4.5 Article

Learning the Hydrophobic, Hydrophilic, and Aromatic Character of Amino Acids from Thermal Relaxation and Interfacial Thermal Conductance

期刊

JOURNAL OF PHYSICAL CHEMISTRY B
卷 126, 期 3, 页码 670-678

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcb.1c07628

关键词

-

资金

  1. Imam Khomeini International University
  2. Abdus Salam International Centre for Theoretical Physics
  3. School of Nano Science of Institute for Research in Fundamental Sciences

向作者/读者索取更多资源

In this study, the thermal relaxation of amino acids in water and in protein lysozyme was investigated using molecular dynamics simulations. The results showed that the relaxation times of the amino acids in water were influenced by the size of hydrocarbon side chain for hydrophobic amino acids, and the number of hydrogen bonds did not significantly affect the time scales for hydrophilic amino acids. Additionally, the thermal relaxation of amino acids in the protein was found to slow down by up to five times compared to that in water, primarily due to the size of the hydrophobic side chain.
In this study, the thermal relaxation of the 20 naturally occurring amino acids in water and in the protein lysozyme is investigated using transient nonequilibrium molecular dynamics simulations. By modeling the thermal relaxation process, the relaxation times of the amino acids in water occurs over a time scale covering 2-5 ps. For the hydrophobic amino acids, the relaxation time is controlled by the size of the hydrocarbon side chain, while for hydrophilic amino acids, the number of hydrogen bonds does not significantly affect the time scales of the heat dissipation. Our results show that the interfacial thermal conductance at the amino acid-water interface is in the range of 40-80 MW m(-2) K-1. Hydrophobic and aromatic amino acids tend to have a lower interfacial thermal conductance. Notably, we show that amino acids can be correlated with their thermal relaxation times and molar masses, into simply connected phases with the same hydrophilicity, hydrophobicity, and aromaticity. The thermal relaxation slows down by a factor of up to five in the protein relative to that in water. In the case of the hydrophobic amino acids in the protein lysozyme, the slow down in the thermal relaxation relative to that in water appears to be controlled primarily by the size of the side chain.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据