Mol Biol Cell 23:740-749
Nuclear pore complexes (NPCs) are large macromolecular assemblies that control all transport across the nuclear envelope. They are formed by about 30 nucleoporins that can be roughly categorized into those forming the structural skeleton of the pore and those creating the central channel and thus providing the transport and gating properties of the NPC. Here we show that the conserved nucleoporin Nup93 is essential for NPC assembly and connects both portions of the NPC. While the C-terminal domain of the protein is necessary and sufficient for the assembly of a minimal structural backbone, full length Nup93 is required forthe additional recruitment of the Nup62 complex and the establishment of transport competent NPCs.