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Title: Purification and properties of saccharopine dehydrogenase (glutamate forming) in the Saccharomyces cerevisiae lysine biosynthetic pathway. Author: Storts DR, Bhattacharjee JK. Journal: J Bacteriol; 1987 Jan; 169(1):416-8. PubMed ID: 3098733. Abstract: Saccharopine dehydrogenase (glutamate forming) of the biosynthetic pathway of lysine in Saccharomyces cerevisiae was purified 1,122-fold by using acid precipitation, ammonium sulfate precipitation, DEAE-Sepharose, gel filtration, and Reactive Red-120 agarose chromatography. The enzyme exhibited a native molecular size of 69,000 daltons by gel filtration and consisted of a single 50,000-dalton polypeptide based upon sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The enzyme was readily denatured by exposures to temperatures exceeding 46 degrees C. The pH optimum for the reverse reaction was 9.5. The apparent Kms for L-saccharopine and NAD+ were 2.32 and 0.054 mM, respectively. The enzyme was inhibited by mercuric chloride but not by carbonyl or metal complexing agents.[Abstract] [Full Text] [Related] [New Search]