YjgF is required for isoleucine biosynthesis when Salmonella enterica is grown on pyruvate medium

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Date: Apr. 2008
From: Journal of Bacteriology(Vol. 190, Issue 7-8)
Publisher: American Society for Microbiology
Document Type: Author abstract; Report
Length: 112 words

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Abstract :

The YjgF/YER057c/UK114 family of proteins is conserved across the three domains of life, yet no biochemical function has been clearly defined for any member of this family. In Salmonella enterica, a deletion of yjgF results in a requirement for isoleucine when the mutant strain is grown in glucose-serine or pyruvate medium. Feedback inhibition of IlvA is required for the curative effect of isoleucine on glucose-serine medium. On pyruvate medium, yjgF mutants are unable to synthesize enough isoleucine for growth. From this study, we conclude that the isoleucine requirement of a yjgF mutant on pyruvate is a consequence of the decreased transaminase B (IlvE) activity that has previously been characterized in these mutants.

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Gale Document Number: GALE|A178348932