Related Experiment Video
Updated: Jan 31, 2026
11:40
Characterization of Neuronal Lysosome Interactome with Proximity Labeling Proteomics
Published on: June 23, 2022
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Mapping the Ku Interactome Using Proximity-Dependent Biotin Identification in Human Cells.
Sanna Abbasi1, Caroline Schild-Poulter1
1Robarts Research Institute and Department of Biochemistry, Schulich School of Medicine and Dentistry , University of Western Ontario , London , Ontario N6A 5B7 , Canada.
Journal of Proteome Research
|December 27, 2018
Summary
The Ku heterodimer (Ku70/Ku80) interacts with numerous proteins beyond DNA repair. This study reveals novel interactions, expanding our understanding of Ku
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- The Ku heterodimer (Ku70/Ku80) is crucial for DNA double-strand break repair.
- Ku's involvement in other cellular processes is less understood.
- The full scope of Ku protein interactions remains undetermined.
Purpose of the Study:
- To comprehensively identify proteins interacting with the Ku heterodimer.
- To explore Ku's functional roles beyond DNA repair.
- To characterize the Ku protein interaction landscape.
Main Methods:
- Proximity-dependent biotin identification (BioID) in HEK293 cells.
- Affinity purification coupled to mass spectrometry (AP-MS).
- Analysis performed in the absence of induced DNA damage.
Main Results:
- BioID identified ~250 nuclear proteins, including known Ku interactors (MRE11A, WRN, NCOA6).
- AP-MS identified ~50 candidate proteins.
- Novel interactors suggest Ku involvement in RNA metabolism, chromatin remodeling, and microtubule dynamics.
Conclusions:
- This study provides the first comprehensive characterization of the Ku protein interaction network.
- Identified interactions expand the known functions of the Ku complex.
- Reveals potential new roles for Ku in diverse cellular processes.
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