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Related Experiment Video

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Synthesizing Amino Acids Modified with Reactive Carbonyls in Silico to Assess Structural Effects Using Molecular Dynamics Simulations

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Extended Morse function model for angle-dependent hydrogen bond in protein-protein interactions.

Hwanho Choi¹, Hongsuk Kang, Hwangseo Park

¹Department of Bioscience and Biotechnology, Sejong University, 98 Kunja-Dong, Kwangjin-Ku, Seoul 143-747, Korea.

The Journal of Physical Chemistry. B

|February 10, 2010

Summary

This study introduces a new potential energy function for hydrogen bonds (HBs) crucial in protein-protein interactions. The function accurately models HB binding energies, improving computational models of protein complexes.

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Single-Molecule Measurement of Protein Interaction Dynamics Within Biomolecular Condensates

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Published on: January 5, 2024

Area of Science:

Computational chemistry
Biophysics
Structural biology

Background:

Hydrogen bonds (HBs) are vital for protein-protein interactions.
Accurate modeling of HBs is essential for understanding protein complex dynamics.

Purpose of the Study:

To develop a novel angle-dependent potential energy function for backbone-backbone, backbone-asparagine, and serine-backbone hydrogen bonds.
To improve the accuracy of modeling hydrogen bonds in protein-protein interactions.

Main Methods:

Utilized high-level density functional theory (DFT) calculations to optimize parameters.
Developed new angular variables (R(theta), R(phi)) for defining angular Morse functions.
Constructed the potential energy function as a product of radial and angular Morse functions.

Main Results:

The angular component of the new potential function significantly contributes to the total energy.
Calculated HB binding energies show strong agreement with high-level DFT results (R² = 0.82–0.85).

Conclusions:

The proposed angle-dependent potential energy function is suitable for modeling hydrogen bonds in protein-protein interactions.
This advancement can enhance the accuracy of computational simulations of protein complexes.