Amphiphilic adsorption of human islet amyloid polypeptide aggregates to lipid/aqueous interfaces.
Amphiphilic adsorption of human islet amyloid polypeptide aggregates to lipid/aqueous interfaces.
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DOI:
10.1016/j.jmb.2011.12.035
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发表时间:
2012-08-24
影响因子:
5.6
通讯作者:
Yan, Elsa C. Y.
中科院分区:
文献类型:
--
作者:
Xiao, Dequan;Fu, Li;Liu, Jian;Batista, Victor S.;Yan, Elsa C. Y.
关键词:
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.
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影响因子:
15
作者:
Fu, Li;Ma, Gang;Yan, Elsa C. Y.
通讯作者:
Yan, Elsa C. Y.
影响因子:
2.9
作者:
Jayasinghe, SA;Langen, R
通讯作者:
Langen, R
影响因子:
2.9
作者:
Irikura, KK;Johnson, RD;Kacker, RN
通讯作者:
Kacker, RN
影响因子:
15
作者:
Fu, Li;Liu, Jian;Yan, Elsa C. Y.
通讯作者:
Yan, Elsa C. Y.
影响因子:
8.6
作者:
Belkin, MA;Kulakov, TA;Shen, YR
通讯作者:
Shen, YR