Acts as a transcription activator for MET and as a key regulator of HGF-MET signaling. Promotes cell motility, proliferation and hepatocyte growth factor (HGF)-dependent scattering in vitro and tumor growth and metastasis in vivo. Interacts with FASLG. Mainly found in the cytoplasm in non-metastasizing tumors. Preferentially expressed in metastasizing tumors.