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A quantitative map of nuclear pore assembly reveals two distinct mechanisms
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Journal Article
A quantitative map of nuclear pore assembly reveals two distinct mechanisms
2023
Overview
Understanding how the nuclear pore complex (NPC) is assembled is of fundamental importance to grasp the mechanisms behind its essential function and understand its role during the evolution of eukaryotes
1
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4
. There are at least two NPC assembly pathways—one during the exit from mitosis and one during nuclear growth in interphase—but we currently lack a quantitative map of these events. Here we use fluorescence correlation spectroscopy calibrated live imaging of endogenously fluorescently tagged nucleoporins to map the changes in the composition and stoichiometry of seven major modules of the human NPC during its assembly in single dividing cells. This systematic quantitative map reveals that the two assembly pathways have distinct molecular mechanisms, in which the order of addition of two large structural components, the central ring complex and nuclear filaments are inverted. The dynamic stoichiometry data was integrated to create a spatiotemporal model of the NPC assembly pathway and predict the structures of postmitotic NPC assembly intermediates.
Single-molecule calibrated live microscopy and computational modelling have revealed that human nuclear pore complex assembly takes different pathways during the exit from mitosis and during nuclear growth in interphase.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
