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Publication : Multiple roles for the active zone protein RIM1alpha in late stages of neurotransmitter release.

First Author  Calakos N Year  2004
Journal  Neuron Volume  42
Issue  6 Pages  889-96
PubMed ID  15207234 Mgi Jnum  J:107731
Mgi Id  MGI:3621832 Doi  10.1016/j.neuron.2004.05.014
Citation  Calakos N, et al. (2004) Multiple roles for the active zone protein RIM1alpha in late stages of neurotransmitter release. Neuron 42(6):889-96
abstractText  The active zone protein RIM1alpha interacts with multiple active zone and synaptic vesicle proteins and is implicated in short- and long-term synaptic plasticity, but it is unclear how RIM1alpha's biochemical interactions translate into physiological functions. To address this question, we analyzed synaptic transmission in autaptic neurons cultured from RIM1alpha-/- mice. Deletion of RIM1alpha causes a large reduction in the readily releasable pool of vesicles, alters short-term plasticity, and changes the properties of evoked asynchronous release. Lack of RIM1alpha, however, had no effect on synapse formation, spontaneous release, overall Ca2+ sensitivity of release, or synaptic vesicle recycling. These results suggest that RIM1alpha modulates sequential steps in synaptic vesicle exocytosis through serial protein-protein interactions and that this modulation is the basis for RIM1alpha's role in synaptic plasticity.
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