The role of calmodulin as a signal integrator for synaptic plasticity

Nat Rev Neurosci. 2005 Apr;6(4):267-76. doi: 10.1038/nrn1647.


Excitatory synapses in the brain show several forms of synaptic plasticity, including long-term potentiation (LTP) and long-term depression (LTD), which are initiated by increases in intracellular Ca(2+) that are generated through NMDA (N-methyl-D-aspartate) receptors or voltage-sensitive Ca(2+) channels. LTP depends on the coordinated regulation of an ensemble of enzymes, including Ca(2+)/calmodulin-dependent protein kinase II, adenylyl cyclase 1 and 8, and calcineurin, all of which are stimulated by calmodulin, a Ca(2+)-binding protein. In this review, we discuss the hypothesis that calmodulin is a central integrator of synaptic plasticity and that its unique regulatory properties allow the integration of several forms of signal transduction that are required for LTP and LTD.

Publication types

  • Research Support, U.S. Gov't, P.H.S.
  • Review

MeSH terms

  • Animals
  • Calmodulin / chemistry
  • Calmodulin / physiology*
  • Humans
  • Neuronal Plasticity / physiology*
  • Signal Transduction / physiology*
  • Synapses / physiology*


  • Calmodulin