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Merck
CN

26746

Cholesterol Oxidase from Nocardia erythropolis

in 1 M ammonium sulfate solution, pH 6, solution (slightly hazy), ≥15 U/mL

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About This Item

CAS Number:
UNSPSC Code:
12352204
EC Number:
232-842-1
MDL number:
EC Number:
Concentration:
≥15 U/mL
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form

solution (slightly hazy)

quality

in 1 M ammonium sulfate solution, pH 6

concentration

≥15 U/mL

color

pale yellow

storage temp.

2-8°C

Other Notes

1 U corresponds to the amount of enzyme which converts 1 μmol cholesterol to 4-cholesten-3-one per minute at pH 7.5 and 25 °C
Conversion of cholesterol to 4-cholesten-3-one; Isomerization of cholest-5-en-3-one to cholest-4-en-3-one; Properties and applications, minireview; Review in clinical biochemistry: The quantitative analysis of cholesterol.

pictograms

Health hazard

signalword

Danger

hcodes

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)

Regulatory Information

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The mechanism of the isomerization of Cholest-5-en-3-one to cholest-4-en-3-one by cholesterol oxidase [proceedings].
A G Smith et al.
Biochemical Society transactions, 5(4), 1088-1090 (1977-01-01)
Cholesterol oxidases: properties and applications.
A G Smith et al.
Journal of steroid biochemistry, 7(9), 705-713 (1976-09-01)
A G Smith et al.
The Biochemical journal, 167(1), 121-129 (1977-10-01)
1. 5-Cholesten-3-one was shown to be an intermediate in the conversion of cholesterol into 4-cholesten-3-one by Nocardia cholesterol oxidase. 2. The absence of a C-17 side chain from 5-androstene-3,17-dione slightly increased the Vmax. of the isomerase activity relative to 5-cholesten-3-one
Analytical reviews in clinical biochemistry: the quantitative analysis of cholesterol.
W Richmond
Annals of clinical biochemistry, 29 ( Pt 6), 577-597 (1992-11-01)
Tatyana V Ivashina et al.
The Journal of steroid biochemistry and molecular biology, 129(1-2), 47-53 (2011-10-22)
Fast-growing strain of Mycobacterium sp. VKM Ac-1815D is capable of effective oxidizing of sterols (phytosterol, cholesterol, ergosterol) to androstenedione and other valuable 3-oxo-steroids. To elucidate the role of cholesterol oxidase in sterol catabolism by the strain, the choD gene has

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