C3172
Creatininase from microorganisms
lyophilized powder, 100-300 units/mg protein
Synonyme(s) :
Creatinine Amidohydrolase
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About This Item
Produits recommandés
Forme
lyophilized powder
Niveau de qualité
Activité spécifique
100-300 units/mg protein
Poids mol.
~175 kDa
Composition
Protein, 65-85%
Activité étrangère
Creatinase and urease ≤1%
Hexokinase and ATPase ≤0.1%
Température de stockage
2-8°C
Application
Creatininase from microorganisms may be used in the preparation of amperometric biosensor by co-immobilization with other enzymes for the determination of creatinine.
This enzyme is useful for enzymatic determination of creatinine when coupled with creatine amidinohydrolase, sarcosine dehydrogenase or sarcosine oxidase and formaldehyde dehydrogenase in clinical analysis.
Actions biochimiques/physiologiques
Creatininase from Pseudomonas sp. is a homohexameric enzyme with a molecular mass of 28.4 kDa per subunit. It is a cyclic amidohydrolase catalysing the reversible conversion of creatinine to creatine. Each monomer contains a binuclear zinc centre near the C termini of the β-strands and the N termini of the main α-helices. These zinc ions indicate the location of the active site.
Propriétés physiques
Isoelectric point:4.7
Michaelis constants:3.2 x 10‾2M (Creatinine), 5.7 x 10‾2M (Creatine)
Structure:6 subunits per mol of enzyme (One mol of zinc is bound to each subunit)
Inhibitors:Ag+, Hg++, N-bromosuccinimide, EDTA
Optimum pH:6.5 − 7.5
Optimum temp:70°C
pH Stability:pH 7.5 − 9.0 (5°C, 16hr)
Thermal stability:Below 70°C (pH 7.5, 30 min)
Michaelis constants:3.2 x 10‾2M (Creatinine), 5.7 x 10‾2M (Creatine)
Structure:6 subunits per mol of enzyme (One mol of zinc is bound to each subunit)
Inhibitors:Ag+, Hg++, N-bromosuccinimide, EDTA
Optimum pH:6.5 − 7.5
Optimum temp:70°C
pH Stability:pH 7.5 − 9.0 (5°C, 16hr)
Thermal stability:Below 70°C (pH 7.5, 30 min)
Définition de l'unité
One unit will hydrolyze 1.0 μmole of creatinine to creatine per min at pH 8.0 and 25 °C
Forme physique
Lyophilized powder containing sucrose and BSA as stabilizers
Remarque sur l'analyse
Protein determined by biuret.
Mention d'avertissement
Danger
Mentions de danger
Conseils de prudence
Classification des risques
Resp. Sens. 1
Code de la classe de stockage
11 - Combustible Solids
Classe de danger pour l'eau (WGK)
WGK 3
Point d'éclair (°F)
Not applicable
Point d'éclair (°C)
Not applicable
Équipement de protection individuelle
Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)
Certificats d'analyse (COA)
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Journal of molecular biology, 337(2), 399-416 (2004-03-09)
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Protocoles
Assay Procedure for Creatininase
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