Insights into the Origin of Distinct Medin Fibril Morphologies Induced by Incubation Conditions and Seeding.

Insights into the Origin of Distinct Medin Fibril Morphologies Induced by Incubation Conditions and Seeding.
复制标题

DOI:
10.3390/ijms19051357
复制
发表时间:
2018-05-03
影响因子:
5.6
通讯作者:
Madine J
Madine J
中科院分区:
生物学2区
文献类型:
--
作者:
Davies HA;Lee CF;Miller L;Liu LN;Madine J

文献摘要

参考文献

相似文献

孵育条件是研究蛋白质体外聚集时要考虑的一个重要因素。在这里,我们使用生物物理方法和原子力显微镜来显示,搅拌显著改变了沉积在主动脉中的淀粉样蛋白Medin的形态。搅拌将原纤化的滞后时间减少了约18倍,这表明原纤维的形成速度在指导原纤维内的蛋白质堆积排列方面起着关键作用。利用预制的超声波纤维作为种子,我们探讨了播种对Medin纤维颤动的作用,揭示了三种不同的纤维形态,并用生物物理模型解释了实验观察的显著特征。我们发现,不同纤维形态的成核途径可以根据种子纤维的性质和生长条件而开启和关闭。这些发现可能会影响基于淀粉样蛋白的生物材料的发展,并加深对种子作为一种病理机制的理解。
Incubation conditions are an important factor to consider when studying protein aggregation in vitro. Here, we employed biophysical methods and atomic force microscopy to show that agitation dramatically alters the morphology of medin, an amyloid protein deposited in the aorta. Agitation reduces the lag time for fibrillation by ~18-fold, suggesting that the rate of fibril formation plays a key role in directing the protein packing arrangement within fibrils. Utilising preformed sonicated fibrils as seeds, we probed the role of seeding on medin fibrillation and revealed three distinct fibril morphologies, with biophysical modelling explaining the salient features of experimental observations. We showed that nucleation pathways to distinct fibril morphologies may be switched on and off depending on the properties of the seeding fibrils and growth conditions. These findings may impact on the development of amyloid-based biomaterials and enhance understanding of seeding as a pathological mechanism.
DOI: 10.1074/jbc.m110.215814
发表时间: 2011-07-01
影响因子: 4.8
作者:
Jha, Suman;Patil, Sharadrao M.;Alexandrescu, Andrei T.
通讯作者: Alexandrescu, Andrei T.
DOI: 10.1126/science.1173155
发表时间: 2009-07-17
期刊: Science (New York, N.Y.)
影响因子: --
作者:
Maji SK;Perrin MH;Sawaya MR;Jessberger S;Vadodaria K;Rissman RA;Singru PS;Nilsson KP;Simon R;Schubert D;Eisenberg D;Rivier J;Sawchenko P;Vale W;Riek R
通讯作者: Riek R
DOI: 10.1074/jbc.m114.602177
发表时间: 2015-03-20
期刊: The Journal of biological chemistry
影响因子: --
作者:
Davies HA;Madine J;Middleton DA
通讯作者: Middleton DA
DOI: 10.1016/j.bpj.2010.10.039
发表时间: 2010-12-01
影响因子: 3.4
作者:
Morel, Bertrand;Varela, Lorena;Conejero Lara, Francisco
通讯作者: Conejero Lara, Francisco
DOI: 10.3109/13506129.2011.630761
发表时间: 2011-12-01
影响因子: 5.5
作者:
Larsson, Annika;Malmstrom, Susanna;Westermark, Per
通讯作者: Westermark, Per