C8649
Cholesterol Oxidase from Streptomyces sp.
lyophilized powder, ≥20 units/mg protein
Sinônimo(s):
Cholesterol: oxygen oxidoreductase
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About This Item
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fonte biológica
Streptomyces sp.
Formulário
lyophilized powder
atividade específica
≥20 units/mg protein
peso molecular
~34 kDa
composição
protein, 55-65% biuret
solubilidade
50 mM potassium phosphate buffer, pH 7.0: soluble (Cold)
Condições de expedição
dry ice
temperatura de armazenamento
−20°C
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Descrição geral
Aplicação
Cholesterol oxidase from Streptomyces has been used in a study to assess the relationship between the micellar structure of model bile and the activity of esterase. Cholesterol oxidase from Streptomyces has also been used in a study to investigate the effects of sphingomyelin degradation on cell cholesterol oxidizability and steady-state distribution between the cell surface and the cell interior.
Cholesterol oxidase is used to determine serum cholesterol.[3][4] The enzyme also finds application in the microanalysis of steroids in food samples and in distinguishing 3-ketosteroids from 3β-hydroxysteroids.[5] Transgenic plants expressing cholesterol oxidase are being investigated in the fight against the cotton boll weevil.[6] CHOD has also been used as a molecular probe to elucidate cellular membrane structures.[7][8]
Ações bioquímicas/fisiológicas
Cholesterol Oxidase from microorganisms use cholesterol for carbon and energy. It is useful in diagnostic assays involving cholesterol, especially in lipid disorders. Cholesterol oxidase has an insecticidal property and aids protection against boll weevil larvae.[2] The Streptomyces sp cholesterol oxidase has long shelf-life with good performance.[9]
Cholesterol oxidase (CHOD) is a monomeric flavoprotein containing FAD that catalyzes the first step in cholesterol catabolism. This bifunctional enzyme oxidizes cholesterol to cholest-5-en-3-one in an FAD-requiring step, which is then isomerized to cholest-4-en-3-one with the release of H2O2.[10]
propriedades físicas
Isoelectric point : 5.1 ± 0.1 and 5.4 ± 0.1
Michaelis constant : 4.3 x 10‾5M(Cholesterol)
Inhibitors : Ionic detergents, Hg++, Ag+
Optimum pH : 6.5 − 7.0
Optimum temperature : 45 – 50°C
pH Stability : pH 5.0 – 10.0 (25°C, 20hr)
Thermal stability : Below 45°C (pH 7.0, 15min)
Michaelis constant : 4.3 x 10‾5M(Cholesterol)
Inhibitors : Ionic detergents, Hg++, Ag+
Optimum pH : 6.5 − 7.0
Optimum temperature : 45 – 50°C
pH Stability : pH 5.0 – 10.0 (25°C, 20hr)
Thermal stability : Below 45°C (pH 7.0, 15min)
Definição da unidade
One unit will convert 1.0 μmole of cholesterol to 4-cholesten-3-one per min at pH 7.5 at 25 °C. Note: 4-cholesten-3-one may undergo isomerization.
forma física
lyophilized powder containing bovine serum albumin and amino acids as stabilizers
Nota de preparo
CHOD is soluble in cold 50 mM potassium phosphate buffer, pH 7.0. Prepare solutions immediately before use.
Palavra indicadora
Danger
Frases de perigo
Declarações de precaução
Classificações de perigo
Resp. Sens. 1
Código de classe de armazenamento
11 - Combustible Solids
Classe de risco de água (WGK)
WGK 3
Ponto de fulgor (°F)
Not applicable
Ponto de fulgor (°C)
Not applicable
Equipamento de proteção individual
Eyeshields, Gloves, type N95 (US)
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Extracellular cholesterol oxidase production by Streptomyces aegyptia, in vitro anticancer activities against rhabdomyosarcoma, breast cancer cell-lines and in vivo apoptosis
NEA El-Naggar, et al.
Scientific reports, 8(1), 2706-2706 (2018)
J P Slotte et al.
Biochimica et biophysica acta, 985(1), 90-96 (1989-10-02)
This study addresses questions related to (i) the distribution of cholesterol between the cell surface and intracellular membranes in cultured fibroblasts and (ii) the effects of plasma membrane sphingomyelin on this distribution. Cholesterol oxidase (Streptomyces sp.) converts cell cholesterol to
Hayoung Song et al.
Advanced science (Weinheim, Baden-Wurttemberg, Germany), 9(28), e2203597-e2203597 (2022-08-18)
Herein, a wireless and soft smart contact lens that enables real-time quantitative recording of cholesterol in tear fluids for the monitoring of patients with hyperlipidemia using a smartphone is reported. This contact lens incorporates an electrochemical biosensor for the continuous
Crystal structure determination of cholesterol oxidase from Streptomyces and structural characterization of key active site mutants
Yue QK, et al.
Biochemistry, 38(14), 4277-4286 (1999)
Laura Caldinelli et al.
The Journal of biological chemistry, 280(24), 22572-22581 (2005-04-09)
Cholesterol oxidase from Brevibacterium sterolicum is a monomeric flavoenzyme catalyzing the oxidation and isomerization of cholesterol to cholest-4-en-3-one. This protein is a class II cholesterol oxidases, with the FAD cofactor covalently linked to the enzyme through the His(69) residue. In
Protocolos
Protocol for Assay Procedure for Cholesterol Oxidase
Enzymatic activity assay for cholesterol oxidase, excluding specific product numbers, providing guidelines for accurate cholesterol oxidase assays.
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