Name : Human NKG2A&CD94 Protein

Product Source :
Recombinant Human NKG2A&CD94 Protein is expressed from HEK293 with mFc (IgG1) tag at the C-Terminus. It contains Arg100-Leu233(NKG2A)&Ser34-Ile179(CD94).[Accession | P26715-1(NKG2A)&Q13241-1(CD94)]

Molecular Weight :
The protein has a predicted MW of 56.9 kDa. Due to glycosylation, the protein migrates to 70-90 kDa based on Tris-Bis PAGE result.

Endotoxin Level :
Less than 1EU per μg by the LAL method.

Purity :
> 95% as determined by Tris-Bis PAGE> 95% as determined by HPLC

Formulation :
Lyophilized from 0.22μm filtered solution in PBS (pH 7.4). Normally 8% trehalose is added as protectant before lyophilization.

Reconstitution :
Centrifuge the tube before opening. Reconstituting to a concentration more than 100 μg/ml is recommended. Dissolve the lyophilized protein in distilled water.

Storage and Stability :
-20 to -80°C for 12 months as supplied from date of receipt. -80°C for 3-6 months after reconstitution. 2-8°C for 2-7 days after reconstitution. Recommend to aliquot the protein into smaller quantities for optimal storage. Please minimize freeze-thaw cycles.

Product Concentration :
Tris-Bis PAGE Human NKG2A&CD94 on Tris-Bis PAGE under reduced condition. The purity is greater than 95%. SEC-HPLC The purity of Human NKG2A&CD94 is greater than 95% as determined by SEC-HPLC. ELISA Data Immobilized Human NKG2A&CD94, mFc Tag at 0.5μg/ml (100μl/well) on the plate. Dose response curve for Anti-NKG2A Antibody, hFc Tag with the EC50 of 12.4ng/ml determined by ELISA (QC Test). Blocking Data Serial dilutions of Anti-NKG2A Antibody were added into Biotinylated Human HLA-E*01:03 Complex Tetramer, His Tag : Human NKG2A&CD94, mFc Tag binding reactioins. The half maximal inhibitiory concentration (IC50) is 0.15μg/ml. SPR Data Human NKG2A&CD94, mFc Tag captured on CM5 Chip via Anti-mouse Antibody can bind Human HLA-E Complex Tetramer, His Tag with an affinity constant of 7.90 nM as determined in SPR assay (Biacore T200).

Background :
The ligand-receptor assignment between HLA-G and NKG2A/CD94 is dependent of the amino acid composition in the HLA-G heavy chain. Understanding the biophysical basis of receptor-mediated events that lead to NK cell inhibition would help to remove non-tumor reactive cells and support personalized mild autologous NK cell therapies.

Synonyms :
CD159a; NKG2A; NKG2-A; CD94; NKG2A&CD94

References & Citations :
(1) Hò GT, Celik AA, Huyton T, Hiemisch W, Blasczyk R, Simper GS, Bade-Doeding C. NKG2A/CD94 Is a New Immune Receptor for HLA-G and Distinguishes Amino Acid Differences in the HLA-G Heavy Chain. Int J Mol Sci. 2020 Jun 19;21(12):4362. doi: 10.3390/ijms21124362. PMID: 32575403; PMCID: PMC7352787.

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