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. 1971 Nov;108(2):715–719. doi: 10.1128/jb.108.2.715-719.1971

Effect of Hydroxylysine on the Biosynthesis of Lysine in Saccharomyces

Asru K Sinha 1, Mark Kurtz 1, Jnanendra K Bhattacharjee 1
PMCID: PMC247130  PMID: 5128332

Abstract

Hydroxylysine acts as a growth inhibitor of Saccharomyces for a certain period of time. The inhibition is concentration-dependent and is reversed by a small amount of lysine in the medium. After the growth-inhibitory period, the wild-type cells are able to grow rapidly even in the presence of hydroxylysine. Both lysine auxotrophs and wild-type cells are unable to utilize hydroxylysine in place of lysine. Hydroxylysine, mimicking lysine, controls the biosynthesis of lysine and thereby limits the availability of biosynthetic lysine to the cells. Hydroxylysine affects the biosynthesis of lysine at a number of enzymatic steps. Accumulation of homocitric acid, the first intermediate of lysine biosynthesis, in the mutant strains 19B and A B9 is reduced significantly in the presence of hydroxylysine. Hydroxylysine, like lysine, exerts a significant inhibition in vitro on the homocitric acid-synthesizing activity. Enzymes following the α-aminoadipic acid step respond in a noncoordinate fashion to hydroxylysine. Level of the enzyme saccharopine reductase, but not of α-aminoadipic acid reductase or saccharopine dehydrogenase, is reduced significantly. These regulatory effects of hydroxylysine are similar to those observed for lysine.

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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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