Skip to Content
Merck
All Photos(6)

Key Documents

View All Documentation

C1403

Sigma-Aldrich

Cholesterol Esterase from Pseudomonas sp.

lyophilized powder, ≥200,000 units/g protein

Synonym(s):

Cholesterol Esterase from Pseudomonas fluorescens, Sterol-ester acylhydrolase

Sign Into View Organizational & Contract Pricing
All Photos(6)

About This Item

CAS Number:
9026-00-0
Enzyme Commission number:
3.1.1.13 (BRENDA, IUBMB)
EC Number:
232-808-6
MDL number:
MFCD00071052
UNSPSC Code:
12352204
NACRES:
NA.54

form

lyophilized powder

Quality Level

200

specific activity

≥200,000 units/g protein

mol wt

~300 kDa

composition

protein, ≥40% biuret

storage temp.

−20°C

Looking for similar products? Visit Product Comparison Guide

Application

This enzyme is useful for enzymatic determination of total cholesterol when coupled with cholesterol oxidase in clinical analysis.

Biochem/physiol Actions

Cholesterol esterase (CE) is a reversible enzyme that can hydrolyze or synthesize fatty acid esters of cholesterol and other sterols. Hydrolysis of water insoluble long chain fatty acid esters requires bile salt activation. Hydrolysis of water soluble esters of short chain fatty acids and lysophospholipids does not require activation by bile salts. It also hydrolyzes tri-, di-, and mono-acylglycerols, phospholipids, lysophospholipids, and ceramide. The enzyme may have multiple functions in lipid and lipoprotein metabolism, and atherosclerosis.

Physical properties

Stability: Stable at –20°C for at least one year
Isoelectric point: 5.9 ± 0.1
Michaelis constants: 5.4 x 10‾5M (Linoleate), 6.6 x 10‾5M (Oleate)
3.7 x 10‾5M (Linolenate), 1.5 x 10‾4M (Palmitate)
1.2 x 10‾4M (Myristate), 2.3 x 10‾5M (Stearate)
Inhibitors: Hg++, Ag+, ionic detergents
Optimum pH: 7.0 − 9.0
Optimum temp: 40°C
pH Stability: pH 5.0 − 9.0 (25°C, 24hr)
Thermal stability: Below 55°C (pH 7.5, 10min)

Unit Definition

One unit will hydrolyze 1.0 μmole of cholesteryl oleate to cholesterol and oleic acid per min at pH 7.0 at 37 °C in the presence of taurocholate.

Pictograms

Health hazard
GHS08

Signal Word

Danger

Hazard Statements

H334

Precautionary Statements

P261 - P284 - P501

Hazard Classifications

Resp. Sens. 1

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

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

Visit the Document Library

Javier Sánchez-Marco et al.
Biomedicines, 10(3) (2022-03-26)
Thioredoxin domain containing 5 (TXNDC5) is a protein disulfide isomerase involved in several diseases related to oxidative stress, energy metabolism and cellular inflammation. In a previous manuscript, a negative association between fatty liver development and hepatic Txndc5 expression was observed.
Pornpen Srisawasdi et al.
Journal of clinical laboratory analysis, 26(6), 420-430 (2012-11-13)
Accurate determination of cholesterol requires complete hydrolysis of cholesteryl esters and must be very fast for the kinetic cholesterol assay. We investigated the properties of cholesterol esterase derived from Pseudomonas fluorescens, Candida cylindracea, bovine pancreas, and porcine pancreas for cholesterol
Kevin R Shreder et al.
Bioorganic & medicinal chemistry letters, 22(17), 5748-5751 (2012-08-11)
KIAA1363 is a serine hydrolase whose activity has been shown to be positively associated with tumor cell invasiveness. Thus, inhibitors of KIAA1363 represent a novel targeted therapy approach towards cancer. AX11890 ((1-bromo-2-naphthyl) N,N-dimethylcarbamate) was identified as a KIAA1363 inhibitor with
David Y Hui et al.
Journal of lipid research, 43(12), 2017-2030 (2002-11-28)
Carboxyl ester lipase (CEL), previously named cholesterol esterase or bile salt-stimulated (or dependent) lipase, is a lipolytic enzyme capable of hydrolyzing cholesteryl esters, tri-, di-, and mono-acylglycerols, phospholipids, lysophospholipids, and ceramide. The active site catalytic triad of serine-histidine-aspartate is centrally
Yong-lan Huang et al.
Zhonghua er ke za zhi = Chinese journal of pediatrics, 50(8), 601-605 (2012-11-20)
To explore the clinical characteristics of Wolman disease and diagnostic methods using enzymatic and molecular analysis. Lysosomal acid lipase activity was measured using 4-methylumbelliferyl oleate in the leukocytes of an infant suspected of Wolman disease and LIPA gene mutational analysis
View All Related Papers

Articles

Cholesterol Esterification

Cholesterol esterification enhances transport efficiency in lipoproteins for increased blood stream transport.

Cholesterol Esterification

Cholesterol esterification enhances transport efficiency in lipoproteins for increased blood stream transport.

Cholesterol Esterification

Cholesterol esterification enhances transport efficiency in lipoproteins for increased blood stream transport.

Cholesterol Esterification

Cholesterol esterification enhances transport efficiency in lipoproteins for increased blood stream transport.

Protocols

Assay Procedure for Cholesterol Esterase

Protocol for Assay Procedure for Cholesterol Esterase

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