H8509
β-Hydroxybutyrate Dehydrogenase from Rhodopseudomonas sphaeroides
Type V, lyophilized powder, 250-750 units/mg protein
Synonym(s):
(R)-3-Hydroxybutanoate:NAD+ oxidoreductase, 3-HBDH
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About This Item
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type
Type V
Quality Level
form
lyophilized powder
specific activity
250-750 units/mg protein
purified by
chromatography
foreign activity
lactate dehydrogenase ≤0.05%
malate dehydrogenase ≤0.1%
storage temp.
−20°C
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Application
Suitable for the determination of acetoacetate and D(-)-3-hydroxybutyrate by the method of Williamson, D. H., and Mellanby, J., Methods of Enzymatic Analysis, Bergmeyer, H., ed., 2nd edition, 4, 1836 (1974).
Biochem/physiol Actions
In mammalian systems, β-hydroxybutyrate dehydrogenase is localized on the inner mitochondrial membrane and requires phosphatidyl choline for activity. In contrast, the enzyme from Rhodopseudomonas is a soluble cytosolic enzyme that does not require a phospholipid allosteric activator. The enzyme is required for the utilization of ketone bodies as a source of metabolic energy. It catalyzes the oxidation of 3-hydroxybutyrate to acetoacetate, the first step in the conversion of ketone bodies to citric acid, which is then further metabolized via the tricarboxylic acid cycle (Krebs cycle).
Unit Definition
One unit will oxidize 1.0 μmole of D-β-hydroxybutyrate to acetoacetate per min at pH 7.8 at 37 °C.
Physical form
Lyophilized powder containing Tris buffer salts
Storage Class Code
10 - Combustible liquids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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