Tau Interaction with Tubulin and Microtubules: From Purified Proteins to Cells

Area of Science:

• Cell Biology
• Biophysics
• Neuroscience

Background:

• Microtubules (MTs) are vital cellular components involved in numerous processes.
• Microtubule-associated proteins (MAPs), like Tau, regulate MT dynamics.
• The precise nature of Tau-MTs interactions remains debated, with varying experimental results.

Purpose of the Study:

• To investigate the interaction between Tau protein and tubulin.
• To clarify the affinity, stoichiometry, and topology of Tau-MTs binding.
• To provide guidance on biophysical methods for studying Tau-tubulin interactions.

Main Methods:

• Focus on three biophysical techniques: turbidimetry, cosedimentation assay, and Förster Resonance Energy Transfer (FRET).
• Application of these methods for in vitro and in-cell studies of Tau-tubulin interaction.
• Emphasis on experimental precautions to avoid pitfalls and ensure reliable data.

Main Results:

• Turbidimetry, cosedimentation, and FRET offer insights into Tau-tubulin binding.
• Careful methodology is essential for accurate determination of Tau-MTs interaction parameters.
• The study highlights how experimental conditions influence observed Tau-MTs interactions.

Conclusions:

• Biophysical methods can elucidate Tau-tubulin interactions, but require careful execution.
• Understanding Tau-MTs binding is critical for comprehending MT regulation.
• This work aims to resolve controversies surrounding Tau-MTs interaction dynamics.