Transcriptional regulator which directly modulates PDPK1 expression, thus promoting survival of pancreatic beta-cells. Also regulates expression of NDFIP1, BNIP3, and CCNG1. Expressed at high levels in the brain. Significant expression also observed in the heart, spleen and lung. Expressed in pancreatic islets (beta-cells and non-beta-cells) (PubMed:21059917). Not expressed until 11 days in embryonic development. Belongs to the TALE/MEIS homeobox family.