1. Using the Octet RED System, the affinity constant (Kd) of CD73 Protein, Human, Recombinant (His Tag) bound MEDI9447 was 0.3 nM._x000D_ 2. Measured by its ability to hydrolyze the 5’phosphate group from the substrate adenosine 5’monophosphate (AMP). The specific activity is > 15,000 pmoles/min/μg.

CD73 Protein, Human, Recombinant (His) is expressed in HEK293 mammalian cells with His tag. The predicted molecular weight is 59.2 kDa and the accession number is P21589-1.

Human

HEK293 Cells

NTE,NT5,NT,eNT,eN,E5NT,CD73,CALJA,5'-nucleotidase, ecto (CD73)

A DNA sequence encoding the human NT5E (NP_002517.1) (Met1-Lys547) was expressed fused with a polyhistidine tag at the C-terminus. Predicted N terminal: Trp 27

> 85 % as determined by SDS-PAGE. > 95 % as determined by SEC-HPLC.

A Certificate of Analysis (CoA) containing reconstitution instructions is included with the products. Please refer to the CoA for detailed information.

It is recommended to store recombinant proteins at -20°C to -80°C for future use. Lyophilized powders can be stably stored for over 12 months, while liquid products can be stored for 6-12 months at -80°C. For reconstituted protein solutions, the solution can be stored at -20°C to -80°C for at least 3 months. Please avoid multiple freeze-thaw cycles and store products in aliquots.

5'-nucleotidase, also known as NT5E, NTE, and CD73, is a cell membrane protein that belongs to the 5'-nucleotidase family. CD73 is a glycosylphosphatidylinositol (GPI) anchored purine salvage enzyme expressed on the surface of human T and B lymphocytes. CD73 catalyzes the conversion of purine and pyrimidine ribo- and deoxyribonucleoside monophosphates to the corresponding nucleosides. CD73 serves as a costimulatory molecule in activating T cells. CD73 generated adenosine functions in cell signaling in many physiologic systems, including intestinal epithelium, ischemic myocardium, and cholinergic synapses. CD73 might mediate lymphocyte-stromal cell interactions or condition the local microenvironment to facilitate lymphocyte development and/or function. In CD73-depleted cells, surface levels of the leukocyte adhesion molecules ICAM-1, VCAM-1, and E-selectin increase. CD73 produces extracellular adenosine, which then acts on G protein-coupled purinergic receptors to induce cellular responses. CD73 has also been reported to regulate the expression of pro-inflammatory molecules in mouse endothelium.