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Related Concept Videos

Ligand Binding Sites02:40

Ligand Binding Sites

Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Ligand Binding Sites02:40

Ligand Binding Sites

Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Protein-Drug Binding: Mechanism and Kinetics01:16

Protein-Drug Binding: Mechanism and Kinetics

Protein-drug binding refers to the interaction between drugs and proteins within the body. This binding process can occur intracellularly, involving drug interactions with enzymes or receptors within cells, or extracellularly, involving plasma proteins in the blood.
Various forces drive these interactions, including hydrogen bonds, hydrophobic interactions, ionic bonds, electrostatic interactions, and van der Waals forces. These bonds enable drugs to bind to specific sites on proteins,...
Protein-protein Interfaces02:04

Protein-protein Interfaces

Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...
Protein-Protein Interfaces02:04

Protein-Protein Interfaces

Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...

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Incorporating Target Protein Structure Flexibility and Dynamics in Computational Drug Discovery Using Ensemble-Based Docking Analysis
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Incorporating Target Protein Structure Flexibility and Dynamics in Computational Drug Discovery Using Ensemble-Based Docking Analysis

Published on: June 20, 2025

Fast force field-based optimization of protein-ligand complexes with graphics processor.

Lennart Heinzerling1, Robert Klein, Matthias Rarey

  • 1Center for Bioinformatics, University of Hamburg, Bundesstr. 43, 20146 Hamburg, Germany.

Journal of Computational Chemistry
|August 23, 2012
PubMed
Summary
This summary is machine-generated.

We developed a novel GPU-based method to accelerate protein-ligand complex optimization, achieving over 100x speedup. This approach improves ligand pose accuracy, crucial for drug discovery.

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Last Updated: May 19, 2026

Incorporating Target Protein Structure Flexibility and Dynamics in Computational Drug Discovery Using Ensemble-Based Docking Analysis
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Published on: June 20, 2025

Realistic Membrane Modeling Using Complex Lipid Mixtures in Simulation Studies
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Published on: October 26, 2015

Area of Science:

  • Computational chemistry
  • Structural biology
  • Bioinformatics

Background:

  • Protein-ligand docking is vital for drug discovery.
  • Ligand pose optimization is a time-consuming bottleneck.
  • Molecular mechanics force fields are commonly used.

Purpose of the Study:

  • To develop a massively parallelized algorithm for protein-ligand complex optimization.
  • To leverage graphics processing units (GPUs) for faster computations.
  • To improve the accuracy of ligand pose prediction.

Main Methods:

  • Developed a novel GPU-accelerated algorithm for molecular mechanics-based optimization.
  • Customized the algorithm specifically for protein-ligand pose optimization.
  • Utilized the parallel processing capabilities of GPUs.

Main Results:

  • Achieved at least 100 times speedup compared to CPU-based optimization tools.
  • Demonstrated significant improvements in Root-Mean-Square Distance (RMSD) of ligand poses (up to 42%).
  • Overcame limitations of discretized conformation models.

Conclusions:

  • GPU acceleration offers a substantial performance enhancement for protein-ligand docking.
  • The novel method significantly reduces computational time for pose optimization.
  • Improved pose accuracy contributes to more reliable drug discovery predictions.