- SynonymVSIG3,IgSF11,CXADRL1,Bt-IgSF,CT119
- SourceHuman VSIG3, Fc Tag (VS3-H5258) is expressed from human 293 cells (HEK293). It contains AA Leu 23 - Gly 241 (Accession # Q5DX21-1).Predicted N-terminus: Leu 23Request for sequence
- Molecular Characterization
This protein carries a human IgG1 Fc tag at the C-terminus.
The protein has a calculated MW of 49.7 kDa. The protein migrates as 60-65 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
- EndotoxinLess than 1.0 EU per μg by the LAL method.
- Purity
>95% as determined by SDS-PAGE.
- Formulation
Lyophilized from 0.22 μm filtered solution in Tris with Glycine, Arginine and NaCl, pH7.5. Normally trehalose is added as protectant before lyophilization.
Contact us for customized product form or formulation.
- Reconstitution
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
- Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
Human VSIG3, Fc Tag on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.
Immobilized Human VSIG3, Fc Tag (Cat. No. VS3-H5258) at 5 μg/mL (100 μL/well) can bind Human B7-H5, Mouse IgG2a Fc Tag, low endotoxin (Cat. No. B75-H5258) with a linear range of 0.313-10 μg/mL (Routinely tested).
Human B7-H5, Mouse IgG2a Fc Tag, low endotoxin (Cat. No. B75-H5258) Captured on CM5 chip via anti-mouse antibodies surface can bind Human VSIG3, Fc Tag (Cat. No. VS3-H5258) with an affinity constant of 8.87 μM as determined in a SPR assay (Biacore T200) (Routinely tested).
Human VSIG3, Fc Tag (Cat. No. VS3-H5258) captured on CM5 chip via Anti-human IgG Fc antibodies surface can bind Human B7-H5, His Tag (Cat. No. B75-H52H0) with an affinity constant of 53.4 μM as determined in a SPR assay (Biacore T200) (Routinely tested).
Loaded Human VSIG3, Fc Tag (Cat. No. VS3-H5258) on AHC Biosensor, can bind Human B7-H5, Mouse IgG2a Fc Tag, low endotoxin (Cat. No. B75-H5258) with an affinity constant of 3.7 μM as determined in BLI assay (ForteBio Octet Red96e) (QC tested).
Loaded Biotinylated Human B7-H5, Avitag,His Tag (Cat. No. B75-H82E1) on SA Biosensor, can bind Human VSIG3, Fc Tag (Cat. No. VS3-H5258) with an affinity constant of 0.312 μM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Loaded Biotinylated Human B7-H5, Fc,Avitag (Cat. No. B75-H82F3) on SA Biosensor, can bind Human VSIG3, Fc Tag (Cat. No. VS3-H5258) with an affinity constant of 0.617 μM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
- BackgroundVSIG3, also known as IGSF11, BT-IgSF, and CLMP, is a homophilic adhesion molecule that preferentially expressed in the brain. The function of VSIG3 is to stimulate cell growth through homophilic interactions. In clinical, the VSIG3 has been reported to as a novel target for cancer immunotherapy of gastrointestinal and hepatocellular carcinomas. In addition, VSIG-3 is also a ligand of B7 family member VISTA/PD-1H and inhibits human T-cell functions through a novel VSIG-3/VISTA pathway. VSIG-3/VISTA co-inhibitory pathway may provide new strategies for the treatment of human cancers and autoimmune disorders.
- References
- (1)Jang S, et al. 2016. Nat Neurosci. 19(1):84-93.
- (2)Watanabe T, et al. 2005. Cancer Science. 96(8):498-506.
- (3)Wang J, et al. 2019. Immunology. 156(1):74-81.
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