Recombinant Human VISTA/B7-H5/PD-1H His-tag Protein, CF

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Recombinant Human VISTA/B7-H5/PD-1H inhibits anti-CD3antibody induced IL-2 secretion in human T lymphocytes. The ED50 for thiseffect is 0.5-3 μg/mL.

Product Details

Summary
Reactivity HuSpecies Glossary
Applications Bioactivity
Format
Carrier-Free

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Catalog# & Formulation Size Price

Recombinant Human VISTA/B7-H5/PD-1H His-tag 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 0.5-3 μg/mL.
Source
Mouse myeloma cell line, NS0-derived human VISTA/B7-H5/PD-1H protein
Phe33-Ala194, with an Asp187Glu substitution and a C-terminal 6-His tag
Accession #
N-terminal Sequence
Phe33
Protein/Peptide Type
Recombinant Proteins
Gene
C10orf54
Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Note
<0.10 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

Dilutions
  • Bioactivity
Theoretical MW
19 kDa.
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
30-65 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
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Reconstitution Instructions
Reconstitute at 200 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 VISTA/B7-H5/PD-1H His-tag Protein, CF

  • 4632428N05Rik
  • B7H5
  • B7-H5
  • C10orf54
  • chromosome 10 open reading frame 54
  • Dies1
  • Gi24
  • PD1H
  • PD-1H
  • platelet receptor Gi24
  • PP2135
  • SISP1
  • stress induced secreted protein 1
  • VISTA
  • VSIR

Background

Platelet receptor Gi24, also known as Dies1, VISTA, SISP1 and B7-H5, is a 55-65 kDa transmembrane glycoprotein with homology to B7-like immune costimulatory molecules (1, 2). Mature human Gi24 contains a 162 amino acid (aa) extracellular domain (ECD) with one V-type Ig-like domain, a 21 aa transmembrane segment, and a 96 aa cytoplasmic domain. Within the ECD, human Gi24 shares 70% and 67% aa sequence identity with mouse and rat Gi24, respectively (3). The 30 kDa ECD can be shed by MT1-MMP, with a 25-30 kDa fragment remaining in the membrane (3). Gi24 promotes both MT1-MMP expression and the MT1-MMP mediated activation of MMP-2 (3). Gi24 supports the differentiation of embryonic stem cells (ESC) and enhances BMP-4 induced signaling in ESC, but is also down-regulated following BMP-4 exposure (4, 5). It binds to BMP-4 directly, and also associates with the type I BMP receptor Activin RIB/ALK-4 (4, 5). Gi24 is expressed on the surface of naïve CD4+ T cells, regulatory T cells, and adipocytes (6, 7). It is up-regulated in vivo on activated monocytes and dendritic cells (5). Gi24 inhibits CD4+ and CD8+ T cell proliferation, and their production of IL-2 and IFN-gamma (6). Its expression on tumor cells attenuates the anti-tumor immune response and enables more rapid tumor progression (6). In contrast, Gi24 limits disease progression in the autoimmune disease model EAE (6). Gi24 also acts as a co-inhibitory receptor on alloreactive T cells to regulate T cell tolerance (8).
  1. Flajnik, M.F. et al. (2012) Immunogenetics 64:571.
  2. Wilcox, R.A. et al. (2012) Eur. J. Haematol. 88:465.
  3. Sakr, M.A. et al. (2010) Cancer Sci. 101:2368.
  4. Aloia, L. et al. (2010) J. Biol. Chem. 285:7776.
  5. Parisi, S. et al. (2012) FASEB J. 26:3957.
  6. Wang, L. et al. (2011) J. Exp. Med. 208:577.
  7. Ren, G. et al. (2013) PLoS One 8:e65531.
  8. Flies, D.B. et al. (2015) J. Immunol. 194:5294.

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Bioinformatics

Gene Symbol C10orf54
Uniprot