The tumor suppressor WT1 represses and activates transcription. The protein encoded by this gene is a WT1-interacting protein that itself functions as a transcriptional repressor. It contains a putative leucine zipper domain which interacts with the zinc finger DNA binding domain of WT1. This protein is specifically upregulated during apoptosis of prostate cells. [provided by RefSeq, Jul 2008],PAR4, Par-4,Apoptosis,Cell Biology & Developmental Biology,Cell Cycle,Endocrine & Metabolism,Epigenetics & Nuclear Signaling,PAWR