Functions as a component of the nuclear pore complex (NPC). NPC components, collectively referred to as nucleoporins (NUPs), can play the role of both NPC structural components and of docking or interaction partners for transiently associated nuclear transport factors. Active directional transport is assured by both, a Phe-Gly (FG) repeat affinity gradient for these transport factors across the NPC and a transport cofactor concentration gradient across the nuclear envelope. Component of the npc107-120 complex which consists of nup85, nup107, nup120, nup131, nup132 and seh1. Interacts with nup107. Nuclear rim. Belongs to the nucleoporin Nup133 family.