Phosphorylation-independent membrane relocalization of ezrin following association with Dbl in vivo

Cristina Vanni, Alessia Parodi, Patrizia Mancini, Vincenzo Visco, Catherine Ottaviano, Maria Rosaria Torrisi, Alessandra Eva

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Ezrin, a widespread protein involved in cell migration, morphogenesis and cell adhesion, belongs to a large family of proteins known as ERM (ezrin, radixin, moesin). These three closely related proteins are thought to function as linkers between plasma membrane and actin cytoskeleton and their function is regulated by the small GTP-binding protein Rho. It has been previously shown that the active form of radixin can bind in vitro to Dbl, a Rho-specific guanine nucleotide exchange factor, although an in vivo interaction has not yet been demonstrated. In this paper, we attempted to investigate whether ezrin can also associate with Dbl. We show here that Dbl protein can effectively bind both in vitro and in vivo to the N-terminal region (amino acids 1-531) of a constitutively active mutant of ezrin and with the full-length molecule. We found that this binding is mediated by the Dbl pleckstrin homology domain, responsible for the proper subcellular localization of the Dbl protein. Moreover, we show that Dbl induces localization to the plasma membrane of both the active deletion mutant and the full-length ezrin proteins. Finally, we show that the relocalization of ezrin is independent of Dbl GEF activity. These results indicate that Dbl could induce translocation of ezrin to the plasma membrane through a mechanism that does not require ezrin C-terminus phosphorylation by Rho-associated kinases.

Original languageEnglish
Pages (from-to)4098-4106
Number of pages9
JournalOncogene
Volume23
Issue number23
DOIs
Publication statusPublished - May 20 2004

Fingerprint

Phosphorylation
Membranes
Proteins
Cell Membrane
Rho Guanine Nucleotide Exchange Factors
rho-Associated Kinases
rho GTP-Binding Proteins
ezrin
Actin Cytoskeleton
Morphogenesis
Cell Adhesion
Cell Movement
Amino Acids

Keywords

  • Dbl oncogene
  • ERM
  • PH domain

ASJC Scopus subject areas

  • Cancer Research
  • Genetics
  • Molecular Biology

Cite this

Vanni, C., Parodi, A., Mancini, P., Visco, V., Ottaviano, C., Torrisi, M. R., & Eva, A. (2004). Phosphorylation-independent membrane relocalization of ezrin following association with Dbl in vivo. Oncogene, 23(23), 4098-4106. https://doi.org/10.1038/sj.onc.1207509

Phosphorylation-independent membrane relocalization of ezrin following association with Dbl in vivo. / Vanni, Cristina; Parodi, Alessia; Mancini, Patrizia; Visco, Vincenzo; Ottaviano, Catherine; Torrisi, Maria Rosaria; Eva, Alessandra.

In: Oncogene, Vol. 23, No. 23, 20.05.2004, p. 4098-4106.

Research output: Contribution to journalArticle

Vanni, C, Parodi, A, Mancini, P, Visco, V, Ottaviano, C, Torrisi, MR & Eva, A 2004, 'Phosphorylation-independent membrane relocalization of ezrin following association with Dbl in vivo', Oncogene, vol. 23, no. 23, pp. 4098-4106. https://doi.org/10.1038/sj.onc.1207509
Vanni C, Parodi A, Mancini P, Visco V, Ottaviano C, Torrisi MR et al. Phosphorylation-independent membrane relocalization of ezrin following association with Dbl in vivo. Oncogene. 2004 May 20;23(23):4098-4106. https://doi.org/10.1038/sj.onc.1207509
Vanni, Cristina ; Parodi, Alessia ; Mancini, Patrizia ; Visco, Vincenzo ; Ottaviano, Catherine ; Torrisi, Maria Rosaria ; Eva, Alessandra. / Phosphorylation-independent membrane relocalization of ezrin following association with Dbl in vivo. In: Oncogene. 2004 ; Vol. 23, No. 23. pp. 4098-4106.
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