TIGIT; also known as V-set and transmembrane domain-containing protein 3 (VSTM3) or V-set and immunoglobulin domain-containing protein 9 (VSIG9) is a new surface protein containing an immunoglobulin variable domain; a transmembrane domain and an immunoreceptor tyrosine-based inhibitory motif (ITIM). TIGIT is expressed on regulatory; memory; activated T cells and NK cells. It binds PVR with high affinity; and PVRL2 with lower affinity; but not PVRL3. Knockdown of TIGIT with siRNA in human memory T cells did not affect T cell responses; however; TIGIT inhibits NK cytotoxicity directly through its ITIM. TIGIT suppresses T cell activation by promoting the generation of mature immunoregulatory dendritic cells. The binding of PVR to TIGIT on human dendritic cells enhanced the production of IL-10 and diminished the production of IL-12p40. In addition; TIGIT counter inhibits the NK-mediated killing of tumor cells and protects normal cells from NK-mediated cytotoxicity thus providing an "alternative self" mechanism for MHC class I inhibition.Immune CheckpointImmune Checkpoint Targets Co-inhibitory Immune Checkpoint Targets Immunotherapy Cancer Immunotherapy Targeted Therapy
Product Name:
Human TIGIT Recombinant Protein (RPES2480)
Product Code:
RPES2480
Size:
20µg
Species:
Human
Expressed Host:
HEK293 Cells
Synonyms:
T-cell immunoreceptor with Ig and ITIM domains,,VSIG9, VSTM3,TIGIT,V-set and transmembrane domain-containing protein 3,V-set and immunoglobulin domain-containing protein 9
Accession:
Q495A1
Sequence:
Met 1-Phe 138
Fusion tag:
C-His
Activity:
Measured by its ability to bind with human CD155-Fc in a functional ELISA.Measured by its ability to bind with mouse PVR-Fch in a functional ELISA.
Endotoxin:
<1.0 EU per µg of the protein as determined by the LAL method.
Protein Construction:
A DNA sequence encoding the extracellular domain of human TIGIT (NP_776160.2) (Met 1-Phe 138) with a C-terminal polyhistidine tag was expressed.
Purity:
> 85 % as determined by reducing SDS-PAGE.
Mol Mass:
14.2 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.
