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. 1975 May;122(2):375–384. doi: 10.1128/jb.122.2.375-384.1975

Biochemical and regulatory effects of methionine analogues in Saccharomyces cerevisiae.

F Colombani, H Cherest, H de Robichon-Szulmajster
PMCID: PMC246067  PMID: 1092648

Abstract

The effect of three methionine analogues, ethionine, selenomethionine, and trifluoromethionine, on the biosynthesis of methionine in Saccharomyces cerevisiae has been investigated. We have found the following to be true. (i) A sharp decrease in the endogenous methionine concentration occurs after the addition of any one of these analogues to growing cells. (ii) All of them can be transferred to methionine transfer ribonucleic acid in vitro as well as in vivo with, as a consequence, their incorporation into proteins. In the absence of radioactive trifluoromethionine, this conclusion results from experiments of an indirect nature and must be taken as an indication rather than a direct demonstration. (iii) Ethionine and selenomethionine can be activated as homologues of S-adenosylmethionine, whereas trifluoromethionine cannot. (iv) All of them can act as repressors of the methionine biosynthetic pathway. This has been shown by measuring the de novo rate of synthesis of methionine in a culture grown in the presence of any one of the three analogues.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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