C1235

Cholesterol Oxidase microbial

Name: Cholesterol Oxidase microbial
Brand: SIGMA
Price: 235.45 USD
Availability: InStock

recombinant, lyophilized powder, ≥10 units/mg protein

Synonym(s):

Cholesterol: oxygen oxidoreductase

Slide 1 of 1

Select a Size

100 UNITS

$235.45

List Price$277.00Save 15%

Available to ship TODAYDetails

About This Item

CAS Number:

9028-76-6

NACRES:

NA.54

UNSPSC Code:

12352204

EC Number:

232-842-1

MDL number:

MFCD00130783

EC Number:

1.1.3.6 (BRENDA, IUBMB)

Key Documents

View All Documentation

Product Name

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

200

Compare Similar Items

View Full Comparison

Show Differences

1 of 4

This Item	C8868	C5421	C8649
Sigma-Aldrich C1235 Cholesterol Oxidase microbial	Sigma-Aldrich C8868 Cholesterol Oxidase from microorganisms	Sigma-Aldrich C5421 Cholesterol Oxidase from microorganisms	Sigma-Aldrich C8649 Cholesterol Oxidase from Streptomyces sp.
specific activity ≥10 units/mg protein	specific activity ≥50 units/mg protein	specific activity ≥30 units/mg protein (biuret)	specific activity ≥20 units/mg protein
form lyophilized powder	form lyophilized powder	form aqueous solution	form lyophilized powder
solubility 50 mM potassium phosphate buffer, pH 7.0: soluble	solubility -	solubility 50 mM potassium phosphate buffer, pH 7.0: soluble (Cold)	solubility 50 mM potassium phosphate buffer, pH 7.0: soluble (Cold)
storage temp. −20°C	storage temp. −20°C	storage temp. −70°C	storage temp. −20°C
mol wt 55 kDa	mol wt 64 kDa	mol wt 62 kDa	mol wt ~34 kDa
Quality Level 200	Quality Level 200	Quality Level 200	Quality Level 200

Application

Cholesterol oxidase is used to determine serum cholesterol.[1][2] The enzyme also finds application in the microanalysis of steroids in food samples and in distinguishing 3-ketosteroids from 3b-hydroxysteroids.[3] Transgenic plants expressing cholesterol oxidase are being investigated in the fight against the cotton boll weevil.[4] CHOD has also been used as a molecular probe to elucidate cellular membrane structures.[5][6]

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.

pictograms

GHS08

signalword

Danger

hcodes

H334

pcodes

P261 - P284 - P501

Hazard Classifications

Resp. Sens. 1

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Cholesterol-rich fluid membranes solubilize ceramide domains: implications for the structure and dynamics of mammalian intracellular and plasma membranes.

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)

Electro-chemiluminescent biosensing.

Christophe A Marquette et al.

Analytical and bioanalytical chemistry, 390(1), 155-168 (2007-10-03)

The present review draws a general picture of the bioanalytical applications of electro-chemiluminescent reactions (ECL). Only the two main ECL reactions-i.e. the luminol-based and Ru(bpy)(3)(2+)-based reactions-are considered for application in the fields of enzyme biosensors, immunochemical biosensors, DNA biosensors, and

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)

Performance of four sources of cholesterol oxidase for serum cholesterol determination by the enzymatic endpoint method.

Porntip H Lolekha et al.

Clinica chimica acta; international journal of clinical chemistry, 339(1-2), 135-145 (2003-12-23)

Cholesterol oxidase is used for the determination of serum cholesterol. It can be derived from Streptomyces, Pseudomonas fluorescens, Cellulomonas, and Brevibacterium. This study compared the performance characteristics of four enzymes in the endpoint cholesterol determination. Using the Mega analyzer, we

Continuous steroid biotransformations in microchannel reactors.

Marco P C Marques et al.

New biotechnology, 29(2), 227-234 (2011-10-20)

The use of microchannel reactor based technologies within the scope of bioprocesses as process intensification and production platforms is gaining momentum. Such trend can be ascribed a particular set of characteristics of microchannel reactors, namely the enhanced mass and heat

View All Related Papers

Protocols

Enzymatic Assay of Cholesterol Oxidase

Enzymatic activity assay for cholesterol oxidase, excluding specific product numbers, providing guidelines for accurate cholesterol oxidase assays.

Questions

Reviews

No rating value

Active Filters

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service