Advancements in therapeutically targeting orphan GPCRs

Area of Science:

• Pharmacology
• Structural Biology
• Drug Discovery

Background:

• G-protein coupled receptors (GPCRs) are key drug targets, but over 140 are 'orphan' with unknown ligands.
• Studying orphan GPCRs and developing therapeutics has been historically slow and difficult.

Purpose of the Study:

• To highlight recent advances in studying orphan GPCRs.
• To demonstrate how these advances facilitate the identification of novel therapeutics.

Main Methods:

• Utilizing protein crystallography to solve GPCR structures.
• Employing homology modeling with multiple templates and molecular dynamics simulations.
• Conducting virtual ligand screening using GPCR homology models.

Main Results:

• Increased availability of solved GPCR structures enhances homology model accuracy.
• Improved homology models lead to higher success rates in virtual ligand screening.
• Experimental validation confirms computationally identified potential drug candidates.

Conclusions:

• Orphan GPCRs are emerging as viable and important targets for drug discovery.
• Advances in structural and computational techniques are overcoming previous limitations in targeting these receptors.