Nup188 is one of the many peptides that make up the nucleoporin complex (NPC), and is found across eukaryotes [1,2]. The Nup188 subcomplex (Nic96p-Nup188p-Nup192p-Pom152p) is one of at least six that make up the NPC, and as such is symmetrically loca ...
Nup188 is one of the many peptides that make up the nucleoporin complex (NPC), and is found across eukaryotes [1,2]. The Nup188 subcomplex (Nic96p-Nup188p-Nup192p-Pom152p) is one of at least six that make up the NPC, and as such is symmetrically localised on both faces of the NPC at the nuclear end, being integrally bound to the C terminus of Pom34p [3]. This protein folds into an extended stack of helices where the N-terminal forms a closed ring (subdivided into subdomains I-III in [2]) and the C-terminal forms a more regular, superhelical structure [2]. This entry represents a beta-stranded SH3-like domain inserted in subdomain III from Nup188 N-terminal region, which is a circular permutation from canonical SH3 domain [2].
The mammalian nuclear pore complex (NPC) conducts nucleocytoplasmic transport and contains multiple copies of nucleoporins (nups). This is the C-terminal interacting domain found on Nup54. Nup45 is a splice variant of Nup58 with an identical alpha-he ...
The mammalian nuclear pore complex (NPC) conducts nucleocytoplasmic transport and contains multiple copies of nucleoporins (nups). This is the C-terminal interacting domain found on Nup54. Nup45 is a splice variant of Nup58 with an identical alpha-helical region. Nup54 along with Nup62 and Nup58 are essential for nuclear transport. The C-terminal part of the alpha-helical region of Nup54 interacts with a C-terminal part of the alpha-helical region of Nup58. Interestingly, this region appears in two distinct conformations: a single helix and a helix-loop-helix, termed 'straight' and 'bent'. Whereas the straight conformer consists of a 34 residues long alpha helix (residues 460-493), the bent conformer is composed of two alpha helices, each 13 residues long, connected by a central loop (N helix, residues 460-472; C helix, residues 477-489) [1].
