RRC ID 79038
Author Furusawa K, Ishii K, Tsuji M, Tokumitsu N, Hasegawa E, Emoto K.
Title Presynaptic Ube3a E3 ligase promotes synapse elimination through down-regulation of BMP signaling.
Journal Science
Abstract Inactivation of the ubiquitin ligase Ube3a causes the developmental disorder Angelman syndrome, whereas increased Ube3a dosage is associated with autism spectrum disorders. Despite the enriched localization of Ube3a in the axon terminals including presynapses, little is known about the presynaptic function of Ube3a and mechanisms underlying its presynaptic localization. We show that developmental synapse elimination requires presynaptic Ube3a activity in Drosophila neurons. We further identified the domain of Ube3a that is required for its interaction with the kinesin motor. Angelman syndrome-associated missense mutations in the interaction domain attenuate presynaptic targeting of Ube3a and prevent synapse elimination. Conversely, increased Ube3a activity in presynapses leads to precocious synapse elimination and impairs synaptic transmission. Our findings reveal the physiological role of Ube3a and suggest potential pathogenic mechanisms associated with Ube3a dysregulation.
Volume 381(6663)
Pages 1197-1205
Published 2023-9-15
DOI 10.1126/science.ade8978
PMID 37708280
MeSH Angelman Syndrome* / enzymology Angelman Syndrome* / genetics Animals Autism Spectrum Disorder* / enzymology Autism Spectrum Disorder* / genetics Down-Regulation Drosophila Proteins* / genetics Drosophila Proteins* / metabolism Drosophila melanogaster* Synapses / enzymology Synapses / genetics Synaptic Transmission* Ubiquitin-Protein Ligases* / genetics Ubiquitin-Protein Ligases* / metabolism