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.
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Protein Aliases: Death Domain1alpha; PD-H1; PDCD1 homolog; Platelet receptor Gi24; Sisp-1; Stress-induced secreted protein-1; V-domain Ig suppressor of T cell activation; V-set domain-containing immunoregulatory receptor; V-set immunoregulatory receptor; V-type immunoglobulin domain-containing suppressor of T-cell activation
Gene Aliases: B7-H5; B7H5; C10orf54; DD1alpha; GI24; PD-1H; PP2135; SISP1; UNQ730/PRO1412; VISTA; VSIR
UniProt ID: (Human) Q9H7M9
Entrez Gene ID: (Human) 64115
Molecular Function: immunoglobulin receptor superfamily