Journal Article

Elucidating the druggable interface of protein–protein interactions using fragment docking and coevolutionary analysis

Cheng, Ryan R., Morcos, Faruck, Bai, Fang, Onuchic, José N., Jiang, Hualiang

2016

Overview

Protein–protein interactions play a central role in cellular function. Improving the understanding of complex formation has many practical applications, including the rational design of new therapeutic agents and the mechanisms governing signal transduction networks. The generally large, flat, and relatively featureless binding sites of protein complexes pose many challenges for drug design. Fragment docking and direct coupling analysis are used in an integrated computational method to estimate druggable protein–protein interfaces. (i) This method explores the binding of fragment-sized molecular probes on the protein surface using a molecular docking-based screen. (ii) The energetically favorable binding sites of the probes, called hot spots, are spatially clustered to map out candidate binding sites on the protein surface. (iii) A coevolution-based interface interaction score is used to discriminate between different candidate binding sites, yielding potential interfacial targets for therapeutic drug design. This approach is validated for important, well-studied disease-related proteins with known pharmaceutical targets, and also identifies targets that have yet to be studied. Moreover, therapeutic agents are proposed by chemically connecting the fragments that are strongly bound to the hot spots.

• Publisher: National Academy of Sciences
• Subject: Binding Sites / Biological Sciences / Biophysics and Computational Biology / CDC2 Protein Kinase - antagonists & inhibitors / CDC2 Protein Kinase - chemistry / CDC2 Protein Kinase - drug effects / CDC2-CDC28 Kinases - antagonists & inhibitors / CDC2-CDC28 Kinases - chemistry / CDC2-CDC28 Kinases - drug effects / Design / Drug Design / Evolution, Molecular / Histone Deacetylase 1 - antagonists & inhibitors / Histone Deacetylase 1 - chemistry / Histone Deacetylase 1 - drug effects / Histone Deacetylases - chemistry / Histone Deacetylases - drug effects / HIV Protease - chemistry / HIV Protease - drug effects / HIV Protease Inhibitors - chemistry / HIV Protease Inhibitors - pharmacology / HIV-1 - drug effects / HIV-1 - enzymology / Humans / Molecular Docking Simulation - methods / Molecular Probes / Pharmaceuticals / PNAS Plus / Probes / Protein Interaction Domains and Motifs - drug effects / Protein Multimerization - drug effects / Proteins / Proto-Oncogene Proteins c-mdm2 - antagonists & inhibitors / Proto-Oncogene Proteins c-mdm2 - chemistry / Proto-Oncogene Proteins c-mdm2 - drug effects / Repressor Proteins - antagonists & inhibitors / Repressor Proteins - chemistry / Repressor Proteins - drug effects / Signal transduction / Trans-Activators / Tumor Necrosis Factor-alpha - antagonists & inhibitors / Tumor Necrosis Factor-alpha - chemistry / Tumor Necrosis Factor-alpha - drug effects