Transcription factor that binds to the inverted palindrome 5'-GTTAATNATTAAC-3' (PubMed:17924661, PubMed:7900999). Binds to the FPC element in the cAMP regulatory unit of the PLAU gene (By similarity). Transcriptional activity is increased by coactivator PCBD1 (PubMed:24204001). {ECO:0000250|UniProtKB:Q03365, ECO:0000269|PubMed:17924661, ECO:0000269|PubMed:24204001, ECO:0000269|PubMed:7900999}. This is the function of HNF1B (HNF1 homeobox B, ENSG00000275410).