| Modification Notes |
Exportin 7 is also known as RanBP16 (ran-binding protein 16) or XPO7 and is a 1,087 amino acid protein. Exportin 7 is primarily expressed in testis, thyroid and bone marrow, but is also expressed in lung, liver and small intestine. Exportin 7 translocates proteins and large RNAs through the nuclear pore complex (NPC) and is localized to the cytoplasm and nucleus. Exportin 7 has two types of receptors, designated importins and exportins, both of which recognize proteins that contain nuclear localization signals (NLSs) and are targeted for transport either in or out of the nucleus via the NPC. Additionally, the nucleocytoplasmic RanGTP gradient regulates Exportin 7 distribution, and enables Exportin 7 to bind and release proteins and large RNAs before and after their transportation. Exportin 7 is thought to play a role in erythroid differentiation and may also interact with cancer-associated proteins, suggesting a role for Exportin 7 in tumorigenesis. |