Tracking and measuring local protein synthesis in vivo.

Area of Science:

• Molecular Biology
• Cell Biology
• Biochemistry

Background:

• Understanding protein synthesis is crucial for cell function.
• Existing methods for detecting protein synthesis lack in vivo applicability or temporal resolution.

Purpose of the Study:

• To develop a novel technique for real-time, in vivo detection and quantification of subcellular protein synthesis.
• To overcome limitations of current methods in terms of in vivo performance and temporal resolution.

Main Methods:

• Developed the Protein Translation Reporting (PTR) technique using a genetic tag.
• Utilized a split fluorescent protein system that generates fluorescence stoichiometrically with protein synthesis.
• Employed different colored and photoswitchable split fluorescent proteins for multiplexing and resetting detection.

Main Results:

• Demonstrated that PTR can detect and quantify protein synthesis events in real time in vivo.
• Showed fluorescence intensity is directly proportional to the number of synthesized protein molecules.
• Successfully tracked protein synthesis in single cells over time and detected multiple genes simultaneously.

Conclusions:

• PTR provides a powerful tool for studying protein synthesis dynamics at the subcellular level in vivo.
• The technique offers high temporal resolution and quantitative accuracy.
• PTR enables simultaneous monitoring of multiple genes and continuous resetting of detection time.