A7653
L-Alanine Dehydrogenase from Bacillus subtilis
buffered aqueous glycerol solution, ~30 units/mg protein (Lowry)
Synonym(s):
L-Alanine: NAD+ oxidoreductase (deaminating)
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About This Item
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biological source
Bacillus subtilis
Quality Level
form
buffered aqueous glycerol solution
specific activity
~30 units/mg protein (Lowry)
foreign activity
LDH ~1% (using pyruvate as substrate)
storage temp.
−20°C
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Application
L-Alanine dehydrogenase converts L-alanine to pyruvate and ammonium. L-Alanine dehydrogenase from Bacillus subtilis may be used to study enzyme inactivation and protection [1].
Biochem/physiol Actions
L-Alanine dehydrogenase is an A-stereospecific dehydrogenase that catalyzes the reversible deamination of L-alanine to pyruvate and ammonium. It is important for the generation of pyruvate during sporulation. L-Alanine dehydrogenase from Bacillus subtilis has a predominately ordered kinetic mechanism in which NAD binds before L-alanine. Subsequently, ammonia, pyruvate, and NADH are released in that specific order.[1] Optimal pH for the amination reaction is 8.8-9.0, whereas it is 10-10.5 for the deamination reaction. The enzyme is inactivated by divalent metal ions and p-chloromercuribenzoate, mercuric ion being most effective. The inactivation may be reversed by L- or D-cysteine.[2]
Unit Definition
One unit will convert 1.0 μmole of L-alanine to pyruvate and NH3 per min at pH 10.0 at 25 °C.
Physical form
Solution in 50% glycerol containing 10 mM potassium phosphate buffer, pH 7.7
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Resp. Sens. 1
Storage Class Code
10 - Combustible liquids
WGK
WGK 3
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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D Delforge et al.
The Journal of biological chemistry, 272(4), 2276-2284 (1997-01-24)
L-Alanine dehydrogenase from Bacillus subtilis was inactivated with two different lysine-directed chemical reagents, i.e. 2,4, 6-trinitrobenzenesulfonic acid and N-succinimidyl 3-(2-pyridyldithio)propionate. In both cases, the inactivation followed pseudo first-order kinetics, with a 1:1 stoichiometric ratio between the reagent and the enzyme
Sivagamisundaram Chavadi et al.
Journal of bacteriology, 191(24), 7545-7553 (2009-10-13)
To better understand the global effects of "natural" lesions in genes involved in the pyruvate metabolism in Mycobacterium bovis, null mutations were made in the Mycobacterium tuberculosis H37Rv ald and pykA genes to mimic the M. bovis situation. Like M.
Roxane Lahmi et al.
Journal of bacteriology, 188(14), 5258-5265 (2006-07-04)
Degradation of the cyanobacterial light-harvesting antenna, the phycobilisome, is a general acclimation response that is observed under various stress conditions. In this study we identified a novel mutant of Synechococcus elongatus PCC 7942 that exhibits impaired phycobilisome degradation specifically during
Xueli Zhang et al.
Applied microbiology and biotechnology, 77(2), 355-366 (2007-09-18)
Escherichia coli W was genetically engineered to produce L: -alanine as the primary fermentation product from sugars by replacing the native D: -lactate dehydrogenase of E. coli SZ194 with alanine dehydrogenase from Geobacillus stearothermophilus. As a result, the heterologous alanine
A Sinem Ozyurt et al.
Proteins, 72(1), 184-196 (2008-01-25)
This study describes a method to computationally assess the function of homologous enzymes through small molecule binding interaction energy. Three experimentally determined X-ray structures and four enzyme models from ornithine cyclo-deaminase, alanine dehydrogenase, and mu-crystallin were used in combination with
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