Synaptic development is controlled in the periactive zones of Drosophila synapses.
A cell-adhesion molecule fasciclin 2 (FAS2), which is required for synaptic growth and still life (SIF), an activator of RAC, were found to localize in the surrounding region of the active zone, defining the periactive zone in Drosophila neuromuscular synapses. BetaPS integrin and discs large (DLG), both involved in synaptic development, also decorated the zone. However, shibire (SHI), the Drosophila dynamin that regulates endocytosis, was found in the distinct region. Mutant analyses showed that sif genetically interacted with Fas2 in synaptic growth and that the proper localization of SIF required FAS2, suggesting that they are components in related signaling pathways that locally function in the periactive zones. We propose that neurotransmission and synaptic growth are primarily regulated in segregated subcellular spaces, active zones and periactive zones, respectively.
Sone
M
M
Department of Molecular Genetics, National Institute of Neuroscience, NCNP, Kodaira, Tokyo 187-8502, Japan.
Suzuki
E
E
Hoshino
M
M
Hou
D
D
Kuromi
H
H
Fukata
M
M
Kuroda
S
S
Kaibuchi
K
K
Nabeshima
Y
Y
Hama
C
C
D000818:Animals; D015816:Cell Adhesion Molecules, Neuronal / Q000235:genetics / Q000378:metabolism*; D004330:Drosophila; D029721:Drosophila Proteins; D034281:Dynamins; D020558:GTP Phosphohydrolases; D020662:Guanine Nucleotide Exchange Factors / Q000235:genetics / Q000378:metabolism*; D019476:Insect Proteins; D016023:Integrins; D009469:Neuromuscular Junction / Q000254:growth & development* / Q000648:ultrastructure; D009474:Neurons / Q000648:ultrastructure; D017470:Receptors, Glutamate; D015398:Signal Transduction; D013570:Synaptic Membranes / Q000648:ultrastructure; D009435:Synaptic Transmission; D025521:Tumor Suppressor Proteins; D020744:rac GTP-Binding Proteins / Q000378:metabolism*
D015816:Cell Adhesion Molecules, Neuronal; D029721:Drosophila Proteins; D020662:Guanine Nucleotide Exchange Factors; D019476:Insect Proteins; D016023:Integrins; D017470:Receptors, Glutamate; D025521:Tumor Suppressor Proteins; C051642:fasciclin II; C103569:sif protein, Drosophila; C070350:dlg1 protein, Drosophila; D020558:GTP Phosphohydrolases; D020744:rac GTP-Binding Proteins; D034281:Dynamins; C439628:shi protein, Drosophila