Expression of the human TSPY gene in the brains of transgenic mice suggests a potential role of this Y chromosome gene in neural functions

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Division of Cell and Developmental Genetics, Department of Medicine, VA Medical Center, and Institute for Human Genetics, University of California, San Francisco, CA 94121, USA
b.
Institute of Human Genetics, Hannover Medical School, D-30625 Hannover, Germany

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Corresponding author: E-mail address: chris.lau@ucsf.edu (Yun-Fai Chris Lau)

摘要

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Abstract: The testis specific protein Y-encoded (TSPY) is a member of TSPY/SET/NAP1 superfamily, encoded within the gonadoblastoma locus on the Y chromosome. TSPY shares a highly conserved SET/NAP-domain responsible for protein–protein interaction among TSPY/SET/NAP1 proteins. Accumulating data, so far, support the role of TSPY as the gonadoblastoma gene, involved in germ cell tumorigenesis. The X-chromosome homolog of TSPY, TSPX is expressed in various tissues at both fetal and adult stages, including the brain, and is capable of interacting with the multi-domain adapter protein CASK, thereby influencing the synaptic and transcriptional functions and developmental regulation of CASK in the brain and other neural tissues. Similar to TSPX, we demonstrated that TSPY could interact with CASK at its SET/NAP-domain in cultured cells. Transgenic mice harboring a human TSPY gene and flanking sequences showed specific expression of the human TSPY transgene in both testis and brain. The neural expression pattern of the human TSPY gene overlapped with those of the endogenous mouse Cask and Tspx gene. Similarly with TSPX, TSPY was co-localized with CASK in neuronal axon fibers in the brain, suggesting a potential role(s) of TSPY in development and/or physiology of the nervous system.
- TSPY /
- TSPX /
- CASK /
- Y chromosome /
- Neuron /
- Testis

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