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Ran and Calcineurin Can Participate Collaboratively in the Regulation of Spermatogenesis in Scallop

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Title: Ran and Calcineurin Can Participate Collaboratively in the Regulation of Spermatogenesis in Scallop
Authors: Hino, Hirotsugu Browse this author
Arimoto, Kana Browse this author
Yazawa, Michio Browse this author
Murakami, Yota Browse this author →KAKEN DB
Nakatomi, Akiko Browse this author →KAKEN DB
Keywords: Ran
Issue Date: Aug-2012
Publisher: Springer New York
Journal Title: Marine Biotechnology
Volume: 14
Issue: 4
Start Page: 479
End Page: 490
Publisher DOI: 10.1007/s10126-011-9429-9
PMID: 22246556
Abstract: Calcineurin is a calcium/calmodulin-dependent protein phosphatase that plays important roles in the transduction of calcium signals in a variety of tissues. In addition, calcineurin has been implicated in the process of spermatogenesis. A novel calcineurin-binding protein, CaNBP75, has been identified in scallop testis. The C-terminal region of CaNBP75 is homologous to the C-terminal region of RanBP3, a Ran binding domain-containing protein. A small G-protein Ran has been involved in spermiogenesis by virtue of the fact that its localization in spermatids changes during spermiogenesis. The current study was performed to investigate the functions of Ran and CaNBP75 in the regulation of calcineurin in testis to further understand the basic functions of calcineurin during spermatogenesis. First, cloning and sequencing of a scallop Ran cDNA isolated from testis revealed that scallop Ran is well-conserved at the amino acid level. Secondly, direct binding of Ran to CaNBP75 was demonstrated in an in vitro pull-down assay. Thirdly, analysis of the tissue distribution of Ran, CaNBP75 and calcineurin showed that these proteins are abundantly expressed in testis. Fourthly, comparison of the expression profiles of Ran and CaNBP75 with that of calcineurin in scallop testis during the maturation cycle revealed that Ran and CaNBP75 mRNA levels increase during meiosis and spermiogenesis, similar to calcineurin. Finally, co-immunoprecipitation analysis suggests that Ran, CaNBP75 and calcineurin interact in scallop testis during maturation. These results suggest that Ran, CaNBP75, and calcineurin may act in a coordinated manner to regulate spermatogenesis.
Rights: The final publication is available at
Type: article (author version)
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 中冨 晶子

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