Quantum Vibrational Spectroscopy of Explicitly Solvated Thymidine in Semiclassical Approximation

Area of Science:

• Computational Chemistry
• Biophysics
• Quantum Dynamics

Background:

• Simulating biological molecules in solution requires accounting for quantum effects and explicit solvent interactions.
• Accurate modeling of solvation is crucial for understanding biological processes.

Purpose of the Study:

• To develop and apply a computational method for spectroscopy simulations of solvated biological species.
• To investigate the solvation of thymidine nucleoside in water and N,N-dimethylformamide using quantum dynamics.

Main Methods:

• Interfacing a divide-and-conquer semiclassical initial value representation molecular dynamics approach with the AMOEBABIO18 force field.
• Performing simulations on systems with up to 2476 atoms, including thymidine in two polar solvents.

Main Results:

• The study successfully reproduces experimental observations of thymidine's differential behavior in water and N,N-dimethylformamide.
• The computational method demonstrates the feasibility of studying quantum effects in explicitly solvated biological systems.

Conclusions:

• Semiclassically approximate quantum dynamical studies of explicitly solvated biological systems are computationally feasible and provide valuable insights.
• While the method shows promise, quantitative accuracy is limited by the classical force field employed.