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Merck
CN

475911

Myeloperoxidase, Human Polymorphonuclear Leukocytes

A lysosomal enzyme that catalyzes oxidations by hydrogen peroxide, including MPO-chloride-mediated killing of microbes and tumor cells, inactivation of chemotactic factors, and cross-linking of proteins.

Synonym(s):

Myeloperoxidase, Human Polymorphonuclear Leukocytes, MPO

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About This Item

CAS Number:
9003-99-0
EC Number:
1.11.1.7 (BRENDA, IUBMB)
MDL number:
MFCD00071339
UNSPSC Code:
12352202
NACRES:
NA.25
Specific activity:
150-200 units/mg protein
Assay:
≥95% (SDS-PAGE)
Biological source:
human

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SMILES string

[O+H2]O[O-]

InChI

1S/H2O3/c1-3-2/h1-2H

InChI key

JSPLKZUTYZBBKA-UHFFFAOYSA-N

biological source

human

assay

≥95% (SDS-PAGE)

form

lyophilized

specific activity

150-200 units/mg protein

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze

solubility

water: soluble (volume is lot-specific and can be found on the product label)

shipped in

wet ice

storage temp.

−20°C

Quality Level

200

General description

Native, human myeloperoxidase from polymorphonuclear leukocytes. A lysosomal enzyme that catalyzes oxidations by hydrogen peroxide, including MPO-chloride-mediated killing of microbes and tumor cells, inactivation of chemotactic factors, and cross-linking of proteins. MPO catalyzes the formation of hypochlorous acid that kills bacteria either by binding the halide ion to intracellular constituents or by oxidation of bacterial lipids and proteins.

Physical form

Lyophilized from 100-700 mM NaCl, 50 mM sodium acetate buffer, pH 6.0.

Preparation Note

Following reconstitution, aliquot and freeze (-20°C or -70°C). Stock solutions are stable for up to 1 year at -20°C or -70°C.
Further dilute in 100 mM NaCl, 50 mM sodium acetate, pH 6.0. Enzyme may precipitate out of solution in low ionic strength buffers or in distilled H₂O.

Other Notes

Nauseef, W.M., et al. 1998. J. Leukocyte Biol. 63, 264.
Panasenko, O.M., et al. 1994. Free Radic. Biol. Med. 16, 143.
Mulligan, M.S., et al. 1992. Br. J. Pharmacol.107, 1159.
Sharonov, B.P., and Churilova, I.V. 1992. Biochem. Biophys. Res. Commun.189, 1129.
One unit is defined as the amount of enzyme that will reduce 1.0 µmol H₂O₂ per min at 25°C, pH 6.0.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Disclaimer

Toxicity: Standard Handling (A)

pictograms

Health hazard
GHS08

signalword

Danger

hcodes

H334

Hazard Classifications

Resp. Sens. 1

Storage Class

11 - Combustible Solids

wgk

WGK 1

Certificates of Analysis (COA)

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Shobini Jayaraman et al.
Biochimica et biophysica acta. Molecular and cell biology of lipids, 1865(8), 158712-158712 (2020-04-15)
Low-density lipoprotein (LDL) binding to arterial proteoglycans initiates LDL retention and modification in the arterial wall, triggering atherosclerosis. The details of this binding, its effectors, and its ramifications are incompletely understood. We combined heparin affinity chromatography with biochemical, spectroscopic and

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