Transcription factor that binds to the inverted palindrome 5'-GTTAATNATTAAC-3' (PubMed:8388098). Binds to the FPC element in the cAMP regulatory unit of the PLAU gene (PubMed:8388098). Transcriptional activity is increased by coactivator PCBD1 (By similarity). Binds DNA as a dimer. Can form homodimer or heterodimer with HNF1-alpha (By similarity). Interacts (via HNF-p1 domain) with PCBD1; the interaction increases its transactivation activity (By similarity). Belongs to the HNF1 homeobox family.