Molecular and Structural Analysis of Central Transport Channel in Complex with Nup93 of Nuclear Pore Complex

Overview

Journal Protein Sci

Specialty Biochemistry

Date 2020 Oct 21

PMID 33085133

Citations 4

Authors

Parshuram J Sonawane

Pravin S Dewangan

Pankaj Kumar Madheshiya

Kriti Chopra

Mohit Kumar

Sangeeta Niranjan

Mohammed Yousuf Ansari

Jyotsana Singh

Shrankhla Bawaria

Manidipa Banerjee

Radha Chauhan

Affiliations

Soon will be listed here.

Abstract

The central transport channel (CTC) of nuclear pore complexes (NPCs) is made up of three nucleoporins Nup62, Nup58 and Nup54. In which manner and capacity, these nucleoporins form the CTC, is not yet clear. We explored the CTC Nups from various species and observed that distinct biochemical characteristics of CTC Nups are evolutionarily conserved. Moreover, comparative biochemical analysis of CTC complexes showed various stoichiometric combinations of Nup62, Nup54 and Nup58 coexisting together. We observed the conserved amino-terminal domain of mammalian Nup93 is crucial for the anchorage of CTC and its localization to NPCs. We could reconstitute and purify mammalian CTC·Nup93 quaternary complex by co-expressing full length or N-terminal domain of Nup93 along with CTC complex. Further, we characterized CTC·Nup93 complex using small angle X-ray scattering and electron microscopy that revealed a "V" shape of CTC·Nup93 complex. Overall, this study demonstrated for the first time evolutionarily conserved plasticity and stoichiometric diversity in CTC Nups.

Citing Articles

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Molecular and structural analysis of central transport channel in complex with Nup93 of nuclear pore complex.

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