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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-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...
Conserved Binding Sites01:49

Conserved Binding Sites

Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Ligand Binding and Linkage00:49

Ligand Binding and Linkage

Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked.  In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence the...

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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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An interaction-motif-based scoring function for protein-ligand docking.

Zhong-Ru Xie1, Ming-Jing Hwang

  • 1Institute of Biomedical Informatics, National Yang-Ming University, Taipei, Taiwan.

BMC Bioinformatics
|June 8, 2010
PubMed
Summary
This summary is machine-generated.

A new network-based scoring function, MotifScore, transforms protein-ligand interactions into geometric networks. This approach identifies recurring network motifs to score molecular docking solutions effectively, offering an alternative to traditional energy-based methods.

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Area of Science:

  • Computational chemistry
  • Structural biology
  • Bioinformatics

Background:

  • Scoring functions are crucial for molecular docking accuracy.
  • Conventional methods sum energy terms for pairwise interactions.
  • A novel approach transforms interactions into 3D geometric networks.

Purpose of the Study:

  • To develop a novel, non-energy-based scoring function for molecular docking.
  • To utilize network motifs from protein-ligand interaction networks for scoring.
  • To assess the performance of the new scoring function against established methods.

Main Methods:

  • Protein-ligand interactions were converted into 3D geometric networks.
  • Recurring network substructures (motifs) were identified and selected.
  • The MotifScore function was developed based on the occurrences of these motifs.

Main Results:

  • The developed MotifScore function is non-energy-based.
  • Tested on a benchmark set, MotifScore achieved high accuracy in identifying near-native conformations.
  • 84% of top-scored docking conformations had root-mean-square deviations below 2.0 Å, comparable to energy-based functions.
  • Identified motifs capture complex, simultaneous interactions beyond simple pairwise contributions.

Conclusions:

  • MotifScore provides effective docking scores and represents a novel scoring approach.
  • It differs significantly from conventional energy-based scoring functions.
  • MotifScore introduces a new network-based strategy for molecular docking challenges.