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Structure and Assembly of the Nup84p Complex

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Siniossoglou, Symeon, Lutzmann, Malik, Santos-Rosa, Helena, Leonard, Kevin, Mueller, Shirley, Aebi, Ueli, Hurt, Ed·2000·The Journal of Cell Biology

Abstract

The Nup84p complex consists of five nucleoporins (Nup84p, Nup85p, Nup120p, Nup145p-C, and Seh1p) and Sec13p, a bona fide subunit of the COPII coat complex. We show that a pool of green fluorescent protein–tagged Sec13p localizes to the nuclear pores in vivo, and identify sec13 mutant alleles that are synthetically lethal with nup85Δ and affect the localization of a green fluorescent protein–Nup49p reporter protein. In the electron microscope, sec13 mutants exhibit structural defects in nuclear pore complex (NPC) and nuclear envelope organization. For the assembly of the complex, Nup85p, Nup120p, and Nup145p-C are essential. A highly purified Nup84p complex was isolated from yeast under native conditions and its molecular mass was determined to be 375 kD by quantitative scanning transmission electron microscopy and analytical ultracentrifugation, consistent with a monomeric complex. Furthermore, the Nup84p complex exhibits a Y-shaped, triskelion-like morphology 25 nm in diameter in the transmission electron microscope. Thus, the Nup84p complex constitutes a paradigm of an NPC structural module with distinct composition, structure, and a role in nuclear mRNA export and NPC bio- genesis.

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Metadata

Authors
Siniossoglou, S., Lutzmann, M., Santos-Rosa, H., Leonard, K., Mueller, S., Aebi, U., & Hurt, E.
Venue
The Journal of Cell Biology
Published
2000-04-03
Volume
149
Issue
1
Pages
41-54
ISSN
  • 0021-9525 (ISSN-L)
  • 1540-8140
OpenAlex
W2140235777
Cited by
168
References
0
FWCI
3.94
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Structure and Assembly of the Nup84p Complex. https://app.cochat.ai/papers/10.1083/jcb.149.1.41
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Siniossoglou, S., Lutzmann, M., Santos-Rosa, H., Leonard, K., Mueller, S., Aebi, U., & Hurt, E. (2000). Structure and Assembly of the Nup84p Complex. The Journal of Cell Biology. https://doi.org/10.1083/jcb.149.1.41

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