Split GFP technologies to structurally characterize and quantify functional biomolecular interactions of FTD-related...

Area of Science:

• Neurobiology
• Molecular Biology
• Biochemistry

Background:

• Protein multimerization is integral to neurodegenerative diseases.
• TDP-43, linked to ALS and FTD, forms functional nuclear oligomers; destabilization precedes pathology.
• Understanding TDP-43 oligomerization mechanisms is crucial for neurodegeneration research.

Purpose of the Study:

• To investigate the structural determinants of TDP-43 self-assembly using split GFP technologies.
• To quantitatively and qualitatively define TDP-43 oligomerization in a cellular context.
• To demonstrate the utility of GFP bimolecular and trimolecular fluorescence complementation (biFC and triFC) for studying protein multimerization in neurodegeneration.

Main Methods:

• Parallel implementation of GFP bimolecular (biFC) and trimolecular (triFC) fluorescence complementation.
• Application of orthogonal assays to analyze TDP-43 self-assembly.
• In situ analysis of protein localization and multimerization dynamics.

Main Results:

• Successfully applied biFC and triFC to study TDP-43 oligomerization.
• Defined structural factors influencing TDP-43 self-assembly qualitatively and quantitatively.
• Demonstrated the effectiveness of GFP-based complementation assays for neurodegenerative protein studies.

Conclusions:

• Split GFP technologies (biFC and triFC) are versatile tools for studying protein multimerization in neurodegeneration.
• These methods provide insights into the structural basis of TDP-43 oligomerization.
• Understanding TDP-43 oligomerization is vital for developing therapeutic strategies for FTD and ALS.