Donor Acceptor Proteins
Donor Acceptor Proteins - Related Videos
04:26
FLIM-FRET Imaging for Characterization of Protein-Protein Interactions in Live Bacteria
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2025
The video describes the FLIM-FRET imaging technique to determine the protein-protein interaction in live bacteria expressing cytoplasmic proteins labeled with fluorescent proteins, a donor eGFP, and acceptor mCherry. The combined technique also allows the quantification of the interacting proteins.
07:17
Single Port Donor Nephrectomy
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Cited by 5 •
2011
Single port laparoscopic surgery is changing the standard of care in surgical care like nothing since the laparoscopic technique was introduced 20 years ago. We present out technique of single port donor nephrectomy using the Gelpoint device. We have successfully performed this surgery in 100 patients.
11:15
Imaging Protein-protein Interactions in vivo
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Cited by 5 •
2010
This protocol describes how to image protein-protein interactions using a FRET-based proximity assay.
03:32
Amplified Luminescent Proximity Homogeneous Assay: A Bead-Based Proximity Assay to Screen Small Molecules Inhibiting Protein-Protein Interactions
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2025
In this video, we demonstrate the amplified luminescent proximity homogeneous assay—a bead-based proximity assay. It utilizes homogeneously-sized acceptor and donor beads, immobilized with two proteins that tend to interact to screen potential small molecules inhibiting protein interactions.
10:20
Method for Identifying Small Molecule Inhibitors of the Protein-protein Interaction Between HCN1 and TRIP8b
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Cited by 6 •
2016
The interaction between HCN channels and their auxiliary subunit has been identified as a therapeutic target in Major Depressive Disorder. Here, a fluorescence polarization-based method for identifying small molecule inhibitors of this protein-protein interaction, is presented.
FAQs
FRET efficiency depends strongly on both the separation and relative orientation of the donor and acceptor proteins. Small changes in molecular arrangement can therefore alter the amount of excitation energy transferred. This sensitivity allows the reporter pair to reveal proximity-related changes during protein interactions or conformational movements that may not be apparent from static fluorescence alone.
After light excites the donor, nearby excitation energy can move nonradiatively to the acceptor. The acceptor therefore provides a second component whose response reflects the donor's molecular environment and proximity. Monitoring the resulting fluorescence changes helps convert an otherwise difficult-to-observe molecular arrangement into an optical measurement of a biological event.
A fluorescence change can report that the spatial relationship between the paired proteins has changed. Depending on the biological system, that change may reflect a protein interaction, a conformational shift, or intracellular signaling. Because the reporters respond to molecular proximity and arrangement, the optical signal can follow dynamic events rather than only provide a fixed structural observation.
The workflow begins with a paired donor and acceptor reporter system in the biological context being studied. Researchers illuminate the donor, allow any proximity-dependent energy transfer to occur, and monitor fluorescence from the reporter pair. Comparing the optical response across molecular states provides quantitative information about changes in interactions, conformation, proximity, or signaling.
They are useful when researchers need to follow molecular events inside living cells, particularly protein interactions, conformational changes, and intracellular signaling. The paired reporters translate changes in molecular proximity into fluorescence measurements, allowing dynamic processes to be monitored optically in their cellular context rather than examined only through a static endpoint.
Conventional imaging may show where fluorescent signals are present, but donor acceptor measurements can provide information about molecular proximity and changing relationships between paired proteins. This added sensitivity supports quantitative tracking of dynamic events that conventional imaging may not resolve directly, making the approach valuable for studying mechanisms rather than location alone.