LIU Jun,TANG Xiaowen,PAN Yu,et al.Theoretical study on the optical isomerization of proline catalyzed by hydroxyl anion (water clusters) in aqueous-liquid environment[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(04):85-94.
LIU Jun,TANG Xiaowen,PAN Yu,et al.Theoretical study on the optical isomerization of proline catalyzed by hydroxyl anion (water clusters) in aqueous-liquid environment[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(04):85-94. DOI: 10.13471/j.cnki.acta.snus.2020C023.
Theoretical study on the optical isomerization of proline catalyzed by hydroxyl anion (water clusters) in aqueous-liquid environment
-Pro) is investigated by using the M06-2X and MN15 methods of density functional theory and the SMD model method of self-consistent reaction field theory. Firstly, the reaction channels of
S
-Pro optically isomerism are investigated after
S
-Pro isomerized the neutral imino acids,
α
-H is extracted by hydroxyl anion (water clusters), and the proton of water molecule(clusters) is extracted by proline-carbon anion. Then, the reaction channels of
S
-Pro optically isomerism are investigated, in which
α
-H of
S
-Pro is directly extracted by hydroxyl anion (water clusters) and the proton of water molecule (clusters) is extracted by proline-carbon anion. The calculation of the potential energy surface shows that the channel of
α
-H extraction by hydroxyl anion (water clusters) is the most advantageous after
S
-Pro isomerized the neutral imino acids, and the free energy barrier of the rate-determining step is between 46. 9 and 59. 1 kJ·mol
-1
. The reaction channel of the hydroxyl anion water molecule clusters directly extracting the
α
-H of amphoteric
S
-Pro is the inferior channel, and the free energy barrier of the rate-determining step is 70.8 kJ·mol
-1
. The results show that the racemization of proline would proceed gently in alkaline environment.
ULRICH E, GERHARD S, RUDOLF W. New type of asymmetric cyclization to optically active steroid CD partial structures[J]. Angewandte Chemie International Edition, 1971, 10(7): 496-497.
KENJI H, AKIKO M, KIYOSHI Z. D-amino acids in mammals and their diagnostic value [J]. Journal of Chromatography B, 2002, 781(1/2): 73-91.
NORIKO F. D-Amino acids in living higher organisms[J]. Origins of Life and Evolution of the Biosphere, 2002, 32(1):103-127.
HAMASE K, INOUE T, MORIKAWA A, et al. Determination of free D-proline and D-leucine in the brains of mutant mice lacking D-amino acid oxidase activity[J]. Analytical Biochemistry, 2001, 298(2):253-258.
TONG H,LIU Y F, YAN H Y,et al. Theoretical Investigations of the chiral transition of serine and the role of water, hydroxyl radical and hydroxide ion[J]. New Journal of Chemistry, 2019, 43:12340-12350.
WANG Y, VERMA P, ZHANG L, et al. M06-SX screened-exchange density functional for chemistry and solid-state physics[J]. Proceedings of the National Academy of Sciences of the United States of America, 2020, 117(5): 2294-2301.
MARENICH A V, CRAMER C J, TRUHLAR D G. Universal solvation model based on solute electron density and on a continuum model of the solvent defined by the bulk dielectric constant and atomic surface tensions [J]. The Journal of Physical Chemistry B, 2009, 113(18): 6378-6396.
GARRETT B C, TRUHLAR D G. Criterion of minimum state density in the transition state theory of bimolecular reactions [J]. The Journal of Chemical Physics, 1979, 70(4): 1593-1598.
HRATCHIAN H P, SCHLEGEL H B. Using hessian updating to increase the efficiency of a hessian based predictor-corrector reaction path following method[J]. Journal of Chemical Theory and Computation, 2005, 1: 61-69.
YU H S, HE X, LI S L, et al. MN15: A Kohn-Sham global-hybrid exchange-correlation density functional with broad accuracy for multi-reference and single-reference systems and noncovalent[J]. Chemical Science,2016, 7: 5032.
FRISCH M J, TRUCKS G W, SCHLEGEL H B, et al. Gaussian 16 Revision C.01[CP]. Pittsburgh USA: Gaussian, Inc, 2019.
GORB L,LESZCZYNSKI J. Intramolecular proton transfer in mono- and dihydrated tautomers of guanine: An ab initio post hartree-fock study[J]. Journal of the American Chemical Society, 1998, 120: 5024-5032.