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- W2529120786 abstract "Passive macromolecular diffusion through nuclear pore complexes (NPCs) is thought to decrease dramatically beyond a 30–60-kD size threshold. Using thousands of independent time-resolved fluorescence microscopy measurements in vivo, we show that the NPC lacks such a firm size threshold; instead, it forms a soft barrier to passive diffusion that intensifies gradually with increasing molecular mass in both the wild-type and mutant strains with various subsets of phenylalanine-glycine (FG) domains and different levels of baseline passive permeability. Brownian dynamics simulations replicate these findings and indicate that the soft barrier results from the highly dynamic FG repeat domains and the diffusing macromolecules mutually constraining and competing for available volume in the interior of the NPC, setting up entropic repulsion forces. We found that FG domains with exceptionally high net charge and low hydropathy near the cytoplasmic end of the central channel contribute more strongly to obstruction of passive diffusion than to facilitated transport, revealing a compartmentalized functional arrangement within the NPC." @default.
- W2529120786 created "2016-10-14" @default.
- W2529120786 creator A5007097283 @default.
- W2529120786 creator A5017446481 @default.
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- W2529120786 creator A5070427364 @default.
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- W2529120786 creator A5091107302 @default.
- W2529120786 date "2016-10-03" @default.
- W2529120786 modified "2023-10-18" @default.
- W2529120786 title "Simple rules for passive diffusion through the nuclear pore complex" @default.
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