The function of PATZ1 (POZ/BTB and AT hook containing zinc finger 1, Ensembl gene identifier ENSG00000100105) is as follows. Transcriptional regulator that plays a role in many biological processes such as embryogenesis, senescence, T-cell development or neurogenesis (PubMed:10713105, PubMed:25755280, PubMed:31875552). Interacts with the TP53 protein to control genes that are important in proliferation and in the DNA-damage response. Mechanistically, the interaction inhibits the DNA binding and transcriptional activity of TP53/p53 (PubMed:25755280). Part of the transcriptional network modulating regulatory T-cell development and controls the generation of the regulatory T-cell pool under homeostatic conditions (PubMed:31875552). {ECO:0000269|PubMed:10713105, ECO:0000269|PubMed:25755280, ECO:0000269|PubMed:31875552}. (Microbial infection) Plays a positive role in viral cDNA synthesis. .