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. 1973 May;114(2):666–673. doi: 10.1128/jb.114.2.666-673.1973

Effect of Methionine Sulfoximine and Methionine Sulfone on Glutamate Synthesis in Klebsiella aerogenes

Jean E Brenchley 1
PMCID: PMC251824  PMID: 4145197

Abstract

At least two pathways exist in Klebsiella aerogenes for glutamate synthesis. A mutant blocked in one pathway due to the loss of glutamate dehydrogenase (gltD) does not require glutamate and has the same growth characteristics as the parent strain in most media; however, its growth is inhibited by the analogues methionine sulfoximine and methionine sulfone. Wild-type Klebsiella is resistant to 0.1 M methionine sulfoximine or methionine sulfone, whereas the gltD mutant is sensitive to 1 mM concentrations. Either glutamate or glutamine is effective in overcoming this inhibition. Activities of both glutamine synthetase and glutamate synthetase, two enzymes involved in the second pathway of glutamate synthesis, are inhibited by methionine sulfoximine and methionine sulfone. The primary effect of methionine sulfoximine appears to be the prevention of glutamine production necessary for subsequent glutamate synthesis via glutamate synthetase enzyme.

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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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