A protein interaction free energy model based on amino acid residue contributions: Assessment of point mutation stability of T4 lysozyme.

ABSTRACT: Here we present a model to estimate the interaction free energy contribution of each amino acid residue of a given protein. Protein interaction energy is described in terms of per-residue interaction factors, μ. Multibody interactions are implicitly captured in μ through the combination of amino acid terms (γ) guided by local conformation indices (σ). The model enables construction of an interaction factor heat map for a protein in a given fold, allows prima facie assessment of the degree of residue-residue interaction, and facilitates a qualitative and quantitative evaluation of protein association properties. The model was used to compute thermal stability of T4 bacteriophage lysozyme mutants across seven sites. Qualitative assessment of mutational effects provides a straightforward rati

SUBMITTER: Williams LJ 

PROVIDER: S-EPMC7093156 | biostudies-literature | 2019 Mar-Jun

REPOSITORIES: biostudies-literature