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Reference: Schrader N, et al. (2008) Structural basis of the nic96 subcomplex organization in the nuclear pore channel. Mol Cell 29(1):46-55

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Abstract

Nic96 is a conserved nucleoporin that recruits the Nsp1-Nup49-Nup57 complex, a module with Phe-Gly (FG) repeats, to the central transport channel of the nuclear pore complex (NPC). Nic96 binds the Nsp1 complex via its N domain and assembles into the NPC framework via its central and C domain. Here, we report the crystal structure of a large structural nucleoporin, Nic96 without its N domain (Nic96DeltaN). Nic96DeltaN is composed of three domains and is a straight molecule that--although almost entirely helical--exhibits strong deviations from the predicted alpha-solenoid fold. The missing N domain projects midway from the Nic96 molecule, indicating how the Nsp1 complex might be located with respect to the rod-like Nic96. Notably, Nic96DeltaN binds in vitro to FG repeats of the Nsp1 complex. These data suggest a model of how Nic96 could organize a transport module with coiled-coil domains and FG repeats in the central pore channel.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't
Authors
Schrader N, Stelter P, Flemming D, Kunze R, Hurt E, Vetter IR
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