Axis inhibition protein2 (AXIN2), also known as Coductin or Axil, is a multidomain scaffold protein that negatively regulate Wnt signaling. AXIN2 can directly interact with beta-catenin and GSK3B. AXIN2 has a number of phosphorylation sites, and also can undergo poly(ADP-ribosy)lation by tankyrase TNKS and TNKS2. Poly(ADP-ribosy)lated AXIN2 then get unbiquitinated by RNF146 and leads to its degradation and subsequent activation of Wnt signaling.
