Protocol for Nanodisc single-molecule pull-down assay to detect protein-lipid interactions.

Area of Science:

• Cellular Biology
• Biochemistry
• Molecular Interactions

Background:

• Phospholipids are key signaling molecules regulating cellular processes.
• Identifying proteins involved in lipid-mediated functions is critical for understanding cell signaling.
• Current methods may lack the resolution to characterize these interactions effectively.

Purpose of the Study:

• To present a detailed protocol for evaluating lipid-protein interactions.
• To enable the characterization of protein players involved in phospholipid signaling.
• To utilize advanced microscopy and nanotechnology for high-resolution analysis.

Main Methods:

• Development of a single-molecule pull-down (SiMPull) assay protocol.
• Utilizing mammalian whole-cell lysates expressing proteins of interest.
• Employing Nanodiscs and total internal reflection fluorescence (TIRF) microscopy for detection.

Main Results:

• The protocol allows for the preparation of materials and slide chambers for SiMPull assays.
• Successful execution of the SiMPull assay enables data acquisition.
• Single-molecule resolution detection of lipid-protein interactions is achieved.

Conclusions:

• The presented SiMPull assay protocol provides a robust method for studying lipid-protein interactions.
• This technique facilitates the identification and characterization of proteins involved in phospholipid signaling.
• The use of Nanodiscs and TIRF microscopy enhances the resolution and sensitivity of interaction detection.