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Direct interaction of 14-3-3ζ with ezrin promotes cell migration by regulating the formation of membrane ruffle.

Abstract：

:14-3-3 proteins have been shown to regulate the actin cytoskeleton remodeling, cell adhesion and migration. In this study, we identified ezrin, a cross-linker between plasma membrane and actin cytoskeleton, as a novel 14-3-3ζ interacting partner. The direct interaction between 14-3-3ζ and ezrin was validated in the cells and by in vitro assays. We showed that the 14-3-3ζ binding region in ezrin was located within the N-terminal and central α-helical domains and that the αG-to-αI helices of 14-3-3ζ are responsible for the binding to ezrin. Functional analyses revealed that the regulation of cell migration and membrane ruffling by 14-3-3ζ is ezrin dependent, for which the integrity of ezrin protein was required. Conversely, the knockdown of 14-3-3ζ abrogates also the stimulatory effect of ezrin on cell migration and membrane ruffling. Moreover, we found that the phosphorylation of Thr567 in ezrin facilitates the 14-3-3ζ-ezrin interaction and the formation of membrane ruffles. Taken together, these results suggest strongly that the functions of these two proteins in cell migration are linked and might be mediated by their direct physical interaction, which is important for the formation of membrane ruffles.

journal_name

J Mol Biol

journal_title

Journal of molecular biology

authors

Chen M,Liu T,Xu L,Gao X,Liu X,Wang C,He Q,Zhang G,Liu L

doi

10.1016/j.jmb.2014.06.021

subject

Has Abstract

pub_date

2014-09-09 00:00:00

pages

3118-3133

issue

18

eissn

0022-2836

issn

1089-8638

pii

S0022-2836(14)00337-4

journal_volume

426

pub_type

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