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Cloning, characterisation, docking and expression analysis of 3-beta-hydroxysteroid dehydrogenase during ontogenetic development and annual reproductive cycles in catfish, Clarias batrachus.

Authors
  • Bhat, Irfan Ahmad1
  • Rather, Mohd Ashraf2
  • Nazir, Mir Ishfaq3
  • Pathakota, Gireesh-Babu1
  • Goswami, Mukunda1
  • Sundaray, J K4
  • Sharma, Rupam5
  • 1 Division of Fish Genetics and Biotechnology, ICAR-Central Institute of Fisheries Education, Mumbai 400061, India. , (India)
  • 2 Division of Fisheries Biology, College of Fisheries, Shirgaon, Ratnagiri 415629, India. , (India)
  • 3 Division of Fish Nutrition and Feed Technology, ICAR-Central Institute of Fisheries Education, Mumbai 400061, India. , (India)
  • 4 Division of Fish Genetics and Biotechnology, ICAR- Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar 751002, Odisha, India. , (India)
  • 5 Division of Fish Genetics and Biotechnology, ICAR-Central Institute of Fisheries Education, Mumbai 400061, India. Electronic address: [email protected] , (India)
Type
Published Article
Journal
Theriogenology
Publication Date
Jan 01, 2018
Volume
105
Pages
34–44
Identifiers
DOI: 10.1016/j.theriogenology.2017.09.017
PMID: 28923704
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Fish like higher animals, have a well-defined mechanism to produce sex steroids that play a critical role in gonadal development and maturation. In this study, we aimed to analyse the expression pattern of 3β-HSD in different tissues, during ontogenetic development and gonadal recrudescence of Clarias batrachus. A full-length cDNA of 1617 bp including an open reading frame (ORF) of 1125 bp encoding 374 amino acids was isolated from testes of C. batrachus. The docking analysis between C. batrachus 3β-HSD protein and eurycomanone exhibited high binding affinity toward each other with total energy of -108.292 kcal/mol and van der Waals (VDW) interaction of -84.2838 kcal/mol. The 3β-HSD transcript level during ontogeny was detected in all the stages starting from the fertilized egg. The mature C. batrachus showed more expression of 3β-HSD mRNA in gonads and brain while weak expression was detected in the remaining tissues analysed. The 3β-HSD mRNA expression during annual reproductive phases of gonads was more in preparatory and pre-spawning stages than that of spawning and post-spawning phases. The mRNA expression results together suggest that 3β-HSD plays an important role in gonadal development. Furthermore, the active binding sites on 3β-HSD protein could be targeted in pharmacological drug designing to cope with reproductive dysfunctions in fish. Copyright © 2017 Elsevier Inc. All rights reserved.

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