Mutations in Drosophila sec15 reveal a function in neuronal targeting for a subset of exocyst components

Sunil Q. Mehta, P. Robin Hiesinger, Slobodan Beronja, R. Grace Zhai, Karen L. Schulze, Patrik Verstreken, Yu Cao, Yi Zhou, Ulrich Tepass, Michael C. Crair, Hugo J. Bellen

Research output: Contribution to journalArticlepeer-review

109 Scopus citations

Abstract

The exocyst is a complex of proteins originally identified in yeast that has been implicated in polarized secretion. Components of the exocyst have been implicated in neurite outgrowth, cell polarity, and cell viability. We have isolated an exocyst component, sec15, in a screen for genes required for synaptic specificity. Loss of sec15 causes a targeting defect of photoreceptors that coincides with mislocalization of specific cell adhesion and signaling molecules. Additionally, sec15 mutant neurons fail to localize other exocyst members like Sec5 and Sec8, but not Sec6, to neuronal terminals. However, loss of sec15 does not cause cell lethality in contrast to loss of sec5 or sec6. Our data suggest a role of Sec15 in an exocyst-like subcomplex for the targeting and subcellular distribution of specific proteins. The data also show that functions of other exocyst components persist in the absence of sec15, suggesting that different exocyst components have separable functions.

Original languageEnglish (US)
Pages (from-to)219-232
Number of pages14
JournalNeuron
Volume46
Issue number2
DOIs
StatePublished - Apr 21 2005

ASJC Scopus subject areas

  • Neuroscience(all)

Fingerprint Dive into the research topics of 'Mutations in Drosophila sec15 reveal a function in neuronal targeting for a subset of exocyst components'. Together they form a unique fingerprint.

Cite this