Control of Epithelial Cell Migration and Invasion by the IKKbeta- and CK1alpha-Mediated Degradation of RAPGEF2

TY - JOUR

T1 - Control of Epithelial Cell Migration and Invasion by the IKKbeta- and CK1alpha-Mediated Degradation of RAPGEF2

AU - Magliozzi, R.

AU - Low, T.Y.

AU - Weijts, B.G.

AU - Cheng, T.

AU - Spanjaard, E.

AU - Mohammed, S.

AU - Veen, A.

AU - Ovaa, H.

AU - de Rooij, J.

AU - Zwartkruis, F.J.

AU - Bos, J.L.

AU - de Bruin, A.

AU - Heck, A.J.R.

AU - Guardavaccaro, D.

N1 - Reporting year: 2013

PY - 2013

Y1 - 2013

N2 - Epithelial cell migration is crucial for the development and regeneration of epithelial tissues. Aberrant regulation of epithelial cell migration has a major role in pathological processes such as the development of cancer metastasis and tissue fibrosis. Here, we report that in response to factors that promote cell motility, the Rap guanine exchange factor RAPGEF2 is rapidly phosphorylated by I-kappa-B-kinase-beta and casein kinase-1alpha and consequently degraded by the proteasome via the SCF(betaTrCP) ubiquitin ligase. Failure to degrade RAPGEF2 in epithelial cells results in sustained activity of Rap1 and inhibition of cell migration induced by HGF, a potent metastatic factor. Furthermore, expression of a degradation-resistant RAPGEF2 mutant greatly suppresses dissemination and metastasis of human breast cancer cells. These findings reveal a molecular mechanism regulating migration and invasion of epithelial cells and establish a key direct link between IKKbeta and cell motility controlled by Rap-integrin signaling.

AB - Epithelial cell migration is crucial for the development and regeneration of epithelial tissues. Aberrant regulation of epithelial cell migration has a major role in pathological processes such as the development of cancer metastasis and tissue fibrosis. Here, we report that in response to factors that promote cell motility, the Rap guanine exchange factor RAPGEF2 is rapidly phosphorylated by I-kappa-B-kinase-beta and casein kinase-1alpha and consequently degraded by the proteasome via the SCF(betaTrCP) ubiquitin ligase. Failure to degrade RAPGEF2 in epithelial cells results in sustained activity of Rap1 and inhibition of cell migration induced by HGF, a potent metastatic factor. Furthermore, expression of a degradation-resistant RAPGEF2 mutant greatly suppresses dissemination and metastasis of human breast cancer cells. These findings reveal a molecular mechanism regulating migration and invasion of epithelial cells and establish a key direct link between IKKbeta and cell motility controlled by Rap-integrin signaling.

U2 - 10.1016/j.devcel.2013.10.023

DO - 10.1016/j.devcel.2013.10.023

M3 - Article

SN - 1534-5807

VL - 27

SP - 574

EP - 585

JO - Developmental Cell

JF - Developmental Cell

IS - 5

ER -