Linear Arrays of Nuclear Envelope Proteins Harness Retrograde Actin Flow for Nuclear Movement

Overview

Journal Science

Specialty Science

Date 2010 Aug 21

PMID 20724637

Citations 264

Authors

G W Gant Luxton

Edgar R Gomes

Eric S Folker

Erin Vintinner

Gregg G Gundersen

Affiliations

Soon will be listed here.

Abstract

Nuclei move to specific locations to polarize migrating and differentiating cells. Many nuclear movements are microtubule-dependent. However, nuclear movement to reorient the centrosome in migrating fibroblasts occurs through an unknown actin-dependent mechanism. We found that linear arrays of outer (nesprin2G) and inner (SUN2) nuclear membrane proteins assembled on and moved with retrogradely moving dorsal actin cables during nuclear movement in polarizing fibroblasts. Inhibition of nesprin2G, SUN2, or actin prevented nuclear movement and centrosome reorientation. The coupling of actin cables to the nuclear membrane for nuclear movement via specific membrane proteins indicates that, like plasma membrane integrins, nuclear membrane proteins assemble into actin-dependent arrays for force transduction.

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