Amphiphilic adsorption of human islet amyloid polypeptide aggregates to lipid/aqueous interfaces.

Amphiphilic adsorption of human islet amyloid polypeptide aggregates to lipid/aqueous interfaces.
复制标题

DOI:
10.1016/j.jmb.2011.12.035
复制
发表时间:
2012-08-24
影响因子:
5.6
通讯作者:
Yan, Elsa C. Y.
Yan, Elsa C. Y.
中科院分区:
生物学2区
文献类型:
--
作者:
Xiao, Dequan;Fu, Li;Liu, Jian;Batista, Victor S.;Yan, Elsa C. Y.

文献摘要

参考文献

被引文献

相似文献

许多淀粉样蛋白在疾病(如帕金森病和II型糖尿病)发作时与生物膜相互作用后错误折叠成β-折叠聚集体。触发聚集的分子机制取决于β-折叠在细胞膜上的取向。然而,理解β-折叠如何吸附到脂质/水界面上是具有挑战性的。在这里,我们结合联合收割机手性和频发生(SFG)光谱和从头计算量子化学计算的基础上分而治之的策略,以表征人类胰岛淀粉样多肽(hIAPP)在脂/水界面的取向。我们表明,聚集体与相对于界面成48°取向的β链结合。这种取向反映了hIAPP β-折叠聚集体的两亲性,并表明对膜完整性的潜在破坏作用。
Many amyloid proteins misfold into β-sheet aggregates upon interacting with biomembranes at the onset of diseases, such as Parkinson’s disease and type II diabetes. The molecular mechanisms triggering aggregation depend on the orientation of β-sheets at the cell membranes. However, understanding how β-sheets adsorb onto lipid/aqueous interfaces is challenging. Here, we combine chiral sum frequency generation (SFG) spectroscopy and ab initio quantum chemistry calculations based on a divide-and-conquer strategy to characterize the orientation of human islet amyloid polypeptides (hIAPP) at lipid/aqueous interfaces. We show that the aggregates bind with β-strands oriented at 48° relative to the interface. This orientation reflects the amphiphilic properties of hIAPP β-sheet aggregates and suggests the potential disruptive effect on membrane integrity.
DOI: 10.1021/ja909546b
发表时间: 2010-04-21
影响因子: 15
作者:
Fu, Li;Ma, Gang;Yan, Elsa C. Y.
通讯作者: Yan, Elsa C. Y.
DOI: 10.1021/bi050840w
发表时间: 2005-09-13
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
Jayasinghe, SA;Langen, R
通讯作者: Langen, R
DOI: 10.1021/jp052793n
发表时间: 2005-09-22
影响因子: 2.9
作者:
Irikura, KK;Johnson, RD;Kacker, RN
通讯作者: Kacker, RN
DOI: 10.1021/ja201575e
发表时间: 2011-06-01
影响因子: 15
作者:
Fu, Li;Liu, Jian;Yan, Elsa C. Y.
通讯作者: Yan, Elsa C. Y.
DOI: 10.1103/physrevlett.85.4474
发表时间: 2000-11-20
影响因子: 8.6
作者:
Belkin, MA;Kulakov, TA;Shen, YR
通讯作者: Shen, YR