Reduction to the Simplest - The Complexity of Minimalistic Heteropolymer Models

TL;DR

This paper demonstrates that simplified heteropolymer models like lattice HP and off-lattice AB can efficiently classify folding behaviors, revealing thermodynamic properties and folding pathways similar to real proteins.

Contribution

It introduces a minimalistic modeling approach that reduces computational complexity while capturing key folding characteristics of heteropolymers.

Findings

Simplified models classify characteristic folding behaviors.

Thermodynamic properties of long sequences are systematically analyzed.

Folding pathways resemble realistic protein folding paths.

Abstract

Simple coarse-grained hydrophobic-polar models for heteropolymers as the lattice HP and the off-lattice AB model allow a general classification of characteristic behaviors for hydrophobic-core based tertiary folding. The strongly reduced computational efforts enable one to reveal systematically the thermodynamic properties of comparatively long sequences in a wide temperature range of conformational activity. Based on a suitable cooperativity parameter, characteristic folding channels and free-energy landscapes, which have strong similarities with realistic folding paths, can be analysed.