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Related Concept Videos

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...
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...
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...
Molecular Models02:00

Molecular Models

Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
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...

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Related Experiment Video

Updated: Jul 10, 2026

Incorporating Target Protein Structure Flexibility and Dynamics in Computational Drug Discovery Using Ensemble-Based Docking Analysis
08:49

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

Published on: June 20, 2025

pso@autodock: a fast flexible molecular docking program based on Swarm intelligence.

Vigneshwaran Namasivayam1, Robert Günther

  • 1Faculty of Biosciences, Pharmacy and Psychology, Institute of Biochemistry, University of Leipzig, D-04103 Leipzig, Germany.

Chemical Biology & Drug Design
|November 8, 2007
PubMed
Summary

pso@autodock offers fast and accurate molecular docking for drug discovery. This new tool significantly speeds up the process while maintaining high-quality results for flexible ligand interactions.

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Application of I TASSER, trRosetta, UCSF Chimera, HADDOCK server, and HEX loria for De Novo and In Silico Design of Proteins
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Application of I TASSER, trRosetta, UCSF Chimera, HADDOCK server, and HEX loria for De Novo and In Silico Design of Proteins

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Related Experiment Videos

Last Updated: Jul 10, 2026

Incorporating Target Protein Structure Flexibility and Dynamics in Computational Drug Discovery Using Ensemble-Based Docking Analysis
08:49

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

Published on: June 20, 2025

Application of I TASSER, trRosetta, UCSF Chimera, HADDOCK server, and HEX loria for De Novo and In Silico Design of Proteins
05:08

Application of I TASSER, trRosetta, UCSF Chimera, HADDOCK server, and HEX loria for De Novo and In Silico Design of Proteins

Published on: July 8, 2025

Area of Science:

  • Computational chemistry
  • Drug discovery
  • Bioinformatics

Background:

  • Molecular docking is crucial for identifying potential therapeutics by predicting drug-target interactions.
  • Current methods often face limitations in speed and accuracy, especially with flexible ligands.

Purpose of the Study:

  • To introduce pso@autodock, a novel tool for rapid and flexible molecular docking.
  • To enhance the efficiency of virtual screening and drug-target interaction studies.

Main Methods:

  • Development of pso@autodock based on the autodock program.
  • Implementation of novel Particle Swarm Optimization (PSO) algorithms: varCPSO and varCPSO-ls.
  • Testing on protein-ligand complexes with highly flexible ligands.

Main Results:

  • pso@autodock achieved successful docking of a 23-rotatable bond ligand in 10% of autodock's computing time (rmsd = 0.87 Å).
  • Outperformed other docking programs (gold, dock, flexx, autodock, sodock) by achieving the smallest rmsd values in 12 out of 37 complexes.
  • Demonstrated an average rmsd of 1.4 Å, significantly lower than the >2.0 Å average of other programs.

Conclusions:

  • pso@autodock is a highly efficient program for flexible molecular docking.
  • The tool offers significant improvements in both speed and quality for virtual screening and peptide-protein docking studies.