β phorbol ester- and diacylglycerol-induced augmentation of transmitter release is mediated by Munc13s and not by PKCs

被引:382
作者
Rhee, JS
Betz, A
Pyott, S
Reim, K
Varoqueaux, F
Augustin, I
Hesse, D
Südhof, TC
Takahashi, M
Rosenmund, C
Brose, N
机构
[1] Max Planck Inst Biophys Chem, Abt Membranbiophys, D-37077 Gottingen, Germany
[2] Max Planck Inst Expt Med, Abt Mol Neurobiol, D-37075 Gottingen, Germany
[3] Max Planck Inst Expt Med, Abt Neurogenet, D-37075 Gottingen, Germany
[4] Univ Texas, SW Med Ctr, Howard Hughes Med Inst, Ctr Basic Neurosci,Dept Mol Genet, Dallas, TX 75390 USA
[5] Mitsubishi Kasei Inst Life Sci, Tokyo 1948511, Japan
关键词
D O I
10.1016/S0092-8674(01)00635-3
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Munc13-1 is a presynaptic protein with an essential role in synaptic vesicle priming. It contains a diacylglycerol (DAG)/beta phorbol ester binding C-1 domain and is a potential target of the DAG second messenger pathway that may act in parallel with PKCs. Using genetically modified mice that express a DAG/beta phorbol ester binding-deficient Munc13-1(H567K) variant instead of the wild-type protein, we determined the relative contribution of PKCs and Munc13-1 to DAG/beta phorbol ester-dependent regulation of neurotransmitter release. We show that Munc13s are the main presynaptic DAG/beta phorbol ester receptors in hippocampal neurons. Modulation of Munc13-1 activity by second messengers via the DAG/beta phorbol ester binding C-1 domain is essential for use-dependent alterations of synaptic efficacy and survival.
引用
收藏
页码:121 / 133
页数:13
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