期刊
ELIFE
卷 9, 期 -, 页码 -出版社
ELIFE SCIENCES PUBLICATIONS LTD
DOI: 10.7554/eLife.62184
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类别
资金
- National Eye Institute EY [EY 026817, EY 029953, EY 026477, EY010843, EY012682]
- McPherson Eye Research Institute
- Research to Prevent Blindness
Synapses are fundamental information processing units that rely on voltage-gated Ca2+(Ca-v) channels to trigger Ca2+-dependent neurotransmitter release. Ca-v channels also play Ca2+-independent roles in other biological contexts, but whether they do so in axon terminals is unknown. Here, we addressed this unknown with respect to the requirement for Ca(v)1.4 L-type channels for the formation of rod photoreceptor synapses in the retina. Using a mouse strain expressing a non-conducting mutant form of Ca(v)1.4, we report that the Ca(v)1.4 protein, but not its Ca2+ conductance, is required for the molecular assembly of rod synapses; however, Ca(v)1.4 Ca2+ signals are needed for the appropriate recruitment of postsynaptic partners. Our results support a model in which presynaptic Ca-v channels serve both as organizers of synaptic building blocks and as sources of Ca2+ ions in building the first synapse of the visual pathway and perhaps more broadly in the nervous system.
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