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Related Concept Videos

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...
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 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...
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...
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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Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions
06:50

Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions

Published on: January 26, 2024

Predicting small ligand binding sites in proteins using backbone structure.

Andrew J Bordner1

  • 1Mayo Clinic, 13400 East Shea Boulevard, Scottsdale, AZ 85259, USA. bordner.andrew@mayo.edu

Bioinformatics (Oxford, England)
|October 23, 2008
PubMed
Summary

SitePredict accurately predicts protein binding sites for metal ions and small molecules using machine learning. This computational tool aids in understanding protein function when experimental data is limited, even with low-resolution models.

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A Protocol for Computer-Based Protein Structure and Function Prediction

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Area of Science:

  • Computational Biology
  • Structural Bioinformatics
  • Machine Learning

Background:

  • Protein function relies on specific binding of metal ions and ligands.
  • Computational methods predict binding sites, especially when experimental data is scarce.
  • Structure-based methods can identify non-contiguous binding motifs, outperforming sequence-only approaches.

Purpose of the Study:

  • To develop and evaluate SitePredict, a machine learning method for predicting protein binding sites.
  • To assess the method's performance using various protein-ligand complexes and structural models.
  • To identify key features contributing to accurate binding site prediction.

Main Methods:

  • SitePredict utilizes Random Forest classifiers trained on residue properties.
  • Features include spatial clustering of residue types and evolutionary conservation.
  • The method was validated using cross-validation on known binding sites and tested on unbound structures.

Main Results:

  • SitePredict achieved high prediction accuracy (AUC ≥ 0.8) for diverse metal ions and small molecules.
  • Performance showed only a minor decrease on unbound protein structures.
  • Analysis identified key predictive features for each ligand type.

Conclusions:

  • SitePredict is an effective tool for predicting protein binding sites computationally.
  • The method demonstrates robustness across different structural states and protein types.
  • Predicted binding site data is publicly available for protein structures and homology models.