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• W3202970859 abstract "In humans, loss-of-function mutations in the UBE3A gene lead to the neurodevelopmental disorder Angelman syndrome (AS). AS patients have severe impairments in speech, learning and memory, and motor coordination, for which there is currently no treatment. In addition, UBE3A is duplicated in > 1-2% of patients with autism spectrum disorders-a further indication of the significant role it plays in brain development. Altered expression of UBE3A, an E3 ubiquitin ligase, is hypothesized to lead to impaired levels of its target proteins, but identifying the contribution of individual UBE3A targets to UBE3A-dependent deficits remains of critical importance. Ephexin5 is a putative UBE3A substrate that has restricted expression early in development, regulates synapse formation during hippocampal development, and is abnormally elevated in AS mice, modeled by maternally-derived Ube3a gene deletion. Here, we report that Ephexin5 can be directly ubiquitylated by UBE3A. Furthermore, removing Ephexin5 from AS mice specifically rescued hippocampus-dependent behaviors, CA1 physiology, and deficits in dendritic spine number. Our findings identify Ephexin5 as a key driver of hippocampal dysfunction and related behavioral deficits in AS mouse models. These results demonstrate the exciting potential of targeting Ephexin5, and possibly other UBE3A substrates, to improve symptoms of AS and other UBE3A-related developmental disorders." @default.
• W3202970859 created "2021-10-11" @default.
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• W3202970859 date "2021-09-30" @default.
• W3202970859 modified "2023-10-14" @default.
• W3202970859 title "Deleting a UBE3A substrate rescues impaired hippocampal physiology and learning in Angelman syndrome mice" @default.
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• W3202970859 doi "https://doi.org/10.1038/s41598-021-97898-w" @default.
• W3202970859 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8484563" @default.
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