RT Journal Article
SR Electronic
T1 The sec6/8 Complex Is Located at Neurite Outgrowth and Axonal Synapse-Assembly Domains
JF The Journal of Neuroscience
JO J. Neurosci.
FD Society for Neuroscience
SP 1324
OP 1334
DO 10.1523/JNEUROSCI.19-04-01324.1999
VO 19
IS 4
A1 Christopher D. Hazuka
A1 Davide L. Foletti
A1 Shu-Chan Hsu
A1 Yun Kee
A1 F. Woodward Hopf
A1 Richard H. Scheller
YR 1999
UL http://www.jneurosci.org/content/19/4/1324.abstract
AB The molecules that specify domains on the neuronal plasma membrane for the delivery and accumulation of vesicles during neurite outgrowth and synapse formation are unknown. We investigated the role of the sec6/8 complex, a set of proteins that specifies vesicle targeting sites in yeast and epithelial cells, in neuronal membrane trafficking. This complex was found in layers of developing rat brain undergoing synaptogenesis. In cultured hippocampal neurons, the sec6/8 complex was present in regions of ongoing membrane addition: the tips of growing neurites, filopodia, and growth cones. In young axons, the sec6/8 complex was also confined to periodic domains of the plasma membrane. The distribution of synaptotagmin, synapsin1, sec6, and FM1–43 labeling in cultured neurons suggested that the plasma membrane localization of the sec6/8 complex preceded the arrival of synaptic markers and was downregulated in mature synapses. We propose that the sec6/8 complex specifies sites for targeting vesicles at domains of neurite outgrowth and potential active zones during synaptogenesis.