胞吐
细胞生物学
神经递质
突触小泡
突触蛋白
生物
体内
突变体
蒙克-18
神经传递
小泡
生物化学
遗传学
分泌物
基因
膜
受体
作者
Peter Bronk,Julia J. Wenniger,Ken Dawson‐Scully,Xiufang Guo,Susie Hong,Harold L. Atwood,Konrad E. Zinsmaier
出处
期刊:Neuron
[Elsevier]
日期:2001-05-01
卷期号:30 (2): 475-488
被引量:119
标识
DOI:10.1016/s0896-6273(01)00292-6
摘要
Previous in vitro studies of cysteine-string protein (CSP) imply a potential role for the clathrin-uncoating ATPase Hsc70 in exocytosis. We show that hypomorphic mutations in Drosophila Hsc70-4 (Hsc4) impair nerve-evoked neurotransmitter release, but not synaptic vesicle recycling in vivo. The loss of release can be restored by increasing external or internal Ca(2+) and is caused by a reduced Ca(2+) sensitivity of exocytosis downstream of Ca(2+) entry. Hsc4 and CSP are likely to act in common pathways, as indicated by their in vitro protein interaction, the similar loss of evoked release in individual and double mutants, and genetic interactions causing a loss of release in trans-heterozygous hsc4-csp double mutants. We suggest that Hsc4 and CSP cooperatively augment the probability of release by increasing the Ca(2+) sensitivity of vesicle fusion.
科研通智能强力驱动
Strongly Powered by AbleSci AI