Related Experiment Video
Updated: May 16, 2026
08:38
Genome-wide Protein-protein Interaction Screening by Protein-fragment Complementation Assay (PCA) in Living Cells
Published on: March 3, 2015
[Protein complementation as tool for studying protein-protein interactions in living cells]
Molekuliarnaia Biologiia
|November 20, 2012
Summary
Studying protein complex interactions in vivo is crucial for understanding diseases. Reporter protein fragment complementation offers a powerful in vivo method for detecting these vital cellular interactions.
Area of Science:
- Cellular biology
- Biochemistry
- Molecular mechanisms
Context:
- Protein complexes are vital for cellular functions and disease.
- Current methods for studying protein interactions are often in vitro.
- In vivo methods are needed for more relevant biological insights.
Purpose:
- To highlight the importance of in vivo protein association studies.
- To introduce reporter protein fragment complementation as a key in vivo technique.
- To discuss the applications of protein complementation in biological research.
Summary:
- Protein complex association and degradation are fundamental to cellular processes and pathology.
- In vivo detection of protein interactions is more biologically relevant than in vitro methods.
- Reporter protein fragment complementation enables in vivo analysis through reconstituted reporter activity.
Impact:
- Enables deeper understanding of disease mechanisms.
- Facilitates the development of novel therapeutic strategies.
- Supports high-throughput screening for new therapeutic targets and drug discovery.
Related Concept Videos
02:26Protein Networks
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
02:04Protein-protein Interfaces
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...
01:19Protein 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...
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...