M6908
Myeloperoxidase from human leukocytes
lyophilized powder, ≥50 units/mg protein
Synonym(s):
MPO, Peroxidase, myelo
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About This Item
CAS Number:
MDL number:
UNSPSC Code:
12352200
NACRES:
NA.32
biological source
human leucocytes
Quality Level
form
lyophilized powder
specific activity
≥50 units/mg protein
solubility
H2O: soluble
aqueous buffers such as 50 mM sodium acetate: soluble (Freezing of the enzyme in solution may result in a substantial loss of activity.)
UniProt accession no.
shipped in
dry ice
storage temp.
−20°C
SMILES string
[O+H2]O[O-]
InChI
1S/H2O3/c1-3-2/h1-2H
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General description
Myeloperoxidase (MPO) is encoded by the gene mapped to human chromosome 17q22-24. The encoded protein is a leukocyte-derived enzyme and is an integral constituent of the innate immune response. MPO belongs to the heme peroxidase superfamily. MPO is a heme protein containing iron and is highly expressed in leukocytes, neutrophils, monocytes and some subtypes of tissue macrophages.
Application
Myeloperoxidase (MPO) from human leukocytes has been used in MPO assay.
Myeloperoxidase from human leukocytes has been used:
- as a standard to quantify the neutrophil (polymorphonuclear cell [PMN]) infiltration in lung tissue
- as a neutrophil extracelullar trap (NET) component to stimulate 106 dendritic cells or 106 macrophages
- as a standard in myeloperoxidase (MPO) assay to measure pancreatic MPO
Biochem/physiol Actions
Myeloperoxidase (MPO) has a crucial role to play in destruction of various microorganisms and foreign cells, such as bacteria, fungi, viruses, red cells and malignant and nonmalignant nucleated cells. MPO catalyzes the production of number of reactive oxidant species (ROS) that influence tissue damage during inflammation. MPO and its downstream inflammatory pathways function as a potent therapeutic target for prophylaxis of atherosclerotic cardiovascular disease. MPO catalyze the synthesis of polychlorinated dibenzo(p)dioxins and furans (PCDD/F) from precursor such as chlorophenols in presence of hydrogen peroxide (H2O2).
Other Notes
Lysosomal heme-containing protein.
Unit Definition
One unit of myeloperoxidase will catalyze the consumption of one micromole of hydrogen peroxide and the production of 1/4 micromole of tetraguaiacol per minute at pH 7.0 and 25 °C
Physical form
Lyophilized from 50 mM sodium acetate buffer, pH 6.0, 0.1 M sodium chloride
Analysis Note
Source material tested and found negative for antibody to HIV and for HBSAG.
Storage Class Code
11 - Combustible Solids
WGK
WGK 1
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
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