Technical Data
Lipoxygenase, 5-, phosphorylated (Ser523) (5-Lipoxygenase, 5-LO, 5-LOX, 5LPG, Arachidonate 5-Lipoxygenase, ALOX5, LOG5, MGC163204)
The enzyme 5-lipoxygenase (5-LO) plays a key role in regulating the production of leukotrienes (LTs) (Funk, 2001). Overproduction of LTs contributes to several diseases, most notably chronic inflammatory diseases, including asthma (Drazen et al., 1994), fibrosis (Wilborn et al., 1996) and atherosclerosis (Dwyer et al., 2004). Recent work has demonstrated that the activity of 5-LO is regulated by PKA phosphorylation of serine-523 in 5-LO (Luo et al., 2004). Under normal conditions, this phosphorylation may be important in limiting inflammation. Abnormal signaling through cAMP and PKA, then, could contribute to a variety of diseases, including those characterized by chronic inflammation. The phospho-specific antibody to Ser523 on 5-LO is thus likely to provide a valuable toll for studies of the role of 5-LO regulation in diseases such as asthma, fibrosis and atherosclerosis.

Suitable for use in Western Blot. Other applications not tested.

Recommended Dilution:
Western Blot: 1:1000
Optimal dilutions to be determined by the researcher.

Positive Control:
Human embryonic kidney cell (HEK) lysate

Storage and Stability:
May be stored at 4C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20C. Aliquots are stable for 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
PabIgGAffinity Purified
100ul-20CBlue IceHumanRabbit
Not determined
Phosphopeptide corresponding to amino acid residues surrounding the phosphorylated (Ser523) of human 5-Lipoxygenase.
Purified by immunoaffinity chromatography.
Supplied as a liquid 10mM HEPES, pH 7.5, 150mM sodium chloride, 100ug per ml BSA, 50% glycerol.
Recognizes human 5-Lipoxygenase, phosphorylated at (Ser523).
Intended for research use only. Not for use in human, therapeutic, or diagnostic applications.
1. Drazen JM, Lilly CM, Sperling R, Rubin P, Israel E (1994) Role of cysteinyl leukotrienes in spontaneous asthmaticresponses. Adv. Prostaglandin Thromboxane Leukot Res 22:251-262. 2. Dwyer JH, Allayee H, Dwyer KM, Fan J, Wu H, Mar R, Lusis AJ, Mehrabian M (2004) Arachidonate 5-lipoxygenasepromoter genotype, dietary arachidonic acid, and atherosclerosis. New England J Med 350:29-37. 3. Funk, CD (2001) Prostaglandins and leukotrienes: advances in eicosanoid biology. Science 294:1871-1875. 4. Luo M, Jones SM, Phare SM, Coffey MJ, Peters-Golden M, Brock TG (2004) Protein kinase A inhibits leukotrienesynthesis by phosphorylation of 5-lipoxygenase on Serine 523. J Biol Chem 279:41,512-41,520. 5. Wilborn J, Bailie M, Coffey M, Burdick M, Strieter R, Peters-Golden M. (1996) Constitutive activation of 5-lipoxygenase in the lungs of patients with idiopathic pulmonary fibrosis. J Clin Invest 97:1827-1836.