Novel 3β-hydroxysteroid dehydrogenases from gonads of the Nile tilapia: Phylogenetic significance and expression during reproductive cycle

B. Senthilkumaran, C. C. Sudhakumari, D. S. Wang, G. Sreenivasulu, T. Kobayashi, H. K. Kobayashi, M. Yoshikuni, Y. Nagahama

研究成果: ジャーナルへの寄稿学術誌査読

23 被引用数 (Scopus)

抄録

Multiple forms of 3β-hydroxysteroid dehydrogenase/isomerase (3β-HSD) and their differential tissue expression pattern have not been shown in any lower vertebrates. In the present study, we report cloning of two novel 3β-HSDs and two variants from gonads of the Nile tilapia. 3β-HSD cDNAs encode two peptides of 375 (3β-HSD type-I/variant 1) and 367 (3β-HSD type-II/variant 1) amino acid residues that share 31.9% homology. 3β-HSD type-I/variant 1 shared high homology with other piscine counterparts while 3β-HSD type-II/variant 1 exhibited homology to mammalian ΔC27-3β-HSD and multifunctional viral 3β-HSD. The latter seems to be ancient form among vertebrates. Transiently transfected 3β-HSDs' open reading frames in COS-7 cells converted exogenous pregnenolone/androsta-5-ene-3β-17β-diol to progesterone/testosterone. Tissue distribution pattern of 3β-HSDs by RT-PCR revealed varied expression pattern. Northern blot analysis of 3β-HSDs demonstrated steady or gradual rise in transcripts level at different gonadal stages. These data revealed the importance of novel 3β-HSDs in teleosts and also provided phylogenetic significance.

本文言語英語
ページ(範囲)146-152
ページ数7
ジャーナルMolecular and Cellular Endocrinology
299
2
DOI
出版ステータス出版済み - 2月 27 2009
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 生化学
  • 分子生物学
  • 内分泌学

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