ArticlePhysical chemistry chemical physics : PCCP2022
Developing end-point methods for absolute binding free energy calculation using the Boltzmann-quasiharmonic model.
Article in Physical chemistry chemical physics : PCCP, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed, 6 citations in OpenAlex.
- Ligand Reorganization for End-Point Binding Free Energy Calculations: Identifying Preferred Poses of Fentanyls in the μ Opioid Receptor.Journal of chemical theory and computation · 2025Article
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- Elucidating the molecular determinants for binding modes of a third-generation HIV-1 integrase strand transfer inhibitor: Importance of side chain and solvent reorganization.bioRxiv : the preprint server for biology · 2023Article
- Potential effects of metal ion induced two-state allostery on the regulatory mechanism of add adenine riboswitch.Communications biology · 2022Article
- A dynamical view of protein-protein complexes: Studies by molecular dynamics simulations.Frontiers in molecular biosciences · 2022Article
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Authors and funding
5 authors at 3 institutions in 1 country.
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Abstract
Understanding the physical forces underlying receptor-ligand binding requires robust methods for analyzing the binding thermodynamics. In end-point binding free energy methods the binding free energy is naturally decomposable into physically intuitive contributions such as the solvation free energy and configurational entropy that can provide insights. Here we present a new end-point method called EE-BQH (Effective Energy-Boltzmann-Quasiharmonic) which combines the Boltzmann-Quasiharmonic model for configurational entropy with different solvation free energy methods, such as the continuum solvent PBSA model and the integral equation-based 3D-RISM, to estimate the absolute binding free energy. We compare EE-BQH with other treatments of configurational entropy such as Quasiharmonic models in internal coordinates (QHIC) and in Cartesian coordinates (QHCC), and Normal Mode analysis (NMA), by testing them on the octa acids host-guest complexes from the SAMPL8 blind challenge. The accuracies in the calculated absolute binding free energies strongly depend on the configurational entropy and solvation free energy methods used. QHIC and BQH yield the best agreements with the established potential of mean force (PMF) estimates, with
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