The function of Ensembl gene identifier ENSG00000164520 (RAET1E, retinoic acid early transcript 1E) is as follows. Binds and activates the KLRK1/NKG2D receptor, mediating natural killer cell cytotoxicity. {ECO:0000269|PubMed:15240696, ECO:0000269|PubMed:18544572}.