A Drosophila kinesin required for synaptic bouton formation and synaptic vesicle transport.

Abstract:

:The morphological transition of growth cones to synaptic boutons characterizes synaptogenesis. Here we have isolated mutations in immaculate connections (imac; CG8566), a previously uncharacterized Drosophila gene encoding a member of the Kinesin-3 family. Whereas earlier studies in Drosophila implicated Kinesin-1 in transporting synaptic vesicle precursors, we find that Imac is essential for this transport. An unexpected feature of imac mutants is the failure of synaptic boutons to form. Motor neurons lacking imac properly target to muscles but remain within target fields as thin processes, a structure that is distinct from either growth cones or mature terminals. Few active zones form at these endings. We show that the arrest of synaptogenesis is not a secondary consequence of the absence of transmission. Our data thus indicate that Imac transports components required for synaptic maturation and provide insight into presynaptic maturation as a process that can be differentiated from axon outgrowth and targeting.

journal_name

Nat Neurosci

journal_title

Nature neuroscience

authors

Pack-Chung E,Kurshan PT,Dickman DK,Schwarz TL

doi

10.1038/nn1936

subject

Has Abstract

pub_date

2007-08-01 00:00:00

pages

980-9

issue

8

eissn

1097-6256

issn

1546-1726

pii

nn1936

journal_volume

10

pub_type

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