UniProt functional annotation for Q495A1



	UniProt functional annotation for Q495A1

UniProt code: Q495A1.

Organism: Homo sapiens (Human).

Taxonomy: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.

Function: Binds with high affinity to the poliovirus receptor (PVR) which causes increased secretion of IL10 and decreased secretion of IL12B and suppresses T-cell activation by promoting the generation of mature immunoregulatory dendritic cells. {ECO:0000269|PubMed:19011627}.

Subunit: Homodimer in cis; binds with high affinity to PVR, forming a heterotetrameric assembly of two TIGIT and two PVR molecules. Binds with lower affinity to NECTIN2 and NECTIN3. {ECO:0000269|PubMed:22421438}.

Subcellular location: Cell membrane {ECO:0000269|PubMed:19011627}; Single-pass type I membrane protein {ECO:0000269|PubMed:19011627}.

Tissue specificity: Expressed at low levels on peripheral memory and regulatory CD4+ T-cells and NK cells and is up-regulated following activation of these cells (at protein level). {ECO:0000269|PubMed:19011627}.

Domain: Contains 1 copy of a cytoplasmic motif that is referred to as the immunoreceptor tyrosine-based inhibitor motif (ITIM). This motif is involved in modulation of cellular responses. The phosphorylated ITIM motif can bind the SH2 domain of several SH2-containing phosphatases.

Sequence caution: Sequence=CAI46183.1; Type=Erroneous initiation; Evidence={ECO:0000305};

Annotations taken from UniProtKB at the EBI.


Organism:		Homo sapiens (Human).
Taxonomy:		Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.



Function:		Binds with high affinity to the poliovirus receptor (PVR) which causes increased secretion of IL10 and decreased secretion of IL12B and suppresses T-cell activation by promoting the generation of mature immunoregulatory dendritic cells. {ECO:0000269\|PubMed:19011627}.


Subunit:		Homodimer in cis; binds with high affinity to PVR, forming a heterotetrameric assembly of two TIGIT and two PVR molecules. Binds with lower affinity to NECTIN2 and NECTIN3. {ECO:0000269\|PubMed:22421438}.
Subcellular location:		Cell membrane {ECO:0000269\|PubMed:19011627}; Single-pass type I membrane protein {ECO:0000269\|PubMed:19011627}.
Tissue specificity:		Expressed at low levels on peripheral memory and regulatory CD4+ T-cells and NK cells and is up-regulated following activation of these cells (at protein level). {ECO:0000269\|PubMed:19011627}.
Domain:		Contains 1 copy of a cytoplasmic motif that is referred to as the immunoreceptor tyrosine-based inhibitor motif (ITIM). This motif is involved in modulation of cellular responses. The phosphorylated ITIM motif can bind the SH2 domain of several SH2-containing phosphatases.
Sequence caution:		Sequence=CAI46183.1; Type=Erroneous initiation; Evidence={ECO:0000305};