Poly-ADP-ribosyltransferase involved in various processes such as Wnt signaling pathway, telomere length and vesicle trafficking. Acts as an activator of the Wnt signaling pathway by mediating poly-ADP-ribosylation of AXIN1 and AXIN2, 2 key components of the beta-catenin destruction complex: poly-ADP-ribosylated target proteins are recognized by RNF146, which mediates their ubiquitination and subsequent degradation. Also mediates poly-ADP-ribosylation of BLZF1 and CASC3, followed by recruitment of RNF146 and subsequent ubiquitination. Mediates poly-ADP-ribosylation of TERF1, thereby contributing to the regulation of telomere length. Stimulates 26S proteasome activity.,TNKS2,ARTD6,PARP-5b,PARP-5c,PARP5B,PARP5C,TANK2,TNKL,pART6,Epigenetics & Nuclear Signaling,Signal Transduction,Cell Biology & Developmental Biology,Cell Cycle,Centrosome,Wnt/β-Catenin Signaling Pathway,TNKS2