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Near Simultaneous Laser Scanning Confocal and Atomic Force Microscopy Conpokal on Live Cells
Published on: August 11, 2020
High-Resolution Imaging of STIM/Orai Subcellular Localization Using Array Confocal Laser Scanning Microscopy.
Andras T Deak1,2, Benjamin Gottschalk1, Emrah Eroglu1
1Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria.
This study visualizes the dynamics of STIM1 and Orai1 proteins, key players in calcium entry, using fluorescent protein chimeras and advanced microscopy. It offers insights into their real-time subcellular movements during cellular calcium signaling.
Area of Science:
- Cell biology
- Biophysics
- Molecular imaging
Background:
- Fluorescent protein (FP) chimeras enable visualization and tracking of protein dynamics.
- Confocal laser scanning microscopy is ideal for live-cell imaging of FP-tagged proteins.
- Stromal-interacting molecule 1 (STIM1) and Orai1 are crucial for store-operated calcium entry (SOCE).
Purpose of the Study:
- To describe real-time monitoring of STIM1 and Orai1 subcellular dynamics.
- To investigate the behavior of STIM1 and Orai1 under resting and stimulated conditions.
- To utilize FP-tagged fusion proteins for live-cell imaging of SOCE components.
Main Methods:
- Construction and expression of fluorescent protein (FP) chimeras with STIM1 and Orai1.
- Live-cell imaging using array confocal laser scanning microscopy.
- Monitoring protein dynamics upon calcium mobilization from the endoplasmic reticulum (ER).
Main Results:
- Real-time visualization of STIM1 and Orai1 localization and movement.
- Observation of dynamic changes in STIM1 and Orai1 during SOCE.
- Quantification of subcellular dynamics of key SOCE proteins.
Conclusions:
- FP-tagged STIM1 and Orai1 allow effective real-time monitoring of SOCE dynamics.
- Confocal microscopy provides valuable insights into the subcellular behavior of these proteins.
- This approach facilitates the study of calcium signaling pathways in living cells.
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