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Eur J Neurosci. 2011 Jan;33(2):244-50. doi: 10.1111/j.1460-9568.2010.07506.x. Epub 2010 Dec 29.

Neurogranin phosphorylation fine-tunes long-term potentiation.

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  • 1Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI 53226, USA.

Abstract

Learning-related potentiation of synaptic strength at Cornu ammonis subfield 1 (CA1) hippocampal excitatory synapses is dependent on neuronal activity and the activation of glutamate receptors. However, molecular mechanisms that regulate and fine-tune the expression of long-term potentiation (LTP) are not well understood. Recently it has been indicated that neurogranin (Ng), a neuron-specific, postsynaptic protein that is phosphorylated by protein kinase C, potentiates synaptic transmission in an LTP-like manner. Here, we report that a Ng mutant that is unable to be phosphorylated cannot potentiate synaptic transmission in rat CA1 hippocampal neurons and results in a submaximal expression of LTP. Our results provide the first evidence that the phosphorylation of Ng can regulate LTP expression.

© 2010 The Authors. European Journal of Neuroscience © 2010 Federation of European Neuroscience Societies and Blackwell Publishing Ltd.

PMID:
21198977
[PubMed - indexed for MEDLINE]
PMCID:
PMC3058258
Free PMC Article

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