Molecular simulation of the binding of nerve growth factor peptide mimics to the receptor tyrosine kinase A

Biophys J. 2006 Sep 15;91(6):2063-71. doi: 10.1529/biophysj.106.083519. Epub 2006 Jun 23.

Abstract

Nerve growth factor (NGF) mimics play an important role for therapies that target the receptor tyrosine kinase A (trkA). The N-terminal fragment of the NGF (N-term@NGF) was previously demonstrated to be an important determinant for affinity and specificity in the binding to trkA. Here we use a variety of computational tools (contact surface analysis and free energy predictions) to identify residues playing a key role for the binding to the receptor. Molecular dynamics simulations are then used to investigate the stability of complexes between trkA and peptides mimicking N-term@NGF. Steered molecular dynamics calculations are finally performed to investigate the process of detaching the peptide from the receptor. Three disruptive events are observed, the first involving the breaking of all intermolecular interactions except two salt bridges, which break subsequently.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Computer Simulation
  • Models, Molecular*
  • Molecular Mimicry
  • Nerve Growth Factor / chemistry*
  • Peptides / chemistry*
  • Protein Binding
  • Protein Structure, Tertiary
  • Receptor, trkA / chemistry*
  • Thermodynamics

Substances

  • Peptides
  • Nerve Growth Factor
  • Receptor, trkA