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Related Concept Videos

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...
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

SDOCK: a global protein-protein docking program using stepwise force-field potentials.

Changsheng Zhang1, Luhua Lai

  • 1Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular engineering, Peking University, Beijing, China.

Journal of Computational Chemistry
|May 28, 2011
PubMed
Summary
This summary is machine-generated.

A new protein-protein docking program, SDOCK, uses force field potentials for scoring, outperforming FFT-based methods. It identifies near-native protein complexes, offering binding free energy profiles for analysis.

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Area of Science:

  • Computational Biology
  • Structural Biology
  • Biophysics

Background:

  • Fast Fourier Transform (FFT) methods limit scoring functions in protein-protein docking.
  • Force field potentials effectively model biological macromolecule energy landscapes.

Purpose of the Study:

  • Develop a novel protein-protein docking program, SDOCK, utilizing force field potentials.
  • Enhance scoring functions for global protein-protein docking processes.

Main Methods:

  • Incorporated van der Waals potential, geometric collision, screened electrostatic potential, and Lazaridis-Karplus desolvation energy into the scoring function.
  • Generated stepwise potentials from continuous forms to handle structural flexibility.
  • Optimized atom solvation parameters and potential term weights using a 142-case docking test set.

Main Results:

  • SDOCK slightly outperformed ZDOCK3.0, a well-known FFT-based global docking program.
  • Achieved at least one near-native solution in the top 100 for 52.8% of the 142 tested cases.
  • Found near-native solutions within the top 350 for all six blind testing cases (CAPRI rounds 13-18).

Conclusions:

  • SDOCK offers an effective alternative to FFT-based methods for global protein-protein docking.
  • Provides global binding free energy surface profiles for further analysis.
  • Demonstrates comparable efficiency to other FFT-based docking programs.