Leukotriene A-4 hydrolase; also known as LTA-4 hydrolase; Leukotriene A (4) hydrolase; LTA4H and LTA4; is cytoplasm protein which belongs to the peptidase M1 family. LTA4H hydrolyzes an epoxide moiety of leukotriene A4 (LTA-4) to form leukotriene B4 (LTB-4). This enzyme also has some peptidase activity. The leukotrienes (LTs) are a class of structurally related lipid mediators involved in the development and maintenance of inflammatory and allergic reactions. In the biosynthesis of LTs; arachidonic acid was converted into the unstable intermediate epoxide LTA4; which may in turn be conjugated with glutathione to form the spasmogenic LTC4; or hydrolyzed into the proinflammatory lipid mediator LTB4 in a reaction catalyzed by Leukotriene A4 hydrolase (LTA4H). LTB4 is a classical chemoattractant of human neutrophils and triggers adherence and aggregation of leukocytes to vascular endothelium; and also modulates immune responses. As a bifunctional zinc metalloenzyme; LTA4H also exhibits an anion-dependant arginyl aminopeptidase activity of high efficiency and specificity in addition to its epoxide hydrolase activity. LTA4H is regarded as a therapeutic target for inflammation.
Measured by its ability to agglutinate human red blood cells. The ED50 for this effect is typically 3-15 µg/ml.
Endotoxin:
<5 EU per 1 mg of the protein as determined by the LAL method.
Protein Construction:
A DNA sequence encoding the human Galectin3 (P17931) (Met 1-Ile 250) was expressed and purified.
Purity:
> 97 % as determined by reducing SDS-PAGE.
Mol Mass:
26.1 kDa
AP Mol Mass:
30 kDa
Formulation:
Lyophilized from sterile PBS; pH 7.4
Shipping:
This product is provided as lyophilized powder which is shipped with ice packs.
Stability and Storage:
Lyophilized proteins are stable for up to 12 months when stored at -20 to -80°C. Reconstituted protein solution can be stored at 4-8°C for 2-7 days. Aliquots of reconstituted samples are stable at < -20°C for 3 months.
