Mouse Myeloperoxidase/MPO Biotinylated Antibody Summary
Met16-Thr718
Accession # AAR99349
Applications
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
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Preparation and Storage
- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: Myeloperoxidase/MPO
Myeloperoxidase (MPO) is a heme-containing enzyme belonging to the XPO subfamily of peroxidases. It is an abundant neutrophil and monocyte glycoprotein that catalyzes the hydrogen peroxide-dependent conversion of chloride, bromide, and iodide to multiple reactive species (1). Post-translational processing of human MPO involves the insertion of a heme moiety and the proteolytic removal of both a propeptide and a 6 aa internal peptide (2). This results in a disulfide-linked dimer composed of a 60 kDa heavy and 12 kDa light chain that associate into a 150 kDa enzymatically active tetramer. The tetramer contains two heme groups and one disulfide bond between the heavy chains (2). Mouse and human MPO share 87% aa sequence identity. MPO activity results in protein nitrosylation and the formation of 3‑chlorotyrosine and dityrosine crosslinks (4‑6). Modification of ApoB100, as well as the lipid and cholesterol components of LDL and HDL, promotes the development of atherosclerosis (5, 7‑9). MPO is also associated with a variety of other diseases (1), and inhibits vasodilation in inflammation by depleting the levels of NO (10). Serum albumin functions as a carrier protein during MPO movement to the basolateral side of epithelial cells (11). MPO is stored in neutrophil azurophilic granules. Upon cellular activation, it is deposited into pathogen‑containing phagosomes (2). While mice lacking MPO are impaired in clearing select microbial infections, MPO deficiency in humans does not necessarily result in heightened susceptibility to infections (12, 13).
- Klebanoff, S.J. (2005) J. Leukoc. Biol. 77:598.
- Hansson, M. et al. (2006) Arch. Biochem. Biophys. 445:214.
- Hashinaka, K. et al. (1988) Biochemistry 27:5906.
- van Dalen, C.J. et al. (2000) J. Biol. Chem. 275:11638.
- Hazen, S.L. and J.W. Heinecke (1997) J. Clin. Invest. 99:2075.
- Heinecke, J.W. et al. (1993) J. Clin. Invest. 91:2866.
- Podrez, E.A. et al. (1999) J. Clin. Invest. 103:1547.
- Bergt, C. et al. (2004) Proc. Natl. Acad. Sci. 101:13032.
- Hazen, S.L. et al. (1996) J. Biol. Chem. 271:23080.
- Eiserich, J.P. et al. (2002) Science 296:2391.
- Tiruppathi, C. et al. (2004) Proc. Natl. Acad. Sci. 101:7699.
- Aratani Y. et al. (2000) J. Infect. Dis. 182:1276.
- Kutter, D. (1998) J. Mol. Med. 76:669.
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