V-set domain-containing T-cell activation inhibitor 1; also known as B7X; B7H4; B7S1; and VTCN1; is a single-pass type? membrane protein belonging to the B7 family of costimulatory proteins. These proteins are expressed on the surface of antigen-presenting cells and interact with ligands on T lymphocytes. They provide costimulatory signals that regulate T cell responses. A soluble form of B7H4 has also been detected. B7X / VTCN1 / B7H4 negatively regulates T-cell-mediated immune response by inhibiting T-cell activation; proliferation; cytokine production and development of cytotoxicity. When expressed on the cell surface of tumor macrophages; B7X / VTCN1 / B7H4 plays an important role; together with regulatory T-cells(Treg); in the suppression of tumor-associated antigen-specific T-cell immunity. B7X / VTCN1 / B7H4 is also involved in promoting epithelial cell transformation. This membrane protein can be up-regulated by IL6 / interleukin-6 and IL10 / interleukin-10 and inhibited by CSF2 / GM-CSF and IL4 / interleukin-4 on antigen-presenting cells.
Product Name:
Human B7-H4/VTCN1 Recombinant Protein (RPES3199)
Product Code:
RPES3199
Size:
50µg
Species:
Human
Expressed Host:
HEK293 Cells
Synonyms:
B7S1, B7x, Vtcn1, B7h.5, B7-H4, B7H4T-cell costimulatory molecule B7x, B7S1VCTN1, B7XPRO1291, FLJ22418, Immune costimulatory protein B7-H4, Protein B7S1, T cell costimulatory molecule B7x, V-set domain containing T cell activation inhibitor 1, V-set domain-containing T-cell activation inhibitor 1
Accession:
Q7Z7D3
Sequence:
Phe29-Ala258
Fusion tag:
C-His
Endotoxin:
<1.0 EU per µg of the protein as determined by the LAL method.
Protein Construction:
A DNA sequence encoding the human VTCN1(Q7Z7D3) (Phe29-Ala258) with a C-terminal polyhistidine tag was expressed.
Purity:
> 95 % as determined by reducing SDS-PAGE.
Mol Mass:
26.8 kDa
AP Mol Mass:
43-48 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.
