Neuron
Volume 21, Issue 1, July 1998, Pages 123-136
Journal home page for Neuron

Article
Munc13-1 Is a Presynaptic Phorbol Ester Receptor that Enhances Neurotransmitter Release

https://doi.org/10.1016/S0896-6273(00)80520-6Get rights and content
Under an Elsevier user license
open archive

Abstract

Munc13-1, a mammalian homolog of C. elegans unc-13p, is thought to be involved in the regulation of synaptic transmission. We now demonstrate that Munc13-1 is a presynaptic high-affinity phorbol ester and diacylglycerol receptor with ligand affinities similar to those of protein kinase C. Munc13-1 associates with the plasma membrane in response to phorbol ester binding and acts as a phorbol ester–dependent enhancer of transmitter release when overexpressed presynaptically in the Xenopus neuromuscular junction. These observations establish Munc13-1 as a novel presynaptic target of the diacylglycerol second messenger pathway that acts in parallel with protein kinase C to regulate neurotransmitter secretion.

Cited by (0)