Long-Term Single-Molecule Tracking in Living Cells
Author Information
Author(s): Claudia Catapano, Marina S. Dietz, Julian Kompa, Soohyen Jang, Petra Freund, Kai Johnsson, Mike Heilemann
Primary Institution: Johann Wolfgang Goethe-University Frankfurt
Hypothesis
Can weak-affinity protein labeling extend observation times for single-molecule tracking in living cells?
Conclusion
The study demonstrates that using exchangeable HaloTag ligands allows for long-term single-molecule tracking in living cells without significant photobleaching.
Supporting Evidence
- The use of exchangeable HaloTag ligands allows for extended observation times of up to 30 minutes.
- Single-molecule tracking revealed non-uniform distributions of receptor mobility.
- Diffusion coefficients correlated with the ER nano-structure.
- EGFR activation was monitored directly in living cells.
Takeaway
This study shows a new way to watch proteins in living cells for a long time without them disappearing from view.
Methodology
The study used exchangeable HaloTag ligands for single-particle tracking of membrane proteins in living cells.
Limitations
The study primarily focuses on specific protein interactions and may not generalize to all membrane proteins.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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