PMID: 28300404

Authors:

Blevitt JM, Hack MD, Herman KL, Jackson PF, Krawczuk PJ, Lebsack AD, Liu AX, Mirzadegan T, Nelen MI, Patrick AN, Steinbacher S, Milla ME, Lumb KJ

Title:

Structural Basis of Small-Molecule Aggregate Induced Inhibition of a Protein-Protein Interaction.

Journal:

J Med Chem. 2017 Mar 16.

Abstract:

A prevalent observation in high-throughput screening and drug discovery programs is the inhibition of protein function by small-molecule compound aggregation. Here, we present the X-ray structural description of aggregation-based inhibition of a protein-protein interaction involving tumor necrosis factor alpha (TNFalpha). An ordered conglomerate of an aggregating small-molecule inhibitor (JNJ525) induces a quaternary structure switch of TNFalpha that inhibits the protein-protein interaction between TNFalpha and TNFalpha receptors. SPD-304 may employ a similar mechanism of inhibition.