Inverse design of proteins with hydrophobic and polar amino acids

TL;DR

This paper presents a method for inverse protein design using a simplified two-amino-acid scheme, achieving around 75% success in identifying native residue types across twenty proteins, highlighting the approach's robustness.

Contribution

The study introduces a simplified two-amino-acid model for protein design, demonstrating high success rates and analyzing limitations due to coarse-graining of amino acid types.

Findings

Approximately 75% success in residue identification across proteins

Lower success for residues like alanine with high secondary structure roles

Simple lattice model reveals limitations of coarse-graining amino acids

Abstract

A two amino acid (hydrophobic and polar) scheme is used to perform the design on target conformations corresponding to the native states of twenty single chain proteins. Strikingly, the percentage of successful identification of the nature of the residues benchmarked against naturally occurring proteins and their homologues is around 75 % independent of the complexity of the design procedure. Typically, the lowest success rate occurs for residues such as alanine that have a high secondary structure functionality. Using a simple lattice model, we argue that one possible shortcoming of the model studied may involve the coarse-graining of the twenty kinds of amino acids into just two effective types.