Molecular events associated with induction of arginase in Saccharomyces cerevisiae.

Journal of Bacteriology
J Bossinger, T G Cooper

Abstract

Arginase, the enzyme responsible for arginine degradation in Saccharomyces cerevisiae, is an inducible protein whose inhibition of ornithine carbamoyl-transferase has been studied extensively. Mutant strains defective in the normal regulation of arginase production have also been isolated. However, in spite of these studies, the macromolecular biosynthetic events involved in production of arginase remain obscure. We have, therefore, studied the requirements of arginase induction. We observed that: (i) 4 min elapsed between the addition of inducer (homoarginine) and the appearance of arginase activity at 30 degrees C; (ii) induction required ribonucleic acid synthesis and a functional rna1 gene product; and (iii) production of arginase-specific synthetic capacity occurred in the absence of protein synthesis but could be expressed only when protein synthesis was not inhibited. Termination of induction by inducer removal, addition of the ribonucleic acid synthesis inhibitor lomofungin, or resuspension of a culture of organisms containing temperature-sensitive rna1 gene products in a medium at 35 degrees C resulted in loss of ability for continued arginase synthesis with half-lives of 5.5, 3.8, and 4.5 min, respectively. These and ...Continue Reading

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Citations

Feb 26, 1979·Molecular & General Genetics : MGG·L L Chia, C McLaughlin
Jan 1, 1986·Antonie van Leeuwenhoek·S Mormeneo, R Sentandreu
Nov 1, 1979·Molecular & General Genetics : MGG·L W Wang, G A Marzluf
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Oct 8, 2003·Systematic and Applied Microbiology·Purificación CarrascoMarcel lí del Olmo

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