CHEN Jingsi,LIU Fang,WU Yi,et al.DFT study on enantiomerism of calcium diatomic valine complexes (Val·Ca2+) in physiological environment[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2025,64(02):76-85.
CHEN Jingsi,LIU Fang,WU Yi,et al.DFT study on enantiomerism of calcium diatomic valine complexes (Val·Ca2+) in physiological environment[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2025,64(02):76-85. DOI: 10.13471/j.cnki.acta.snus.ZR20240170.
DFT study on enantiomerism of calcium diatomic valine complexes (Val·Ca2+) in physiological environment
The enantiomerism mechanism of chiral enantiomers of calcium diatomic valine (Val·Ca
2+
) was studied by using the hybrid exchange functional method of M06-2X and MN15 based on DFT (density functional theory) and SMD model method with self-consistent reaction field theory under physiological environment [(aqueous liquid phase, 310.15 K and 1.013×105 Pa (1 standard atmosphere)]. The observations on reaction channels found that the enantiomerism of Val·Ca
2+
can be achieved by using carbonyl O or amino N as H proton transfer bridge. The energy diagram calculation of stagnation point in enantiomerism process showed that the enantiomerism process of proton H using N atom as bridge migration has advantages. Under the effect of water polarity and water molecu
les (clusters), the energy barrier of velocity determination step of the dominant reaction channel is between 118.6 and 121.9 kJ/mol. The results show that the enantiomerism rate of calcium diatomic valine complexes is very slow in physiological environment, and it is safe to supplement calcium bivalent ion and valine in living organisms.
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