Out-of-Equilibrium Biophysical Chemistry: The Case for Multidimensional, Integrated Single-Molecule Approaches

Area of Science:

• Biophysics
• Molecular Biology
• Biochemistry

Background:

• Out-of-equilibrium processes are fundamental to life, driving molecular functions like enzyme catalysis and motor protein activity.
• Biological macromolecules exist in dynamic conformational ensembles, essential for function but challenging to study.
• The relationship between structure, dynamics, and function in non-equilibrium biological systems is complex.

Purpose of the Study:

• To highlight the limitations of current experimental techniques in probing biomolecular function.
• To advocate for a revised approach to studying out-of-equilibrium biomolecular dynamics.
• To propose integrated experimental and computational strategies for a deeper understanding.

Main Methods:

• Exploration of challenges in state-of-the-art experimental techniques.
• Discussion of the necessity for advanced molecular dynamics simulations.
• Proposal for integrated single-molecule multiparametric force-fluorescence instruments.

Main Results:

• Current methods face significant challenges in quantifying the dynamics of out-of-equilibrium biomolecules.
• Existing models struggle to capture the complex, evolving energy landscapes of these systems.
• A need exists for novel methodologies to bridge the gap between molecular dynamics and biological function.

Conclusions:

• Revisiting how we probe and model functional out-of-equilibrium biomolecular dynamics is crucial.
• Integrated single-molecule force-fluorescence instruments offer a promising avenue.
• Advanced molecular dynamics simulations are essential for deciphering structure-dynamics-function relationships.