WW domain-containing transcription regulator protein 1 also known as WWTR1 and TAZ, is a 44KDa protein that acts as a downstream regulatory target in the Hippo signaling pathway. This protein undergoes post-translational modification and becomes phosphorylated by LATS2 and STK3/MST2. TAZ in its phosphorylated state is functionally inactive and is retained in the cytoplasm. When TAZ is not phosphorylated it can be retained in the nucleus by a protein called MED15.
