Psidin, a conserved protein that regulates protrusion dynamics and cell migration.

Abstract:

:Dynamic assembly and disassembly of actin filaments is a major driving force for cell movements. Border cells in the Drosophila ovary provide a simple and genetically tractable model to study the mechanisms regulating cell migration. To identify new genes that regulate cell movement in vivo, we screened lethal mutations on chromosome 3R for defects in border cell migration and identified two alleles of the gene psidin (psid). In vitro, purified Psid protein bound F-actin and inhibited the interaction of tropomyosin with F-actin. In vivo, psid mutations exhibited genetic interactions with the genes encoding tropomyosin and cofilin. Border cells overexpressing Psid together with GFP-actin exhibited altered protrusion/retraction dynamics. Psid knockdown in cultured S2 cells reduced, and Psid overexpression enhanced, lamellipodial dynamics. Knockdown of the human homolog of Psid reduced the speed and directionality of migration in wounded MCF10A breast epithelial monolayers, whereas overexpression of the protein increased migration speed and altered protrusion dynamics in EGF-stimulated cells. These results indicate that Psid is an actin regulatory protein that plays a conserved role in protrusion dynamics and cell migration.

journal_name

Genes Dev

journal_title

Genes & development

authors

Kim JH,Cho A,Yin H,Schafer DA,Mouneimne G,Simpson KJ,Nguyen KV,Brugge JS,Montell DJ

doi

10.1101/gad.2028611

subject

Has Abstract

pub_date

2011-04-01 00:00:00

pages

730-41

issue

7

eissn

0890-9369

issn

1549-5477

pii

gad.2028611

journal_volume

25

pub_type

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