Energy-dependence of nitrate reductase induction in Candida utilis

Prabhakara V Choudary, G. Ramananda Rao

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3 Scopus citations


The requirement of a suitable energy source during the induced synthesis of nitrate reductase in Candida utilis was investigated. The levels of nitrate reductase induced were shown to be energy-dependent, and to vary in response to the type of carbon source provided. Glycerol, fructose, ethanol, glucose, and sucrose served as efficient energy sources. Growth rate of the yeast and the induced level of nitrate reductase were dependent on the ratio of carbon to nitrogen in the induction medium, and ratio of 2 being optimal. Induction of nitrate reductase was inhibited by uncouplers, 2,4-dinitrophenol (DNP), dicumarol and carbonyl cyanide p-trifluoromethoxy phenyl hydrazone (CCCP), and by cyanide and azide, indicating an absolute energy-dependency. The facilitation of induction of a high level of nitrate reductase by exogenously added ATP as sole source of energy confirmed the obligate requirement of ATP for the synthesis of nitrate reductase in Candidautilis.

Original languageEnglish (US)
Pages (from-to)1293-1299
Number of pages7
JournalBiochemical and Biophysical Research Communications
Issue number3
StatePublished - Oct 15 1982
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Molecular Biology


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