Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/37624
Title: Motor protein-dependent transport of AMPA receptors into spines during long-term potentiation
Authors: Correia, Susana S., Bassani, Silvia, Brown, Tyler C., Lisé, Marie-France, Backos, D. S., El-Husseini, Alaa, Passafaro, Maria, Esteban, José A.
Keywords: Trafficking
AMPARs
Activity-dependent synaptic plasticity
Hippocampus
Issue Date: 2-Mar-2008
Publisher: Nature Publishing Group
Abstract: The regulated trafficking of neurotransmitter receptors at synapses is critical for synaptic function and plasticity. However, the molecular machinery that controls active transport of receptors into synapses is largely unknown. We found that, in rat hippocampus, the insertion of AMPA receptors (AMPARs) into spines during synaptic plasticity requires a specific motor protein, which we identified as myosin Va. We found that myosin Va associates with AMPARs through its cargo binding domain. This interaction was enhanced by active, GTP-bound Rab11, which is also transported by the motor protein. Myosin Va mediated the CaMKII-triggered translocation of GluR1 receptors from the dendritic shaft into spines, but it was not required for constitutive GluR2 trafficking. Accordingly, myosin Va was specifically required for long-term potentiation, but not for basal synaptic transmission. In summary, we identified the specific motor protein and organelle acceptor that catalyze the directional transport of AMPARs into spines during activity-dependent synaptic plasticity.
Publisher version (URL): http://dx.doi.org/10.1038/nn2063
URI: http://hdl.handle.net/10261/37624
ISSN: 1097-6256
Citation: Nature Neuroscience 11, 457 - 466 (2008)
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