A Joint Experimental and Theoretical Study on the Structural and Spectroscopic Properties of the Piv-Pro-d-Ser-NHMe Peptide

IF 2.8 2区 化学 Q3 CHEMISTRY, PHYSICAL The Journal of Physical Chemistry B Pub Date : 2024-07-05 DOI:10.1021/acs.jpcb.4c01664
Sébastien Menant, Vincent Tognetti*, Hassan Oulyadi, Laure Guilhaudis* and Isabelle Ségalas-Milazzo*, 
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Abstract

In this paper, we investigate the secondary structure of the Piv-Pro-d-Ser-NHMe peptide by means of nuclear magnetic resonance (NMR) and electronic circular dichroism (ECD) experiments, in conjunction with theoretical simulations based on molecular dynamics and time-dependent density functional theory calculations including polarizable embedding to account for solvent effects. The various experimental and theoretical protocols are assessed and validated, and are shown to provide a consistent description of the turn structure adopted by this peptide in solution. In addition, a simple fitting procedure is proposed to make the simulated and experimental ECD almost perfectly match. This full methodology is finally tested on another small peptide, enlightening its efficiency and robustness.

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关于 Piv-Pro-d-Ser-NHMe 肽的结构和光谱特性的实验和理论联合研究。
在本文中,我们通过核磁共振(NMR)和电子圆二色性(ECD)实验,结合基于分子动力学和时变密度泛函理论计算(包括可极化嵌入以考虑溶剂效应)的理论模拟,研究了 Piv-Pro-d-Ser-NHMe 肽的二级结构。对各种实验和理论方案进行了评估和验证,结果表明这些方案对该肽在溶液中的转折结构提供了一致的描述。此外,还提出了一个简单的拟合程序,使模拟 ECD 与实验 ECD 几乎完全吻合。最后在另一种小肽上测试了这一完整的方法,显示了它的效率和稳健性。
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来源期刊
CiteScore
5.80
自引率
9.10%
发文量
965
审稿时长
1.6 months
期刊介绍: An essential criterion for acceptance of research articles in the journal is that they provide new physical insight. Please refer to the New Physical Insights virtual issue on what constitutes new physical insight. Manuscripts that are essentially reporting data or applications of data are, in general, not suitable for publication in JPC B.
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