Recombinant Human B7-H7/HHLA2 Fc Chimera Protein, CF Summary
Details of Functionality |
Measured by its ability to inhibit anti-CD3 antibody induced IL-2 secretion in human T lymphocytes. The ED50 for this effect is 0.075-0.75 μg/mL. |
Source |
Human embryonic kidney cell, HEK293-derived human B7-H7/HHLA2 protein
Human B7-H7/HHLA2 (Ile23-Asn344) Accession # Q9UM44 |
IEGRMD |
Human IgG1 (Pro100-Lys330) |
N-terminus |
|
C-terminus |
|
|
Accession # |
|
N-terminal Sequence |
Ile23 |
Structure / Form |
Disulfide-linked homodimer |
Protein/Peptide Type |
Recombinant Proteins |
Gene |
HHLA2 |
Purity |
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain. |
Endotoxin Note |
<0.10 EU per 1 μg of the protein by the LAL method. |
Applications/Dilutions
Dilutions |
|
Theoretical MW |
64 kDa (monomer). Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors. |
SDS-PAGE |
90-100 kDa, reducing conditions |
Packaging, Storage & Formulations
Storage |
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 3 months, -20 to -70 °C under sterile conditions after reconstitution.
|
Buffer |
Lyophilized from a 0.2 μm filtered solution in PBS. |
Purity |
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain. |
Reconstitution Instructions |
Reconstitute at 100 μg/mL in PBS. |
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Human B7-H7/HHLA2 Fc Chimera Protein, CF
Background
B7-H7, also known as HHLA2 (HERV-H LTR-associating 2), is a member of the B7 family of immune regulatory proteins (1, 2). Mature human B7-H7 consists of a 322 amino acid (aa) extracellular domain (ECD) with three immunoglobulin-like domains, a 21 aa transmembrane segment, and a 49 aa cytoplasmic domain (3-5). B7‑H7 is constitutively expressed on monocytes and is up-regulated by LPS and IFN-gamma stimulation. It is expressed on LPS/IFN-gamma treated B cells but not on resting B cells (5). B7-H7 binds to cell surface determinants on resting and mature T cells, B cells, and monocytes as well as on immature and mature dendritic cells (5). Soluble B7-H7 inhibits the proliferation of activated CD4
+ and CD8
+ T cells and their production of IFN-gamma , TNF-alpha , IL-5, IL-10, IL-13, IL-17A, and IL-22 (5).
- Zou, W. and L. Chen (2008) Nat. Rev. Immunol. 8:467.
- Bour-Jordan, H. et al. (2011) Immunol. Rev. 241:180.
- Mager, D.L. et al. (1999) Genomics 59:255.
- Flajnik, M.M. et al. (2012) Immunogenetics 64:571.
- Zhao, R. et al. (2013) Proc. Natl. Acad. Sci. USA 110:9879.
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