Glutamate-receptor-like molecule GluRδ2 involved in synapse formation at parallel fiber-Purkinje neuron synapses.
Glutamate-receptor-like molecule δ2 (GluRδ2, GluD2) has been classified as an ionotropic glutamate receptor subunit. It is selectively expressed on the postsynaptic membrane at parallel fiber-Purkinje neuron synapses in the cerebellum. Mutant mice deficient in GluRδ2 show impaired synaptic plasticity, the decrease in the number of parallel fiber-Purkinje neuron synapses, multiple innervation of climbing fibers on a Purkinje neuron, and defects in motor control and learning. Thus, GluRδ2 plays crucial roles in the cerebellar function. Recent studies on GluRδ2 have shown that it has synaptogenic activity. GluRδ2 expressed in a non-neuronal cell induces presynaptic differentiation of granule neurons in a co-culture preparation. This synaptogenic activity depends on an extracellular N-terminal leucine/isoleucine/valine binding protein-like domain of GluRδ2. GluRδ2 plays critical roles in formation, maturation, and/or maintenance of granule neuron-Purkinje neuron synapses.
Hirano
Tomoo
T
Department of Biophysics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan. thirano@neurosci.biophys.kyoto-u.ac.jp
D000818:Animals; D002454:Cell Differentiation / Q000502:physiology; D002525:Cerebellar Cortex / Q000166:cytology / Q000254:growth & development* / Q000378:metabolism; D006801:Humans; D009412:Nerve Fibers / Q000378:metabolism / Q000502:physiology*; D011689:Purkinje Cells / Q000166:cytology / Q000378:metabolism / Q000502:physiology*; D017470:Receptors, Glutamate / Q000737:chemistry / Q000502:physiology*; D013569:Synapses / Q000378:metabolism / Q000502:physiology*
D017470:Receptors, Glutamate; C107913:glutamate receptor delta 2
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