Generation and Testing of Fluorescent Adaptable Simple Theranostic (FAST) Proteins

Area of Science:

• Biochemistry
• Molecular Biology
• Cell Biology

Background:

• Recombinant protein production is crucial for research and therapeutics.
• Existing methods often involve bacterial or yeast expression, limiting applications.
• Secreted fluorescent proteins offer novel possibilities for live cell imaging and assays.

Purpose of the Study:

• To provide a comprehensive protocol for generating secreted recombinant fluorescent fusion proteins from mammalian cell lines.
• To enable the direct use of fluorescent protein-secreting cells in live co-culture assays.
• To develop a system (FAST protein) adaptable for therapeutic applications.

Main Methods:

• In silico gene and protein characterization.
• Expression vector design and assembly.
• Eukaryotic cell line transfection and recombinant protein expression.
• Protein purification and characterization using histidine tags and TEV cleavage sites.
• Utilizes polymerase chain reaction (PCR) and standard cell culture techniques.

Main Results:

• Successful generation of recombinant fluorescent fusion proteins secreted into cell culture supernatant.
• Demonstration of the Fluorescent Adaptable Simple Theranostic (FAST) protein system's utility.
• The protocol is modular, with each part usable independently.

Conclusions:

• This protocol offers a novel method for producing secreted fluorescent fusion proteins in mammalian cells.
• The FAST protein system facilitates both research applications, such as live co-culture assays, and potential therapeutic uses.
• The protocol is accessible to researchers with basic PCR and cell culture expertise.