Redistribution and loss of side chain entropy upon formation of a calmodulin-peptide complex. Academic Article uri icon


  • The response of the internal dynamics of calcium-saturated calmodulin to the formation of a complex with a peptide model of the calmodulin-binding domain of the smooth muscle myosin light chain kinase has been studied using NMR relaxation methods. The backbone of calmodulin is found to be unaffected by the binding of the domain, whereas the dynamics of side chains are significantly perturbed. The changes in dynamics are interpreted in terms of a heterogeneous partitioning between structure (enthalpy) and dynamics (entropy). These data provide a microscopic view of the residual entropy of a protein in two functional states and suggest extensive enthalpy/entropy exchange during the formation of a protein-protein interface.

published proceedings

  • Nat Struct Biol

author list (cited authors)

  • Lee, A. L., Kinnear, S. A., & Wand, A. J.

citation count

  • 320

complete list of authors

  • Lee, AL||Kinnear, SA||Wand, AJ

publication date

  • January 2000