Imaging beads-retained prey assay for rapid and quantitative protein-protein interaction.
Imaging beads-retained prey assay for rapid and quantitative protein-protein interaction.
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DOI:
10.1371/journal.pone.0059727
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Lu L
中科院分区:
文献类型:
--
作者:
Zhou Y;Hong W;Lu L
Conventional Western blot based pull-down methods involve lengthy and laborious work and the results are generally not quantitative. Here, we report the imaging beads-retained prey (IBRP) assay that is rapid and quantitative in studying protein-protein interactions. In this assay, the bait is immobilized onto beads and the prey is fused with a fluorescence protein. The assay takes advantage of the fluorescence of prey and directly quantifies the amount of prey binding to the immobilized bait under a microscope. We validated the assay using previously well studied interactions and found that the amount of prey retained on beads could have a relative linear relationship to both the inputs of bait and prey. IBRP assay provides a universal, fast, quantitative and economical method to study protein interactions and it could be developed to a medium- or high-throughput compatible method. With the availability of fluorescence tagged whole genome ORFs in several organisms, we predict IBRP assay should have wide applications.
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