Microscale thermophoresis as a sensitive method to quantify protein: nucleic acid interactions in solution

Area of Science:

• Biochemistry
• Molecular Biology
• Biophysics

Background:

• Microscale thermophoresis (MST) is an emerging technique for analyzing molecular interactions in solution.
• The method leverages the movement of molecules in a temperature gradient (thermophoresis) to infer properties like size, charge, and hydration.

Purpose of the Study:

• To provide a detailed protocol for analyzing biomolecular interactions using MST.
• To demonstrate the application of MST for studying DNA-protein interactions.

Main Methods:

• Utilizing microscale thermophoresis (MST) for quantitative analysis of molecular binding.
• Employing serial dilutions of binding substrates to determine quantitative binding parameters.
• Using AT-hook peptides as a model system to study interactions with double-stranded DNA.

Main Results:

• MST enables quantitative analysis of molecular interactions at the microliter scale.
• The technique is applicable to various biomolecular interactions, including protein-DNA binding.
• Binding of AT-hook peptides to DNA was analyzed using the MST protocol.

Conclusions:

• MST is a versatile method for characterizing biomolecular interactions.
• The presented protocol facilitates the study of DNA-protein interactions.
• MST provides valuable insights into molecular binding events.