Targeting Protein Interactions

Reflecting work in the Arora Lab

Published here February 16, 2026

From Concepts to Inhibitors: A Blueprint for Targeting Protein–Protein Interactions

Seong Ho Hong, Thu Nguyen, Joseph F. Ongkingco, Alex Nazzaro, Paramjit S. Arora

Chem. Rev. 2025, 125, 14, 6819–6869

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The manuscript titled "From Concepts to Inhibitors: A Blueprint for Targeting Protein–Protein Interactions" provides a comprehensive overview of the evolving landscape of drug discovery targeting protein-protein interactions (PPIs), which were long considered "undruggable" due to their large, flat surfaces. The authors review the conceptual and technical breakthroughs, including rational design principles and high-throughput screening that have made these interfaces accessible to therapeutic intervention.

The Arora Group, Christmas 2025

The Arora Group

By using the Ras protein as a primary case study for a historically challenging target, the paper details how computational approaches like alanine scanning and the identification of "hot spots" allow for the dissection of protein surfaces. Furthermore, the review explores the design of macrocycles, miniproteins, and peptidomimetics that mimic natural binding epitopes, offering a strategic framework for creating potent inhibitors that can effectively modulate complex biological pathways.

Targeting Protein Interactions

Author
Seong Ho “Johnny” Hong is a peptide chemist and chemical biologist focused on translating conformational control into function. He earned his Ph.D. in 2022 at New York University in the laboratory of Paramjit Arora and completed postdoctoral training with Daniel Nomura at the University of California, Berkeley. His research spans synthetic peptide chemistry, macrocyclization and covalent constraint strategies, proteomimetic design, and the induced-proximity paradigm. He is currently affiliated with Dimericon Therapeutics, advancing constrained peptides for drug discovery against intracellular PPI targets long considered undruggable.