Regulation of EGF receptor signaling by the MARVEL domain-containing protein CKLFSF8

Caining Jin, Peiguo Ding, Ying Wang, Dalong Ma

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

It is known that chemokine-like factor superfamily 8 (CKLFSF8), a member of the CKLF superfamily, has four putative transmembrane regions and a MARVEL domain. Its structure is similar to TM4SF11 (plasmolipin) and widely distributed in normal tissue. However, its function is not yet known. We show here that CKLFSF8 is associated with the epidermal growth factor receptor (EGFR) and that ectopic expression of CKLFSF8 in several cell lines suppresses EGF-induced cell proliferation, whereas knockdown of CKLFSF8 by siRNA promotes cell proliferation. In cells overexpressing CKLFSF8, the initial activation of EGFR was not affected, but subsequent desensitization of EGF-induced signaling occurred rapidly. This attenuation was correlated with an increased rate of receptor endocytosis. In contrast, knockdown of CKLFSF8 by siCKLFSF8 delayed EGFR endocytosis. These results identify CKLFSF8 as a novel regulator of EGF-induced signaling and indicate that the association of EGFR with four transmembrane proteins is critical for EGFR desensitization.

Original languageEnglish (US)
Pages (from-to)6375-6382
Number of pages8
JournalFEBS Letters
Volume579
Issue number28
DOIs
Publication statusPublished - Nov 21 2005

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Keywords

  • CKLFSF8
  • EGFR
  • Signal internalization

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Molecular Biology

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