C1235
Cholesterol Oxidase microbial
recombinant, lyophilized powder, ≥10 units/mg protein
别名:
Cholesterol: oxygen oxidoreductase
产品名称
Cholesterol Oxidase microbial, recombinant, lyophilized powder, ≥10 units/mg protein
form
lyophilized powder
specific activity
≥10 units/mg protein
mol wt
55 kDa
solubility
50 mM potassium phosphate buffer, pH 7.0: soluble
storage temp.
−20°C
Quality Level
Application
Cholesterol oxidase is used to determine serum cholesterol. The enzyme also finds application in the microanalysis of steroids in food samples and in distinguishing 3-ketosteroids from 3b-hydroxysteroids. Transgenic plants expressing cholesterol oxidase are being investigated in the fight against the cotton boll weevil. CHOD has also been used as a molecular probe to elucidate cellular membrane structures.
Biochem/physiol Actions
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. This is subsequently isomerized to cholest-4-en-3-one with the release of H2O2. Optimum pH of the enzyme is 7.0. Hg2+, Ag+, ionic detergents inhibit the enzyme activity.
Other Notes
One unit will convert 1.0 μmol of cholesterol to 4-cholesten-3-one per minute at 37 °C and pH 7.0 in a peroxidase linked system.
Preparation Note
Dissolves in cold 50 mM potassium phosphate buffer, pH 7.0. Solution is to be prepared just before use.
signalword
Danger
hcodes
pcodes
Hazard Classifications
Resp. Sens. 1
存储类别
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
法规信息
新产品
此项目有
Bruno M Castro et al.
The Journal of biological chemistry, 284(34), 22978-22987 (2009-06-13)
A uniquely sensitive method for ceramide domain detection allowed us to study in detail cholesterol-ceramide interactions in lipid bilayers with low (physiological) ceramide concentrations, ranging from low or no cholesterol (a situation similar to intracellular membranes, such as endoplasmic reticulum)
Effect of cholesterol concentration on organization of viral and vesicle membranes. Probed by accessibility to cholesterol oxidase.
R Pal et al.
The Journal of biological chemistry, 255(12), 5802-5806 (1980-06-25)
Mitsutoshi Toyama et al.
Protein engineering, 15(6), 477-484 (2002-06-26)
Despite the structural similarities between cholesterol oxidase from Streptomyces and that from Brevibacterium, both enzymes exhibit different characteristics, such as catalytic activity, optimum pH and temperature. In attempts to define the molecular basis of differences in catalytic activity or stability
D R Corbin et al.
Plant physiology, 126(3), 1116-1128 (2001-07-18)
Cholesterol oxidase represents a novel type of insecticidal protein with potent activity against the cotton boll weevil (Anthonomus grandis grandis Boheman). We transformed tobacco (Nicotiana tabacum) plants with the cholesterol oxidase choM gene and expressed cytosolic and chloroplast-targeted versions of
Marcos Eguílaz et al.
Analytical chemistry, 83(20), 7807-7814 (2011-09-13)
The design of a novel biosensing electrode surface, combining the advantages of magnetic ferrite nanoparticles (MNPs) functionalized with glutaraldehyde (GA) and poly(diallyldimethylammonium chloride) (PDDA)-coated multiwalled carbon nanotubes (MWCNTs) as platforms for the construction of high-performance multienzyme biosensors, is reported in
实验方案
Enzymatic activity assay for cholesterol oxidase, excluding specific product numbers, providing guidelines for accurate cholesterol oxidase assays.
本操作流程使用过氧化物酶和邻联二茴香胺在500nm处进行胆固醇氧化酶活性的测定。胆固醇氧化酶是一种以氧为受体而作用于供体的CH-OH基团的酶。
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