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dCIP4 (Drosophila Cdc42-Interacting Protein 4) Restrains Synaptic Growth by Inhibiting the Secretion of the Retrograde Glass Bottom Boat Signal

Cited 30 time in Web of Science Cited 31 time in Scopus
Authors
Nahm, Minyeop; Kim, Sungdae; Paik, Sang Kyoo; Lee, Mihye; Lee, Zang Hee; Lee, Daekee; Lee, Seungbok; Bae, Yong Chul; Kim, Jaesang; Lee, Seongsoo
Issue Date
2010-06-16
Publisher
Society for Neuroscience
Citation
JOURNAL OF NEUROSCIENCE, Vol.30, No.24, pp.8138-8150
Abstract
The bone morphogenetic protein (BMP) ligand Glass bottom boat (Gbb) acts as a retrograde growth signal at the Drosophila neuromuscular junction (NMJ). Endocytic regulation of presynaptic BMP receptors has been proposed to attenuate retrograde BMP signaling. However, it remains unknown whether the Gbb signal is also regulated by postsynaptic mechanisms. Here, we provide evidence that Drosophila Cdc42-interacting protein 4 (dCIP4) functions postsynaptically to inhibit synaptic growth. dCIP4 is localized postsynaptically at NMJs. dcip4 mutations lead to synaptic overgrowth and increased presynaptic phosphorylated mothers against decapentaplegic (Mad) levels, and these defects are rescued by muscle-specific expression of dCIP4. Biochemical and genetic analyses demonstrate that dCIP4 acts downstream of Cdc42 to activate the postsynaptic Wsp-Arp2/3 pathway. We also show that BMP signaling is necessary for synaptic overgrowth in larvae lacking postsynaptic dcip4 or wsp. Finally, dCIP4 and Wsp inhibit Gbb secretion. Thus, we propose that dCIP4 restrains synaptic growth by inhibiting postsynaptic Gbb secretion through the Wsp-Arp2/3 pathway.
ISSN
0270-6474
Language
English
URI
https://hdl.handle.net/10371/80547
DOI
https://doi.org/10.1523/JNEUROSCI.0256-10.2010
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College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
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