Thermodynamics and Kinetics of a Go Proteinlike Heteropolymer Model with Two-State Folding Characteristics

TL;DR

This study uses Monte Carlo simulations to analyze a simplified protein-like heteropolymer model, revealing that it exhibits two-state folding behavior driven mainly by hydrophobic interactions, similar to real proteins.

Contribution

It demonstrates that a coarse-grained Go-like heteropolymer model can replicate key thermodynamic and kinetic features of protein folding, including two-state behavior.

Findings

The model exhibits two-state folding with a single free-energy barrier.

Folding is primarily driven by hydrophobic interactions.

Realistic protein folding features are captured in a simplified model.

Abstract

We present results of Monte Carlo computer simulations of a coarse-grained hydrophobic-polar Go-like heteropolymer model and discuss thermodynamic properties and kinetics of an exemplified heteropolymer, exhibiting two-state folding behavior. It turns out that general, characteristic folding features of realistic proteins with a single free-energy barrier can also be observed in this simplified model, where the folding transition is primarily driven by the hydrophobic force.