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Ligand Binding Sites

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 Sites

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 Linkage

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...

Ligand Binding and Linkage

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...

The Equilibrium Binding Constant and Binding Strength

The Equilibrium Binding Constant and Binding Strength

The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:

Conserved Binding Sites

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...

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LigMatch: a multiple structure-based ligand matching method for 3D virtual screening.

Sarah L Kinnings¹, Richard M Jackson

¹Institute of Molecular and Cellular Biology and Astbury Centre for Structural Molecular Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom.

Journal of Chemical Information and Modeling

|August 19, 2009

Summary

This summary is machine-generated.

LigMatch, a new virtual screening method, excels at prioritizing compounds by comparing 3D structures. It outperforms existing methods and shows promise for scaffold hopping in drug discovery.

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Area of Science:

Computational chemistry
Structural biology
Drug discovery

Background:

Virtual screening (VS) is crucial for identifying potential drug candidates.
Existing VS methods have limitations in accuracy and scope.
3D structural comparison offers a promising avenue for improved VS.

Purpose of the Study:

To introduce and evaluate LigMatch, a novel 3D-based VS method.
To compare LigMatch's performance against established VS techniques.
To explore strategies for enhancing VS performance using template selection.

Main Methods:

Developed LigMatch, a VS method utilizing geometric hashing for 3D structural comparison.
Tested LigMatch on 13 protein targets from the Directory of Useful Decoys (DUD) dataset.
Investigated the impact of single versus multiple, diverse template ligands.

Main Results:

LigMatch significantly outperformed several widely used VS methods on the DUD targets.
Utilizing multiple, structurally diverse templates improved VS performance.
LigMatch demonstrated robustness, performing well even without 2D similarity to templates.

Conclusions:

LigMatch is a highly effective VS method, outperforming existing approaches.
Employing multiple diverse templates enhances VS accuracy.
LigMatch shows potential for scaffold hopping and robust drug discovery.