A7653
L-Alanine Dehydrogenase from Bacillus subtilis
buffered aqueous glycerol solution, ~30 units/mg protein (Lowry)
Synonyme(s) :
L-Alanine: NAD+ oxidoreductase (deaminating)
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A propos de cet article
Numéro CAS:
UNSPSC Code:
12352204
NACRES:
NA.54
EC Number:
232-847-9
MDL number:
Specific activity:
~30 units/mg protein (Lowry)
Biological source:
Bacillus subtilis
Service technique
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Bacillus subtilis
Quality Segment
form
buffered aqueous glycerol solution
specific activity
~30 units/mg protein (Lowry)
foreign activity
LDH ~1% (using pyruvate as substrate)
storage temp.
−20°C
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 .
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. 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.
Physical form
Solution in 50% glycerol containing 10 mM potassium phosphate buffer, pH 7.7
Other Notes
One unit will convert 1.0 μmole of L-alanine to pyruvate and NH3 per min at pH 10.0 at 25 °C.
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Resp. Sens. 1
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10 - Combustible liquids
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