Frequency distribution of the amide-I vibration sorted by residues in amyloid fibrils revealed by 2D-IR measurements and simulations.

Frequency distribution of the amide-I vibration sorted by residues in amyloid fibrils revealed by 2D-IR measurements and simulations.
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DOI:
10.1021/jp2096423
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发表时间:
2012-03-15
影响因子:
3.3
通讯作者:
Mukamel, Shaul
Mukamel, Shaul
中科院分区:
化学3区
文献类型:
--
作者:
Falvo, Cyril;Zhuang, Wei;Kim, Yung Sam;Axelsen, Paul H.;Hochstrasser, Robin M.;Mukamel, Shaul

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研究了淀粉样原纤维Aβ1-40的红外光学响应。对对应不同质子化态的两种模型的模拟结果与实验结果进行了比较。模拟结果表明,纤维内部的振动频率分布主要受侧链波动的影响。我们进一步证实了基于2D-IR测量的早期建议,即水分子可以被困在原纤维中。
The infrared optical response of Amyloid Fibrils Aβ1–40 is investigated. Simulations of two models corresponding to different protonation states are compared with experiment. The simulations reveal that vibrational frequency distributions inside the fibrils are dominated by sidechain fluctuations. We further confirm earlier suggestions based on 2D-IR measurements that water molecules can be trapped inside the fibrils.
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