期刊
NEURON
卷 32, 期 6, 页码 1107-1117出版社
CELL PRESS
DOI: 10.1016/S0896-6273(01)00535-9
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资金
- NEI NIH HHS [EY12141, R01 EY012141] Funding Source: Medline
A proton pump acidifies synaptic vesicles and provides the electrochemical gradient for transmitter uptake. Although external protons can modulate membrane voltage- and ligand-gated conductances, the fate of the protons released when vesicles fuse with the plasma membrane is unclear. In the dark, the glutamate-laden vesicles of cone photoreceptors fuse continuously with the plasma membrane. I now show that vesicular protons feed back to block the nearby calcium channels that mediate release. This local proton-mediated feedback is a novel mechanism through which neurons may regulate the release of transmitter.
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