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General description
L-Alanine Dehydrogenase has a N-terminal substrate-binding domain and a C-terminal NAD-binding domain.
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 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
Suspension in 2.4 M (NH4)2SO4 solution, pH 7.0
Other Notes
One unit will convert 1.0 μmole of
| biological source | Bacillus subtilis |
| Quality Level | 200 |
| form | ammonium sulfate suspension |
| specific activity | ≥20 units/mg protein (Lowry) |
| storage temp. | 2-8°C |
| 长度(mm) | |
| 宽度(mm) | |
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| 重量(kg) |
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