Direct ligand screening against membrane proteins on live cells enabled by DNA-programmed affinity labelling

Area of Science:

• Biochemistry
• Molecular Biology
• Chemical Biology

Background:

• Membrane proteins represent a significant class of drug targets.
• Their hydrophobic nature presents substantial challenges for ligand discovery and screening.
• Existing methods for studying membrane proteins often require complex procedures or are not suitable for live-cell applications.

Purpose of the Study:

• To develop a novel method for specifically labeling membrane proteins on live cells.
• To facilitate the screening of chemical compounds against membrane proteins.
• To overcome the challenges associated with the hydrophobic nature of membrane proteins in drug discovery.

Main Methods:

• Development and application of DNA-programmed affinity labelling (DPAL).
• Specific labeling of membrane proteins using a DNA tag.
• Direct screening of chemical compounds against labeled membrane proteins on live cells.

Main Results:

• Demonstration of successful and specific labeling of membrane proteins with DNA tags using DPAL.
• Establishment of a live-cell screening platform for membrane protein ligands.
• Overcoming the hydrophobic barrier in membrane protein drug discovery.

Conclusions:

• DPAL is a powerful technique for specifically labeling membrane proteins.
• This method enables efficient screening of chemical compounds directly on live cells.
• DPAL significantly advances the field of membrane protein drug discovery.