The role of calmodulin as a signal integrator for synaptic plasticity

  • Xia Z
  • Storm D
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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.

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  • Zhengui Xia

  • Daniel R. Storm

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