Abstract
The nuclear pore complexes (NPCs) are evolutionarily conserved assemblies that allow traffic between the cytoplasm and the nucleus. In this study, we have identified and characterized a novel human nuclear pore protein, hNup133, through its homology with the Saccharomyces cerevisiae nucleoporin scNup133. Two-hybrid screens and immunoprecipitation experiments revealed a direct and evolutionarily conserved interaction between Nup133 and Nup84/Nup107 and indicated that hNup133 and hNup107 are part of a NPC subcomplex that contains two other nucleoporins (the previously characterized hNup96 and a novel nucleoporin designated as hNup120) homologous to constituents of the scNup84 subcomplex. We further demonstrate that hNup133 and hNup107 are localized on both sides of the NPC to which they are stably associated at interphase, remain associated as part of a NPC subcomplex during mitosis, and are targeted at early stages to the reforming nuclear envelope. Throughout mitosis, a fraction of hNup133 and hNup107 localizes to the kinetochores, thus revealing an unexpected connection between structural NPCs constituents and kinetochores. Photobleaching experiments further showed that the mitotic cytoplasm contains kinetochore-binding competent hNup133 molecules and that in contrast to its stable association with the NPCs the interaction of this nucleoporin with kinetochores is dynamic.
Bibliography
Belgareh, N., Rabut, G., BaiÌ, S. W., van Overbeek, M., Beaudouin, J., Daigle, N., Zatsepina, O. V., Pasteau, F., Labas, V., Fromont-Racine, M., Ellenberg, J., & Doye, V. (2001). An evolutionarily conserved NPC subcomplex, which redistributes in part to kinetochores in mammalian cells. The Journal of Cell Biology, 154(6), 1147â1160.
Authors
12
- Naïma Belgareh (first)
- Gwénaël Rabut (additional)
- Siau Wei Baï (additional)
- Megan van Overbeek (additional)
- Joël Beaudouin (additional)
- Nathalie Daigle (additional)
- Olga V. Zatsepina (additional)
- Fabien Pasteau (additional)
- Valérie Labas (additional)
- Micheline Fromont-Racine (additional)
- Jan Ellenberg (additional)
- Valérie Doye (additional)
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 12:46 p.m.) |
Deposited | 2 years, 1 month ago (July 22, 2023, 7:56 a.m.) |
Indexed | 1 month, 3 weeks ago (July 12, 2025, 6:49 p.m.) |
Issued | 23 years, 11 months ago (Sept. 17, 2001) |
Published | 23 years, 11 months ago (Sept. 17, 2001) |
Published Online | 23 years, 11 months ago (Sept. 17, 2001) |
Published Print | 23 years, 11 months ago (Sept. 17, 2001) |
@article{Belgareh_2001, title={An evolutionarily conserved NPC subcomplex, which redistributes in part to kinetochores in mammalian cells}, volume={154}, ISSN={0021-9525}, url={http://dx.doi.org/10.1083/jcb.200101081}, DOI={10.1083/jcb.200101081}, number={6}, journal={The Journal of Cell Biology}, publisher={Rockefeller University Press}, author={Belgareh, Naïma and Rabut, Gwénaël and Baï, Siau Wei and van Overbeek, Megan and Beaudouin, Joël and Daigle, Nathalie and Zatsepina, Olga V. and Pasteau, Fabien and Labas, Valérie and Fromont-Racine, Micheline and Ellenberg, Jan and Doye, Valérie}, year={2001}, month=sep, pages={1147–1160} }