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  Nup98 FG domains from diverse species spontaneously phase-separate into particles with nuclear pore-like permselectivity.

Schmidt, H. B., & Görlich, D. (2015). Nup98 FG domains from diverse species spontaneously phase-separate into particles with nuclear pore-like permselectivity. eLife, 4: e04251. doi:10.7554/eLife.04251.

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2087973_Suppl.pdf (Supplementary material), 18MB
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Schmidt, H. B.1, Author           
Görlich, D.1, Author           
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1Department of Cellular Logistics, MPI for biophysical chemistry, Max Planck Society, ou_578574              

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 Abstract: Nuclear pore complexes (NPCs) conduct massive transport mediated by shuttling nuclear transport receptors (NTRs), while keeping nuclear and cytoplasmic contents separated. The NPC barrier in Xenopus relies primarily on the intrinsically disordered FG domain of Nup98. We now observed that Nup98 FG domains of mammals, lancelets, insects, nematodes, fungi, plants, amoebas, ciliates, and excavates spontaneously and rapidly phase-separate from dilute (submicromolar) aqueous solutions into characteristic 'FG particles'. This required neither sophisticated experimental conditions nor auxiliary eukaryotic factors. Instead, it occurred already during FG domain expression in bacteria. All Nup98 FG phases rejected inert macromolecules and yet allowed far larger NTR cargo complexes to rapidly enter. They even recapitulated the observations that large cargo-domains counteract NPC passage of NTR.cargo complexes, while cargo shielding and increased NTR.cargo surface-ratios override this inhibition. Their exquisite NPC-typical sorting selectivity and strong intrinsic assembly propensity suggest that Nup98 FG phases can form in authentic NPCs and indeed account for the permeability properties of the pore.

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Language(s): eng - English
 Dates: 2015-01-06
 Publication Status: Published online
 Pages: 30
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 Rev. Type: Peer
 Identifiers: DOI: 10.7554/eLife.04251
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Title: eLife
Source Genre: Journal
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Pages: - Volume / Issue: 4 Sequence Number: e04251 Start / End Page: - Identifier: -