TGIF1: Proteins and Enzymes

Novel homeobox gene, denoted TGIF (interacting factor), belongs to an expanding TALE (three amino acid loop extension) superclass of atypical homeodomains. The TGIF homeodomain binds to a previously characterized retinoid X receptor (RXR) responsive element from the cellular retinol-binding protein II promoter (CRBPII-RXRE), which contains an unusual DNA target for a homeobox (1). In vitro studies have implicated TGIF as a transcriptional repressor and corepressor in retinoid and TGF-beta ...