Cited by 196Nuclear Structure and FunctionAdvanced Electron Microscopy Techniques and ApplicationsProtein Structure and Dynamics

The Human Nuclear Pore Complex as Revealed by Cryo-Electron Tomography

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Maimon, Tal, Elad, Nadav, Dahan, Idit, Medalia, Ohad·2012·Structure

Abstract

Nuclear pore complexes (NPCs) are the sole passage through the nuclear envelope, connecting the cytoplasm to the nucleoplasm. These gigantic molecular machines, over 100 MDa in molecular weight, allow free diffusion of small molecules and ions while mediating selective energy-dependent nucleocytoplasmic transport of large macromolecules. Here, we applied cryo-electron tomography to human fibroblast cells, reconstructing their nuclear envelopes without applying any purification steps. From these reconstructions, we extracted subtomograms containing individual NPCs and utilized in silico subtomogram averaging procedures to determine the structure of the mammalian pore complex at a resolution of ∼6.6 nm. Beyond revealing the canonical features of the human NPC, our analysis identified inner lateral channels and fusing bridge-like structures, suggesting alternative routes of peripheral nuclear passage. Finally, we concluded from our structural analysis that the human NPC is structurally distinct from that of lower eukaryotes in terms of dimension and organization but resembles its amphibian (frog) counterpart.

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Crossref · 10.1016/j.str.2012.03.025

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Authors
Maimon, T., Elad, N., Dahan, I., & Medalia, O.
Affiliations
Ben-Gurion University of the Negev (IL)
Corresponding author
Medalia, Ohad
Venue
Structure
Publisher
Elsevier BV
Published
2012-06
Volume
20
Issue
6
Pages
998-1006
ISSN
0969-2126 (ISSN-L)
OpenAlex
W2036469447
Cited by
196
References
53
Citations by year
2026: 10 · 2025: 6 · 2024: 4 · 2023: 7 · 2022: 15 · 2021: 14 · 2020: 12 · 2019: 18 · 2018: 16 · 2017: 14 · 2016: 18 · 2015: 19 · 2014: 20 · 2013: 19 · 2012: 4
FWCI
7.96
Type
journal article
Language
en
Open access
Locations
  • Structure (publishedVersion)
  • PubMed (publishedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (acceptedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion)
  • Zurich Open Repository and Archive (University of Zurich)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nuclear Structure and Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Structural Biology › Advanced Electron Microscopy Techniques and Applications
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
Keywords
nuclear pore complex, nuclear envelope, nuclear transport, subtomogram averaging, human fibroblasts
MeSH terms
Cell Line, Cell Nucleus, Humans, Models, Molecular, Particle Size, Surface Properties, Cryoelectron Microscopy, Protein Structure, Quaternary, Nuclear Pore, Structural Homology, Protein, Electron Microscope Tomography

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