Bait Protein
Bait Protein - Related Videos
03:55
ELISA-Based Method to Analyze Interactions between Bait and Prey Proteins
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2025
This video describes an ELISA-based technique that detects protein-protein interactions between two proteins by measuring the binding of the second protein to the immobilized first protein. The bound second protein is detected using specific antibodies labeled with an enzyme, such as horseradish peroxidase.
12:36
A Protocol for Phage Display and Affinity Selection Using Recombinant Protein Baits
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Cited by 3 •
2014
Phage display is a powerful technique to capture proteins or protein moieties that interact with an immobilized molecule of interest. Once a decision of the type of phage cDNA library to create and screen has been made, the protocol described here permits efficient affinity selection leading to identification of interactors.
08:38
Genome-wide Protein-protein Interaction Screening by Protein-fragment Complementation Assay (PCA) in Living Cells
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Cited by 27 •
2015
Proteins interact with each other and these interactions determine in a large part their functions. Protein interaction partners can be identified at high-throughput in vivo using a yeast fitness assay based on the dihydrofolate reductase protein-fragment complementation assay (DHFR-PCA).
14:04
Split-Ubiquitin Based Membrane Yeast Two-Hybrid (MYTH) System: A Powerful Tool For Identifying Protein-Protein Interactions
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Cited by 54 •
2010
MYTH allows the sensitive detection of transient and stable interactions between proteins that are expressed in the model organism Saccharomyces cerevisiae. It has been successfully applied to study exogenous and yeast integral membrane proteins in order to identify their interacting partners in a high throughput manner.
07:42
In-vivo Detection of Protein-protein Interactions on Micro-patterned Surfaces
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Cited by 7 •
2010
This video shows experiments with subsequent analysis of protein-protein interactions by the use of micro-patterned surfaces. The approach offers the possibility to detect protein interactions in living cells and combines high throughput capabilities with the possibility to extract quantitative information.
FAQs
Binding specificity determines which prey molecules remain associated with the immobilized bait during isolation. Strongly selective interactions can help distinguish relevant partners from unrelated sample components, whereas broader binding patterns may reveal more extensive protein networks. Examining the recovered molecules therefore helps researchers evaluate both the bait’s molecular function and the specificity of its interactions.
An engineered purification tag provides a practical handle for handling the bait during an affinity-based assay. It supports purification and attachment to a solid support before the biological sample is added. This arrangement keeps the selected protein available for interaction studies and enables associated prey molecules to be isolated for subsequent analysis.
These approaches apply the same bait-based interaction principle in related experimental formats. Pull-down assays and affinity purification focus on capturing associated molecules from a biological sample, while related interaction screens can support broader characterization of binding relationships. The chosen format depends on whether the goal is to examine a protein complex, binding specificity, or network-level interactions.
A typical workflow begins by selecting and engineering the bait with a purification tag. Researchers then immobilize it on a solid support, incubate the support with a biological sample, and isolate molecules that remain associated with the bait. The recovered prey molecules are analyzed to characterize interaction partners and their possible molecular roles.
Captured prey molecules can identify candidate interaction partners and reveal components of a protein complex. Comparing the recovered molecules also provides information about binding specificity and the organization of protein networks. These results help connect a bait’s molecular interactions with cellular processes, signaling pathways, and mechanisms associated with disease.
Bait proteins are useful when researchers need to examine molecular associations rather than study an isolated protein alone. They support investigations of protein complexes, signaling pathways, molecular function, and disease mechanisms. By capturing associated molecules from biological samples, these assays provide an experimental route for mapping interaction networks and relating them to cellular behavior.