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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...
Protein Organization01:24

Protein Organization

Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence.
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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Related Experiment Video

Updated: May 20, 2026

Modeling Ligands into Maps Derived from Electron Cryomicroscopy
09:30

Modeling Ligands into Maps Derived from Electron Cryomicroscopy

Published on: July 19, 2024

Modeling regionalized volumetric differences in protein-ligand binding cavities.

Brian Y Chen1, Soutir Bandyopadhyay

  • 1Department of Computer Science and Engineering, Lehigh University, Bethlehem, PA, USA. chen@cse.lehigh.edu.

Proteome Science
|July 5, 2012
PubMed
Summary

We developed a geometric algorithm and statistical models to identify key structural differences in protein-ligand binding sites. These methods reveal subtle shape variations that significantly impact protein binding specificity.

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Analyzing Protein Architectures and Protein-Ligand Complexes by Integrative Structural Mass Spectrometry
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Analyzing Protein Architectures and Protein-Ligand Complexes by Integrative Structural Mass Spectrometry

Published on: October 15, 2018

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Last Updated: May 20, 2026

Modeling Ligands into Maps Derived from Electron Cryomicroscopy
09:30

Modeling Ligands into Maps Derived from Electron Cryomicroscopy

Published on: July 19, 2024

Analyzing Protein Architectures and Protein-Ligand Complexes by Integrative Structural Mass Spectrometry
07:33

Analyzing Protein Architectures and Protein-Ligand Complexes by Integrative Structural Mass Spectrometry

Published on: October 15, 2018

Area of Science:

  • Structural Biology
  • Computational Biology
  • Biochemistry

Background:

  • Understanding protein-ligand binding specificity is crucial for drug discovery and molecular mechanism elucidation.
  • Identifying subtle structural determinants of binding specificity can be challenging for human experts.
  • Analysis of multiple protein structures is often required to uncover significant binding site variations.

Purpose of the Study:

  • To present a novel geometric algorithm and statistical models for identifying significant structural differences in protein-ligand binding cavities.
  • To provide computational tools to aid in the discovery of subtle mechanisms underlying protein-ligand binding specificity.
  • To analyze protein-ligand binding sites in specific protein families to validate the developed methods.

Main Methods:

  • Development of a geometric algorithm to analyze structural differences in binding cavities.
  • Implementation of two statistical models to assess the significance of observed structural variations.
  • Application of the methods to sequentially nonredundant structural representatives of serine proteases and the enolase superfamily.

Main Results:

  • Statistically significant structural variations identified using the methods corresponded to experimentally established determinants of specificity.
  • The analysis successfully pinpointed regions within cavities where minor shape differences correlate with altered binding specificity.
  • The approach demonstrated effectiveness in uncovering subtle yet significant structural features influencing protein-ligand interactions.

Conclusions:

  • The developed geometric algorithm and statistical models are effective tools for identifying significant structural differences in protein-ligand binding cavities.
  • These computational methods can reveal subtle structural variations that determine protein binding specificity, complementing expert visual inspection.
  • The findings highlight the importance of analyzing localized regions within binding sites to understand specificity determinants.