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VSIG-3:VISTA [Biotinylated] Inhibitor Screening Assay Kit

The VSIG-3:VISTA [Biotinylated] Inhibitor Screening Assay Kit is a chemiluminescent ELISA designed to measure the binding between VSIG-3 (V-set and Ig domain-containing protein 3) and VISTA (V-domain immunoglobulin suppressor of T-cell activation, also known as B7-H5) protein for screening and profiling applications. This kit comes with enough purified VSIG-3 (amino acids 22-244) and biotinylated VISTA (amino acids 33-194), streptavidin-HRP, assay buffer, and detection reagent for 100 enzyme reactions.Figure 1. VSIG-3:VISTA [Biotinylated] Inhibitor ScreeningAssay Kit schematic.A 96-well plate is coated with VSIG-3protein. After coating and blocking, biotinylated VISTAis added in an optimized assay buffer. Next, unbound biotinylated VISTA is washed away, and the plate is incubated with streptavidin-HRP. After a final wash, ELISA ECL substrate is added to produce chemiluminescence that can be measured using a chemiluminescence reader. The chemiluminescence signal is proportional to the efficacy of VISTA binding to VSIG-3.Need us to run inhibitor screens or profile your compounds against VSIG-3:VISTA [Biotinylated]? Check out ourImmunotherapy Biochemical Screening Services.

Product Specifications

Background

V-domain Ig Suppressor of T cell activation (VISTA, or B7-H5) is a type I transmembrane protein that functions as an immune checkpoint. V-Set and Immunoglobulin domain containing 3 (VSIG-3, or IGSF11) is a ligand for VISTA which, when bound on activated T cells, inhibits their proliferation and the production of cytokines and chemokines. VSIG-3 expression is elevated in many cancers, especially glioma and melanoma, so the blockade of the VSIG-3/VISTA pathway represents a promising potential cancer immunotherapy strategy.

UniProt

VSIG-3: Q5DX21; VISTA: Q9H7M9

Applications

Study and screen compounds that inhibit the binding of VSIG-3 to VISTA for drug discovery in high throughput screening (HTS) applications.

Format

Catalog #ComponentAmountStorage79491VSIG-3, Fc-fusion (IgG1), Avi-Tag*20 µg-80°CAvoidfreeze/thaw cycles71327B7-H5 Fc fusion, Avi-Tag, Biotin-labeled (VISTA-biotin) 60 µg-80°C793113x Immuno Buffer 150 ml-20°C79728Blocking Buffer50 ml+4°C79742Streptavidin-HRP10 µl+4°C79670ELISA ECL Substrate A6 mlRoom TempELISA ECL Substrate B6 mlRoom Temp79699White 96-well microplate1Room Temp*The concentration of the protein is lot-specific and will be indicated on the tube.

Shipping Conditions

-80°C

Storage Conditions

Up to 6 months from date of receipt, when stored as recommended.

Contraindications

This assay kit is compatible with up to 1% final DMSO concentration.

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