PeproTech® Human VISTA Fc Recombinant Protein

Descrizione

Recombinant Human VISTA Fc is a 88.2 kDa homodimeric protein of 395 amino acids consisting of the extracellular domain of the mature sequence, as well as a 230-residue C-terminal Fc region linked by two glycines. As a result of glycosylation, the Recombinant Human VISTA Fc migrates to an apparent molecular weight of approximately 60-70 kDa by SDS-PAGE gel, under reducing conditions.

VISTA (V-domain Ig containing suppressor of T-cell activation), also known as B7-H5 or PD-1H, is a product of the VSIR gene. Although VISTA bears sequence homology to PD-L1 it has a different expression pattern. In both mouse and humans, VISTA is expressed predominantly on hematopoietic cells with the highest densities on myeloid cells, and lower levels on T cells. It is usually absent on B cells. VISTA expressed by antigen presenting cells has been shown to directly suppress proliferation and cytokine production of CD4 and CD8 T cells, making it a target for cancer immunotherapy. The reported ligands of VISTA include CD28H, VSIG-3 and VSIG-8.