這個基因編碼一個巨大的卷曲螺旋蛋白，形成附著在核孔復合體（npc）內表面的核內絲。這種蛋白質直接與鼻咽癌的幾種成分相互作用它是mrnas和一些蛋白質的核輸出所必需的。在某些腫瘤中，該基因的5'端與幾種不同的激酶基因發生致癌融合。
This gene encodes a large coiled-coil protein that forms intranuclear filaments attached to the inner surface of nuclear pore complexes (NPCs). The protein directly interacts with several components of the NPC. It is required for the nuclear export of mRNAs and some proteins. Oncogenic fusions of the 5' end of this gene with several different kinase genes occur in some neoplasias.