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Identification and characterization of POU class V family genes in Japanese red bellied newt, Cynops pyrrhogaster

Published online by Cambridge University Press:  15 August 2019

Shun Hasegawa ,
Isseki Nakao ,
Yuki Ootani ,
Ami Ogawa ,
Miku Takano  and
Tsutomu Kinoshita Open the ORCID record for Tsutomu Kinoshita [Opens in a new window]
Shun Hasegawa
Affiliation:
Department of Life Science, Faculty of Science, Rikkyo University, Tokyo 171-8501, Japan
Isseki Nakao
Affiliation:
Department of Life Science, Faculty of Science, Rikkyo University, Tokyo 171-8501, Japan
Yuki Ootani
Affiliation:
Department of Life Science, Faculty of Science, Rikkyo University, Tokyo 171-8501, Japan
Ami Ogawa
Affiliation:
Department of Life Science, Faculty of Science, Rikkyo University, Tokyo 171-8501, Japan
Miku Takano
Affiliation:
Department of Life Science, Faculty of Science, Rikkyo University, Tokyo 171-8501, Japan
Tsutomu Kinoshita*
Affiliation:
Department of Life Science, Faculty of Science, Rikkyo University, Tokyo 171-8501, Japan
*
Address for correspondence: Tsutomu Kinoshita. Department of Life Science, Faculty of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan. Tel: +81 3-3985-2388. Fax: +81 3-3985-3386. E-mail: tkinoshita@rikkyo.ac.jp
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Summary

Mammalian Pou5f1 encodes the POU family class V (POU-V) transcription factor which is essential for the pluripotency of embryonic cells and germ cells. In vertebrates, various POU-V family genes have been identified and classified into the POU5F1 family or its paralogous POU5F3 family. In this study, we cloned two cDNAs named CpPou5f1 and CpPou5f3, which encode POU-V family proteins of the Japanese red bellied newt Cynops pyrrhogaster. In the predicted amino acid sequence encoded by CpPou5f1, the typical MAGH sequence at the N-terminus and deletion of arginine at the fifth position of POU-homeodomain were recognized, but not in the sequence encoded by CpPou5f3. Phylogenetic analysis using Clustal Omega software indicated that CpPou5f1 and CpPou5f3 are classified into the clade of the POU5F1 and POU5F3 families, respectively. In a real-time polymerase chain reaction (RT-PCR) analysis, the marked gene expression of CpPou5f1 was observed during oogenesis and early development up to the tail-bud stage, whereas weak gene expression of CpPou5f3 was detected only in the early stages of oogenesis and gastrula. In adult organs, CpPou5f1 was expressed only in the ovary, while gene expression of CpPou5f3 was recognized in various organs. A regeneration experiment using larval forelimb revealed that transient gene expression of CpPou5f1 occurred at the time of wound healing, followed by gene activation of CpPou5f3 during the period of blastema formation. These results suggest that CpPou5f1 and CpPou5f3 might play different roles in embryogenesis and limb regeneration.

Keywords

Cynops pyrrhogasterGene expressionLimb regenerationParaloguePOU class V family
Type
Research Article
Information
Zygote , Volume 27 , Issue 5 , October 2019 , pp. 329 - 336
Copyright
© Cambridge University Press 2019 

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