Name :
Recombinant Human B7-H7/HHLA2 Protein (ECD, hFc Tag)
Biological Activity :
Background :
B7H7 gene encodes a protein-ligand found on the surface of monocytes. The encoded protein is thought to regulate cell-mediated immunity by binding to a receptor on T lymphocytes and inhibiting the proliferation of these cells. Alternate splicing results in multiple transcript variants. HERV–H LTR-associating 2 (HHLA2, also called B7H7/B7-H5/B7y)has been recently discovered as the newest member of the B7 family and has 23–33% similarity in amino acid sequence with the other B7 molecules. This ligand is the only B7 family member that is found in humans but not in mice. It is constitutively expressed on the surface of human monocytes and is induced on B cells. HHLA2 binds to its putative receptor(s) on a variety of immune cells including CD4 and CD8 T cells and antigen-presenting cells. Similar to B7-H3, both a T cell coinhibitory role, as well as a costimulatory role, has been reported for this ligand. Cancer Immunotherapy Immune Checkpoint Immunotherapy Targeted Therapy
Biological Activity :
1.Measured by its binding ability in a functional ELISA. 2.Immobilized human TMIGD2(Cat:13820-H08H) at 10μg/mL (100μL/well) can bind human HHLA2-Fc(Cat:16139-H02H), the EC50 of human HHLA2-Fc is 0.3-3μg/mL.3.Loaded Recombinant Human KIR3DL3 Protein, His Tag (Cat. No. 16055-H08H) on His1K Biosensor, can bind Recombinant Human B7-H7/HHLA2 Protein, hFc Tag (Cat. No. 16139-H02H) with an affinity constant of 51.8 nM as determined in BLI assay (Sartorius Octet RED384) (Routinely tested).
Expression Host :
Human
Source :
HEK293 Cells
Tag :
Protein Accession No. :
NP_009003.1
NCBI Gene ID :
Synonyms :
Synonyms :
HERV-H LTR-associating 2
Amino Acid Sequence :
Molecular Weight :
The recombinant human HHLA2 consists 560 amino acids and predicts a molecular mass of 63.7 kDa.
Purity :
> 90 % as determined by SDS-PAGE.
State of Matter :
Product Concentration :
Storage and Stability :
Samples are stable for up to twelve months from date of receipt at -20℃ to -80℃. Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Endotoxin Level :
< 1.0 EU per μg protein as determined by the LAL method.
Protein Construction :
A DNA sequence encoding the human HHLA2 (NP_009003.1) (Met1-Asn344) was expressed with the Fc region of human IgG1 at the C-terminus.
Buffer Solution :
Lyophilized from sterile PBS, pH 7.4.Please contact us for any concerns or special requirements. Normally 5 % – 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Please refer to the specific buffer information in the hardcopy of datasheet.
Shipping :
In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Redissolution :
A hardcopy of datasheet with reconstitution instructions is sent along with the products. Please refer to it for detailed information.
Synonyms :
B7-H7 Protein, Human; B7H7 Protein, Human; HHLA2 Protein, Human B7-H7/HHLA2 背景信息 B7H7 gene encodes a protein-ligand found on the surface of monocytes. The encoded protein is thought to regulate cell-mediated immunity by binding to a receptor on T lymphocytes and inhibiting the proliferation of these cells. Alternate splicing results in multiple transcript variants. HERV–H LTR-associating 2 (HHLA2, also called B7H7/B7-H5/B7y)has been recently discovered as the newest member of the B7 family and has 23–33% similarity in amino acid sequence with the other B7 molecules. This ligand is the only B7 family member that is found in humans but not in mice. It is constitutively expressed on the surface of human monocytes and is induced on B cells. HHLA2 binds to its putative receptor(s) on a variety of immune cells including CD4 and CD8 T cells and antigen-presenting cells. Similar to B7-H3, both a T cell coinhibitory role, as well as a costimulatory role, has been reported for this ligand. Cancer Immunotherapy Immune Checkpoint Immunotherapy Targeted Therapy
References & Citations :
Janakiram M, Chinai JM, Fineberg S, et al. Expression, clinical significance, and receptor identification of the newest B7 family member HHLA2 protein. Clinical cancer research : an official journal of the American Association for Cancer Research. 2015;21(10):2359-2366.
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