Challenges in Therapeutically Targeting the RNA-Recognition Motif

Area of Science:

• Biochemistry
• Molecular Biology
• Drug Discovery

Background:

• RNA recognition motif (RRM) domains are prevalent in human proteins, mediating critical RNA-centric processes like mRNA maturation and translation.
• Dysregulation of RRM-containing proteins, via overexpression or mutation, contributes to various diseases, highlighting their therapeutic potential.
• Developing selective and potent inhibitors targeting RRM domains is challenging due to their small size and conserved RNA-binding interfaces.

Purpose of the Study:

• To review the challenges and emerging strategies for targeting RNA recognition motif (RRM) domains therapeutically.
• To explore alternative approaches beyond direct RNA-binding inhibition for modulating RRM-containing protein activity.
• To discuss the potential of novel modalities in addressing these difficult therapeutic targets.

Main Methods:

• Literature review of RRM domain function, disease association, and therapeutic targeting strategies.
• Analysis of challenges in developing small molecule inhibitors for RRM domains.
• Exploration of alternative therapeutic modalities including oligonucleotides, peptides, and molecular glues.

Main Results:

• Direct inhibition of RRM domains is hampered by conserved interfaces and limited selectivity.
• Alternative strategies involve targeting composite pockets or protein-protein interaction sites.
• Novel modalities offer promising avenues for therapeutic intervention at the RNA regulatory level.

Conclusions:

• Targeting RRM domains requires innovative approaches beyond traditional RNA-binding inhibition.
• Exploring allosteric sites and utilizing alternative modalities can overcome selectivity and potency challenges.
• These advanced strategies hold promise for effective therapeutic intervention in RRM-mediated diseases.