Control of Lysine Biosynthesis in Yeast by a Feedback Mechanism
Abstract
Homocitric acid (β-hydroxy-β-carboxyadipic acid; HC) is accumulated by a lysine-requiring yeast mutant when grown in a chemically defined medium, supplemented with limited amounts of lysine. A study of the formation of HC in relation to the depletion of lysine from the growth medium indicates that HC accumulated only when the concentration of lysine was low. The enzymatic formation of HC from α-ketoglutarate plus acetyl-coenzyme A in cell-free extracts of the same organism was also inhibited by lysine. The inhibitory effect of lysine on the formation of HC in both whole cells and cell-free extracts is indicative of the functional existence of a feedback control mechanism in the pathway for lysine biosynthesis in yeast.
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© American Society for Microbiology.
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Published online: 1 May 1967
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Citation
1967.
Control of Lysine Biosynthesis in Yeast by a Feedback Mechanism. J Bacteriol
93:.
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