The function of Ensembl gene identifier ENSG00000203722 (RAET1G, retinoic acid early transcript 1G) is as follows. [Isoform 1]: Binds and activates the KLRK1/NKG2D receptor, mediating natural killer cell cytotoxicity. {ECO:0000269|PubMed:15240696, ECO:0000269|PubMed:18544572, ECO:0000269|PubMed:19658097}. [Isoform 3]: Down-regulates the expression of KLRK1 and stimulates natural killer cells to secrete IFNG. . [Isoform 2]: Stimulates natural killer cells to secrete IFNG. .