, whether different fibril architectures, with potentially different pathological properties, form during assembly remains unknown. Here, we used cryo-EM to determine structures of amyloid fibrils at different times duringin vitrofibrillation of a disease-related variant of human islet amyloid polypeptide (IAPP-S20G). Strikingly, the fibrils formed in the lag, growth, and plateau phases have different structures, with new forms appearing and others disappearing as fibrillation proceeds. A time course with wild-type hIAPP also shows fibrils changing with time, suggesting that this is a general property of IAPP amyloid assembly. The observation of transiently populated fibril structures has implications for understanding amyloid assembly mechanisms with potential new insights into amyloid progression in disease.
DOI: 10.1016/j.jmb.2008.11.005
发表时间: 2009-02-27
影响因子: 5.6
作者:
Meinhardt J;Sachse C;Hortschansky P;Grigorieff N;Fändrich M
通讯作者: Fändrich M
DOI: 10.1016/j.bbapap.2010.04.001
发表时间: 2010-07
期刊: Biochimica et biophysica acta
影响因子: --
作者:
Biancalana M;Koide S
通讯作者: Koide S
DOI: 10.1038/s41594-019-0248-4
发表时间: 2019-07-01
影响因子: 16.8
作者:
Cao, Qin;Boyer, David R.;Eisenberg, David S.
通讯作者: Eisenberg, David S.
DOI: 10.1038/s41467-021-21129-z
发表时间: 2021-02-12
影响因子: 16.6
作者:
Bansal A;Schmidt M;Rennegarbe M;Haupt C;Liberta F;Stecher S;Puscalau-Girtu I;Biedermann A;Fändrich M
通讯作者: Fändrich M
DOI: 10.1038/s41594-021-00646-x
发表时间: 2021-09
影响因子: 16.8
作者:
Cao, Qin;Boyer, David R.;Sawaya, Michael R.;Abskharon, Romany;Saelices, Lorena;Nguyen, Binh A.;Lu, Jiahui;Murray, Kevin A.;Kandeel, Fouad;Eisenberg, David S.
通讯作者: Eisenberg, David S.