A Refined PH-dependent Coarse-grained Model for Peptide Structure Prediction in Aqueous Solution

Overview

Journal Front Bioinform

Specialty Biology

Date 2023 Feb 2

PMID 36727106

Authors

Pierre Tuffery

Philippe Derreumaux

Affiliations

Soon will be listed here.

Abstract

Peptides carry out diverse biological functions and the knowledge of the conformational ensemble of polypeptides in various experimental conditions is important for biological applications. All fast dedicated softwares perform well in aqueous solution at neutral pH. In this study, we go one step beyond by combining the Debye-Hückel formalism for charged-charged amino acid interactions and a coarse-grained potential of the amino acids to treat pH and salt variations. Using the PEP-FOLD framework, we show that our approach performs as well as the machine-leaning AlphaFold2 and TrRosetta methods for 15 well-structured sequences, but shows significant improvement in structure prediction of six poly-charged amino acids and two sequences that have no homologous in the Protein Data Bank, expanding the range of possibilities for the understanding of peptide biological roles and the design of candidate therapeutic peptides.

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