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Related Concept Videos

Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...

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Split GFP-based fluorescent biosensors detect ER-Golgi membrane contact dynamics.

Ranran Mao1,2, Jiaqi Zhai1,2, Chunfang Tong1

  • 1Laboratory of Integrative Physiology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China.

Journal of Cell Science
|June 8, 2026
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Summary
This summary is machine-generated.

Researchers developed new fluorescent biosensors to visualize endoplasmic reticulum-Golgi contacts, crucial for cell communication. These tools reveal dynamic changes in these sites during cellular stress and development.

Keywords:
BiosensorEndoplasmic reticulumGolgiMembrane contact sitesSplit GFP

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Area of Science:

  • Cell Biology
  • Organelle Biology
  • Membrane Biology

Background:

  • Eukaryotic cells utilize membrane contact sites for organelle communication.
  • Endoplasmic reticulum (ER)-Golgi contacts are vital for lipid transport and protein sorting.
  • Understanding ER-Golgi contact regulation and function is limited by available research tools.

Purpose of the Study:

  • To develop novel genetically encoded biosensors for visualizing ER-Golgi contact sites.
  • To investigate the dynamics and regulation of ER-Golgi contacts in live cells.
  • To provide new tools for studying ER-Golgi interactions in various physiological and pathological conditions.

Main Methods:

  • Development of split GFP/YFP-based fluorescent biosensors.
  • Utilizing biosensors to selectively label and detect ER-Golgi contact sites.
  • Live-cell imaging to observe dynamic remodeling of ER-Golgi contacts.

Main Results:

  • Genetically encoded biosensors successfully label and detect ER-Golgi contact sites.
  • Biosensor detection is dependent on Golgi-enriched phosphatidylinositol 4-phosphate and Oxysterol-Binding Protein activity.
  • Dynamic remodeling of ER-Golgi contacts observed during cell division, ER stress, and in developing neurons.

Conclusions:

  • Novel fluorescent biosensors provide powerful tools for studying ER-Golgi interactions.
  • These biosensors enable real-time monitoring of ER-Golgi contact dynamics.
  • The tools facilitate investigation into the roles of ER-Golgi contacts in cellular processes and disease.