Transfer RNA analysis during the reproductive cycle of a freshwater teleost, H. fossilis

Malancha Sarkar, P. R. Subbarayan, Manjula Vinayak

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Transfer RNA was analyzed qualitatively as well as quantitatively from ovaries of the fresh water teleost Heteropneustes fossilis for twelve months. The tRNA samples were found to be pure and devoid of any high molecular weight RNA or DNA contaminations. The quantity of tRNA as well as its biological activity, assayed by in vitro aminoacylation using homologous aminoacyl tRNA synthetases, were found to be higher during resting and preparatory (pre-vitellogenic) phases, i.e. from November to March, as compared to vitellogenic and spawning phases of the fish, i.e. from April to October. The highest tRNA pool and its activity was found in the month of February, which coincides with the early preparatory phase. The results indicate that the accumulation of active tRNA starts in the resting phase. Such an accumulation of tRNA may be a part of the enrichment of mature eggs with complete translational machinery before ovulation in order to cope with the high rate of protein synthesis after fertilization.

Original languageEnglish (US)
Pages (from-to)9-13
Number of pages5
JournalMolecular Biology Reports
Volume20
Issue number1
DOIs
StatePublished - Jul 1 1994

Keywords

  • aaRS
  • aminoacylation
  • reproductive cycle
  • tRNA

ASJC Scopus subject areas

  • Genetics
  • Cell Biology
  • Biochemistry

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