Modeling Charge-Sign Asymmetric Solvation Free Energies With Nonlinear Boundary Conditions
Modeling Charge-Sign Asymmetric Solvation Free Energies With Nonlinear Boundary Conditions
复制标题
具有非线性边界条件的电荷符号不对称溶剂化自由能建模
DOI:
--
复制
发表时间:
2014
影响因子:
4.4
通讯作者:
M. Knepley
中科院分区:
文献类型:
--
作者:
J. Bardhan;M. Knepley
We show that charge-sign-dependent asymmetric hydration can be modeled accurately using linear Poisson theory after replacing the standard electric-displacement boundary condition with a simple nonlinear boundary condition. Using a single multiplicative scaling factor to determine atomic radii from molecular dynamics Lennard-Jones parameters, the new model accurately reproduces MD free-energy calculations of hydration asymmetries for: (i) monatomic ions, (ii) titratable amino acids in both their protonated and unprotonated states, and (iii) the Mobley "bracelet" and "rod" test problems [D. L. Mobley, A. E. Barber II, C. J. Fennell, and K. A. Dill, "Charge asymmetries in hydration of polar solutes," J. Phys. Chem. B 112, 2405-2414 (2008)]. Remarkably, the model also justifies the use of linear response expressions for charging free energies. Our boundary-element method implementation demonstrates the ease with which other continuum-electrostatic solvers can be extended to include asymmetry.
登录
查看更多内容
影响因子:
3.3
作者:
Mukhopadhyay, Abhishek;Fenley, Andrew T.;Tolokh, Igor S.;Onufriev, Alexey V.
通讯作者:
Onufriev, Alexey V.
影响因子:
4.4
作者:
Grossfield, A
通讯作者:
Grossfield, A
影响因子:
8.6
作者:
Gong, Haipeng;Freed, Karl F.
通讯作者:
Freed, Karl F.
影响因子:
5.5
作者:
Gallicchio, Emilio;Paris, Kristina;Levy, Ronald M.
通讯作者:
Levy, Ronald M.
影响因子:
4.4
作者:
Jha, Abhishek K.;Freed, Karl F.
通讯作者:
Freed, Karl F.