Acts as an adapter for the XPO1/CRM1-mediated export of the 60S ribosomal subunit. Unlikely to play a significant role in nonsense-mediated mRNA decay (NMD). Associates with the 60S ribosomal subunit. Shuttles between the nucleus and the cytoplasm in a XPO1/CRM1-dependent manner. Present with 11900 molecules/cell in log phase SD medium. Belongs to the NMD3 family.