Palmitoylation-dependent probes for labeling the Golgi apparatus

Area of Science:

• Cell biology
• Molecular imaging
• Chemical biology

Background:

• Golgi apparatus staining is crucial for studying cell biology and disease.
• Conventional ceramide-based stains lack Golgi specificity and require complex procedures.
• There is a need for simple, highly specific fluorescent probes for Golgi imaging.

Purpose of the Study:

• To develop and validate novel fluorescent probes for selective Golgi apparatus staining in living cells.
• To provide detailed synthetic and application protocols for these new probes.
• To demonstrate the utility of these probes in visualizing dynamic Golgi morphology.

Main Methods:

• Chemical synthesis of fluorescent probes incorporating the myristoyl-Gly-Cys (myrGC3Me) motif.
• Modular conjugation of the myrGC3Me motif with organic fluorescent dyes (blue, green, red).
• Application of probes for live-cell imaging, assessing specificity, cytotoxicity, and dynamic Golgi changes.

Main Results:

• Developed a series of blue, green, and red fluorescent probes targeting the Golgi membrane via S-palmitoylation.
• Probes enable simple, rapid, and highly specific Golgi staining in living cells.
• Demonstrated negligible cytotoxicity and successful visualization of dynamic Golgi morphology during drug treatments and cell division.

Conclusions:

• The novel myrGC3Me-based fluorescent probes provide an improved tool for Golgi apparatus research.
• These probes facilitate straightforward and precise investigation of Golgi functions and related diseases.
• The developed methodology allows for real-time observation of Golgi dynamics in response to cellular events.