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Identification of a Novel Substrate for Tyrosine Kinase in Human Testes

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Identification of genes specifically expressed in adult and fetal testes is important in furthering our understanding of testis development and function. In this study, a novel human specific transcript, designated NYD-SP10, was identified by hybridization of adult and fetal human testis probes with a human cDNA microarray. NYD-SP10 (GenBank Accession no. AF332192) was expressed at a higher level in adult testes than in fetal testes. Bioinformatic analysis illustrated NYD-SP10 is a splice variant of regulatory factor X4, while it is lack of RFX DNA-binding domain which binds to the X box of MHC class II genes. Most telling of all, NYD-SP10 uniquely possesses a tyrosine kinase phosphorylation site. Expression profiles demonstrated NYD-SP10 is specifically and strongly expressed in human adult testes and ejaculated spermatozoa. Taken together, these results suggest that NYD-SP10 is a novel testis-specific gene and it is possibly a novel substrate for tyrosine kinase and involved in the function of human spermatozoa, especially during capacitation.


Document Type: Research Article


Publication date: August 1, 2005

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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