Structure-Based Design of Peptidic Inhibitors of the Interaction between CC Chemokine Ligand 5 (CCL5) and Human Neutrophil Peptides 1 (HNP1)

J Med Chem. 2016 May 12;59(9):4289-301. doi: 10.1021/acs.jmedchem.5b01952. Epub 2016 Feb 23.

Abstract

Protein-protein interactions (PPIs) are receiving increasing interest, much sparked by the realization that they represent druggable targets. Recently, we successfully developed a peptidic inhibitor, RRYGTSKYQ ("SKY" peptide), that shows high potential in vitro and in vivo to interrupt a PPI between the platelet-borne chemokine CCL5 and the neutrophil-derived granule protein HNP1. This PPI plays a vital role in monocyte adhesion, representing a key mechanism in acute and chronic inflammatory diseases. Here, we present extensive and detailed computational methods applied to develop the SKY peptide. We combined experimentally determined binding affinities (KD) of several orthologs of CCL5 with HNP1 with in silico studies to identify the most likely heterodimeric CCL5-HNP1 complex which was subsequently used as a starting structure to rationally design peptidic inhibitors. Our method represents a fast and simple approach that can be widely applied to determine other protein-protein complexes and moreover to design inhibitors or stabilizers of protein-protein interaction.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Adhesion
  • Chemokine CCL5 / antagonists & inhibitors
  • Chemokine CCL5 / metabolism*
  • Dimerization
  • Drug Design
  • Humans
  • Monocytes / cytology
  • Peptides / chemistry
  • Peptides / pharmacology*
  • Protein Conformation
  • Thermodynamics
  • alpha-Defensins / antagonists & inhibitors
  • alpha-Defensins / metabolism*

Substances

  • CCL5 protein, human
  • Chemokine CCL5
  • Peptides
  • alpha-Defensins
  • human neutrophil peptide 1