Potential energy interpolation with target-customized weighting coordinates: application to excited-state dynamics of photoactive yellow protein chromophore in water

被引:1
作者
Kim, Seung Soo [1 ]
Rhee, Young Min [1 ]
机构
[1] Korea Adv Inst Sci & Technol KAIST, Dept Chem, Daejeon 34141, South Korea
基金
新加坡国家研究基金会;
关键词
MULTICONFIGURATION MOLECULAR-MECHANICS; MODIFIED SHEPARD INTERPOLATION; MATTHEWS-OLSON COMPLEX; GAUSSIAN-TYPE BASIS; AB-INITIO; FLUORESCENT PROTEIN; ORBITAL METHODS; CHEMICAL-REACTION; HOOP MODE; SURFACES;
D O I
10.1039/d3cp05643k
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Interpolation of potential energy surfaces (PESs) can provide a practical route to performing molecular dynamics simulations with a reliability matching a high-level quantum chemical calculation. An obstacle to its widespread use is perhaps the lack of general and optimal interpolation settings that can be applied in a black-box manner for any given molecular system. How to set up the weights for interpolation is one such task, and we still need to diversify the approaches in order to treat various systems. Here, we develop a new interpolation weighting scheme, which allows us to choose the weighting coordinates in a system-specific manner, by amplifying the contribution from specific internal coordinates. The new weighting scheme with an appropriate selection of coordinates is proved to be effective in reducing the interpolation error along the reaction pathway. As a demonstration, we consider the photoactive yellow protein chromophore system, as it constitutes itself as an interesting target that bears long-standing questions related to excited-state dynamics inside protein environments. We build its two-state diabatic interpolated PES with the new weighting scheme. We indeed see the utility of our scheme by conducting nonadiabatic molecular dynamics simulations with the required semi-global PES based on a limited number of data points. Diabatic potential energy surfaces of photoactive yellow protein chromophore were constructed using an improved Shepard interpolation scheme, toward better handling of flexible organic chromophores.
引用
收藏
页码:9021 / 9036
页数:16
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