Cited by 29Protein Structure and DynamicsEnzyme Structure and FunctionRNA and protein synthesis mechanisms

Contact Potential for Structure Prediction of Proteins and Protein Complexes from Potts Model

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Anishchenko, Ivan, Kundrotas, Petras J., Vakser, Ilya A.·2018·Biophysical Journal

Abstract

The energy function is the key component of protein modeling methodology. This work presents a semianalytical approach to the development of contact potentials for protein structure modeling. Residue-residue and atom-atom contact energies were derived by maximizing the probability of observing native sequences in a nonredundant set of protein structures. The optimization task was formulated as an inverse statistical mechanics problem applied to the Potts model. Its solution by pseudolikelihood maximization provides consistent estimates of coupling constants at atomic and residue levels. The best performance was achieved when interacting atoms were grouped according to their physicochemical properties. For individual protein structures, the performance of the contact potentials in distinguishing near-native structures from the decoys is similar to the top-performing scoring functions. The potentials also yielded significant improvement in the protein docking success rates. The potentials recapitulated experimentally determined protein stability changes upon point mutations and protein-protein binding affinities. The approach offers a different perspective on knowledge-based potentials and may serve as the basis for their further development.

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Crossref · 10.1016/j.bpj.2018.07.035

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  • AF2 model_1_ptm is a fine-tuned version of model_1 that predicts the TMscore and alignment errors.

    “The second model, model_1_ptm, is a fine-tuned version of model_1 that predicts the TMscore52 and alignment errors16.”

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Authors
Anishchenko, I., Kundrotas, P. J., & Vakser, I. A.
Affiliations
University of Kansas (US)
Corresponding author
  • Kundrotas, Petras J.
  • Vakser, Ilya A.
Venue
Biophysical Journal
Publisher
Elsevier BV
Published
2018-09
Volume
115
Issue
5
Pages
809-821
ISSN
0006-3495 (ISSN-L)
OpenAlex
W2886522305
Cited by
29
References
97
Citations by year
2026: 3 · 2025: 1 · 2024: 1 · 2023: 1 · 2022: 8 · 2021: 9 · 2020: 2 · 2019: 3 · 2017: 1
FWCI
1.25
Type
journal article
Language
en
Open access
Locations
  • Biophysical Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (R01GM074255)
  • National Science Foundation (DBI1262621, DBI1565107)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
Keywords
contact potential difference, protein structure prediction, Potts model, knowledge-based potentials, protein complexes, protein docking, protein-protein binding affinity, residue-residue contacts, decoy discrimination
MeSH terms
Models, Molecular, Protein Conformation, Proteins, Thermodynamics, Likelihood Functions, Point Mutation, Protein Stability

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