This is a family of eukaryotic nucleoporins of several different sizes. All of them are long and form the scaffold of the nuclear pore complex. Nup192 in particular modulates the permeability of the central channel of the NPC central or nuclear pore complex [1].

1: Structure, dynamics, evolution, and function of a major scaffold component in the nuclear pore complex. Sampathkumar P, Kim SJ, Upla P, Rice WJ, Phillips J, Timney BL, Pieper U, Bonanno JB, Fernandez-Martinez J, Hakhverdyan Z, Ketaren NE, Matsui T, Weiss TM, Stokes DL, Sauder JM, Burley SK, Sali A, Rout MP, Almo SC; Structure. 2013;21:560-571. PMID:23499021