该基因编码核外激素受体复合物的β亚单位，该复合物与核定位信号相互作用，将核蛋白靶向细胞核。核外激素受体复合物是一个识别核定位信号的α亚单位和一个β亚单位的异二聚体，β亚单位将复合物固定在核孔蛋白上。这个基因的交替剪接导致编码不同蛋白质的几种转录变体[由RefSeq提供，2018年6月]
This gene encodes the beta subunit of the karyopherin receptor complex which interacts with nuclear localization signals to target nuclear proteins to the nucleus. The karyopherin receptor complex is a heterodimer of an alpha subunit which recognizes the nuclear localization signal and a beta subunit which docks the complex at nucleoporins. Alternate splicing of this gene results in several transcript variants encoding different proteins. [provided by RefSeq, Jun 2018]