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On the asymmetric partitioning of nucleocytoplasmic transport - recent insights and open questions

Kalita, Joanna and Kapinos, Larisa E. and Lim, Roderick Y. H.. (2021) On the asymmetric partitioning of nucleocytoplasmic transport - recent insights and open questions. Journal of cell science, 134 (7). jcs240382.

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Official URL: https://edoc.unibas.ch/82762/

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Abstract

Macromolecular cargoes are asymmetrically partitioned in the nucleus or cytoplasm by nucleocytoplasmic transport (NCT). At the center of this activity lies the nuclear pore complex (NPC), through which soluble factors circulate to orchestrate NCT. These include cargo-carrying importin and exportin receptors from the β-karyopherin (Kapβ) family and the small GTPase Ran, which switches between guanosine triphosphate (GTP)- and guanosine diphosphate (GDP)-bound forms to regulate cargo delivery and compartmentalization. Ongoing efforts have shed considerable light on how these soluble factors traverse the NPC permeability barrier to sustain NCT. However, this does not explain how importins and exportins are partitioned in the cytoplasm and nucleus, respectively, nor how a steep RanGTP-RanGDP gradient is maintained across the nuclear envelope. In this Review, we peel away the multiple layers of control that regulate NCT and juxtapose unresolved features against known aspects ofNPC function. Finally, we discuss how NPCs might function synergistically with Kapβs, cargoes and Ran to establish the asymmetry of NCT.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Structural Biology & Biophysics > Nanobiology Argovia (Lim)
UniBasel Contributors:Lim, Roderick Y.H.
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Company of Biologists
ISSN:0021-9533
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:31 Aug 2021 13:13
Deposited On:31 Aug 2021 13:13

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