Binding Inhibition Analysis
Binding Inhibition Analysis - Related Videos
07:53
Actin Co-Sedimentation Assay; for the Analysis of Protein Binding to F-Actin
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Cited by 18 •
2008
Proteins bind to filamentous actin (F-actin) through distinct actin binding modules. In this video we demonstrate the procedure of actin co-sedimentation, which is an in vitro assay routinely used to analyze proteins or specific domains that bind F-actin.
02:58
Immunoblot Analysis of Apoptosis Inhibition in Host Cells Expressing an Antiapoptotic Bacterial Protein
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2026
Source: Berens, C. et al. Applying an Inducible Expression System to Study Interference of Bacterial Virulence Factors with Intracellular Signaling. J. Vis. Exp. (2015)This video demonstrates the use of immunoblotting to assess apoptosis inhibition by the bacterial effector protein CaeB in human cells. It outlines the steps for detecting apoptotic markers following doxycycline-induced expression of pro-apoptotic proteins in host cells expressing the effector.
00:49
Ligand Binding and Linkage
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2020
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...
07:59
A High Throughput MHC II Binding Assay for Quantitative Analysis of Peptide Epitopes
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Cited by 20 •
2014
Biochemical assays with recombinant human MHC II molecules can provide rapid, quantitative insights into immunogenic epitope identification, deletion, or design. Here, a peptide-MHC II binding assay scaled to 384-well plates is described. This cost effective format should prove useful in the fields of protein deimmunization and vaccine design and development.
09:43
Identification of Plant Ice-binding Proteins Through Assessment of Ice-recrystallization Inhibition and Isolation Using Ice-affinity Purification
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Cited by 5 •
2017
This paper outlines the identification of ice-binding proteins from freeze-tolerant plants through the assessment of ice-recrystallization inhibition activity and subsequent isolation of native IBPs using ice-affinity purification.
FAQs
Competition is inferred by tracking the labeled binding signal while the concentration of an unlabeled molecule increases. If the inhibitor occupies or otherwise limits access to the same binding partner, the signal decreases relative to a condition with less inhibitor. This competitive pattern connects the measured assay response to molecular recognition in immune or infection-related systems.
The concentration producing a defined inhibition level provides a standardized way to express inhibitory potency. Rather than relying only on whether binding decreases, researchers can compare the concentrations required to reach the same reduction in signal. This supports comparisons among antibodies, pathogen attachment inhibitors, or experimental conditions when evaluating how strongly they interfere with a binding interaction.
Changes in the binding signal across inhibitor concentrations can show whether a mutation or treatment alters an interaction. Researchers compare the resulting inhibition behavior with an appropriate reference condition, asking whether the tested change modifies susceptibility to blocking. In immunology and infection studies, this helps connect altered molecular recognition with differences in antibody activity, receptor interaction, or pathogen attachment.
A typical workflow mixes a labeled ligand, antigen, antibody, or receptor with the binding system and increasing concentrations of an unlabeled inhibitor. The assay then measures the binding signal at each inhibitor level and compares the pattern across concentrations. Researchers use the resulting reduction to identify competition and, when applicable, determine the concentration associated with a defined inhibition level.
It is useful when the research question concerns whether an antibody can prevent or reduce a binding interaction. By testing increasing concentrations of an unlabeled antibody or related inhibitor, investigators can compare blocking activity across antibodies or conditions. The resulting inhibition pattern provides a basis for evaluating immune recognition and identifying differences in interference with binding.
In infection research, the assay can evaluate molecules that inhibit pathogen attachment by measuring how effectively they reduce a relevant binding signal. It can also help characterize receptor-ligand interactions involved in infection and examine effects of mutations or treatments on binding. These outcomes support interpretation of infection mechanisms and assessment of therapeutic strategies.