Preparation of L-threonine by mutants of Corynebacterium.
نویسندگان
چکیده
منابع مشابه
Production of L-threonine by auxotrophic mutants of Escherichia coli.
Two auxotrophic mutants of Escherichia coli have been shown to accumulate significant amounts of l-threonine in the culture medium. One mutant, 13071, is deficient in alpha,epsilon-diaminopimelic acid (DAP), and the other, 13070, is deficient in both DAP and methionine. Accumulation of l-threonine by 13071 in a synthetic medium with mannitol as the carbon source at 37 C incubation temperature w...
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Use of Feedback-Resistant Threonine Dehydratases of Corynebacterium glutamicum To Increase Carbon Flux towards l-Isoleucine.
The biosynthesis of l-isoleucine proceeds via a highly regulated reaction sequence connected with l-lysine and l-threonine synthesis. Using defined genetic Corynebacterium glutamicum strains characterized by different fluxes through the homoserine dehydrogenase reaction, we analyzed the influence of four different ilvA alleles (encoding threonine dehydratase) in vectors with two different copy ...
متن کاملIsolation and Properties of a Homogeneous Preparation of Cystathionine Synthetase-l-serine and L-threonine Dehydratase.
Selim and Greenberg (1, 2) achieved a considerable degree of purification of L-serine dehydratase (L-serine hydro-lyase (deaminating), EC 4.2.1.13) from rat liver and demonstrated that this protein preparation contained the cystathionine-synthesizing activity of the liver (L-serine hydro-lyase (adding L-homocysteine), EC 4.2.1.21). These workers (2) also observed activity of their enzyme prepar...
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ژورنال
عنوان ژورنال: Kvasny Prumysl
سال: 1986
ISSN: 0023-5830
DOI: 10.18832/kp1986049