Liposome Binding Assay
Liposome Binding Assay - Related Videos
03:54
Monitoring B Cell Activation with Antigenic Liposomes using a Calcium-Flux Assay
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2025
This video showcases the assessment of B cell activation through the utilization of antigenic liposomes. B cells treated with calcium-sensitive Indo-1 dye are distinguished using flow cytometry, and their violet-to-blue fluorescence ratio is analyzed. As the cells encounter antigenic liposomes, it triggers B cell activation through calcium influx, progressively enhancing the violet-to-blue fluorescence signal ratio over time.
10:28
Expression, Purification, and Liposome Binding of Budding Yeast SNX-BAR Heterodimers
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Cited by 2 •
2019
Here, we present a workflow for the expression, purification and liposome binding of SNX-BAR heterodimers in yeast.
04:05
Competition Binding Assay to Study Competing GTPase-Binding Protein Partners
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2025
This video demonstrates a competition assay to study GTPase-binding protein partners. Utilizing nucleotide-bound GTPase protein immobilized on magnetic beads, the competitive binding between two interacting protein partners for the same binding site on the GTPase can be studied to assess the binding affinities of the protein partners.
09:03
Giant Liposome Preparation for Imaging and Patch-Clamp Electrophysiology
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Cited by 23 •
2013
Reconstituting functional membrane proteins into giant liposomes of defined composition is a powerful approach when combined with patch-clamp electrophysiology. However, conventional giant liposome production may be incompatible with protein stability. We describe protocols for producing giant liposomes from pure lipids or small liposomes containing ion channels.
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.
FAQs
Lipid composition can reveal whether a molecule associates selectively with particular membrane environments. By comparing the molecule’s distribution across liposome preparations containing different lipid compositions, researchers can identify lipid specificity rather than treating membrane association as uniform. This makes the composition of the model membrane an important variable for interpreting biochemical interactions.
Ionic strength can regulate how strongly a molecule associates with the lipid membrane model. Holding this condition constant supports comparisons between experiments, while deliberately changing it can show whether binding is sensitive to the surrounding chemical environment. Such comparisons help identify factors that promote or reduce membrane association under defined biochemical conditions.
The relative amount of test molecule found with the liposome fraction versus the unbound fraction provides a measure of membrane association under the selected conditions. A distribution shifted toward the membrane-bound fraction is consistent with stronger association in that experiment. Comparing these distributions across conditions helps characterize binding affinity and its regulation.
The workflow combines purified liposomes with the protein or other test molecule under controlled conditions, allows their association to be assessed, and then separates membrane-bound material from unbound material. Researchers measure the molecule in the resulting fractions and compare its distribution. This sequence connects experimental conditions with a direct readout of membrane association.
A Liposome Binding Assay may separate the fractions by sedimentation, filtration, or chromatography. Although these approaches use different separation formats, each is used to distinguish material associated with liposomes from material remaining unbound. Measuring the test molecule in both fractions then supplies the distribution needed to evaluate membrane binding under the chosen conditions.
This assay helps examine membrane-protein interactions relevant to signaling, trafficking, enzymatic activity, and membrane remodeling. Researchers can use the results to connect lipid specificity, binding affinity, and environmental regulation with these broader biochemical processes. The liposome model provides a controlled context for testing how membrane association may influence molecular function.