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. It is specifically important for nuclear mRNA export. {ECO:0000269|PubMed:10801828; ECO:0000269|PubMed:11689687; ECO:0000269|PubMed:8970155; ECO:0000269|PubMed:9463388}.