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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...
Structure-Activity Relationships and Drug Design01:28

Structure-Activity Relationships and Drug Design

Drug design is a dynamic field that involves discovering and developing new medications based on specific biological targets. This process heavily relies on structure-activity relationships (SAR) and quantitative structure-activity relationships (QSAR) to guide the design and optimization of efficient drugs.
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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...
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.
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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.
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Conserved Binding Sites01:49

Conserved Binding Sites

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Updated: Jun 4, 2026

Biosensor-based High Throughput Biopanning and Bioinformatics Analysis Strategy for the Global Validation of Drug-protein Interactions
08:31

Biosensor-based High Throughput Biopanning and Bioinformatics Analysis Strategy for the Global Validation of Drug-protein Interactions

Published on: December 1, 2020

Structure-based systems biology for analyzing off-target binding.

Lei Xie1, Li Xie, Philip E Bourne

  • 1Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, MC9743, 9500 Gilman Drive, La Jolla, CA 92093, USA.

Current Opinion in Structural Biology
|February 5, 2011
PubMed
Summary
This summary is machine-generated.

Off-target binding, where drugs interact with unintended proteins, is common and can cause side effects or enable new therapeutic uses. Understanding and predicting these interactions is crucial for drug development.

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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

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Last Updated: Jun 4, 2026

Biosensor-based High Throughput Biopanning and Bioinformatics Analysis Strategy for the Global Validation of Drug-protein Interactions
08:31

Biosensor-based High Throughput Biopanning and Bioinformatics Analysis Strategy for the Global Validation of Drug-protein Interactions

Published on: December 1, 2020

Incorporating Target Protein Structure Flexibility and Dynamics in Computational Drug Discovery Using Ensemble-Based Docking Analysis
08:49

Incorporating Target Protein Structure Flexibility and Dynamics in Computational Drug Discovery Using Ensemble-Based Docking Analysis

Published on: June 20, 2025

Area of Science:

  • Pharmacology
  • Biochemistry
  • Drug Discovery

Background:

  • Off-target binding occurs when a therapeutic molecule binds to unintended protein targets.
  • This phenomenon is increasingly recognized as common, impacting drug safety and efficacy.
  • It presents challenges for rational drug design but also opportunities for drug repositioning.

Purpose of the Study:

  • To investigate the prevalence and implications of off-target binding in drug development.
  • To explore methods for predicting off-target interactions on a proteome-wide scale.
  • To understand the systemic biological impact of off-target binding for predicting phenotypic outcomes.

Main Methods:

  • Proteome-wide analysis to identify potential off-target interactions.
  • Systematic investigation of small molecule-protein binding.
  • Computational and experimental approaches to predict biological system impact.

Main Results:

  • Off-target binding is a frequent occurrence in therapeutic interventions.
  • Identifying off-targets can reveal risks of adverse effects.
  • Predicting the consequences of off-target binding on biological systems is an ongoing challenge.

Conclusions:

  • Off-target binding is a significant factor in drug development, necessitating careful evaluation.
  • Understanding off-target interactions is key to mitigating risks and exploring new therapeutic applications.
  • Predictive models for off-target effects are advancing, aiming for comprehensive biological system understanding.