Computing Reaction Pathways of Rare Biomolecular Transitions using Atomistic Force-Fields.

Area of Science:

• Computational Biology
• Biophysics
• Biochemistry

Background:

• Large biomolecules undergo complex conformational transitions.
• Simulating these transitions with traditional methods like molecular dynamics (MD) is computationally intensive.
• Accurate reaction pathway computation is crucial for understanding biomolecular function.

Purpose of the Study:

• To review the development and validation of the Dominant Reaction Pathway (DRP) method.
• To demonstrate the DRP method's capability in studying complex and rare biomolecular reactions.
• To highlight the DRP method's advantages over plain MD simulations for large systems.

Main Methods:

• The Dominant Reaction Pathway (DRP) method, an approximate variational scheme.
• Utilizing realistic all-atom force fields for simulations.
• Validation against protein folding simulations from DE-Shaw group using Anton supercomputer.

Main Results:

• The DRP method is a viable tool for computing reaction pathways in large biomolecules (~10^3 amino acids).
• DRP method shows good agreement with results from extensive MD simulations.
• DRP successfully studied complex and rare reactions intractable for plain MD.

Conclusions:

• The Dominant Reaction Pathway (DRP) method is a powerful computational tool for studying biomolecular conformational changes.
• DRP offers a significant advancement for investigating complex and rare events in large biomolecules.
• This method extends the reach of computational studies in biophysics and biochemistry.