Domain-specific function of ShcC docking protein in neuroblastoma cells

Izumi Miyake, Yuko Hakomori, Yoko Misu, Hisaya Nakadate, Nobuo Matsuura, Michiie Sakamoto, Ryuichi Sakai

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

ShcC is a family member of the Shc docking proteins that possess two different phosphotyrosine-binding motifs and conduct signals as Grb2-binding substrates of various receptor tyrosine kinases. We have recently shown that some neuroblastoma cell lines, such as NB-39-nu cells, express a protein complex of hyperphosphorylated ShcC and anaplastic lymphoma kinase (ALK), which is self-activated by gene amplification. Here, we demonstrate that the expression of a mutant ShcC lacking Grb2-binding sites, 3YF-ShcC, significantly impaired the survival, differentiation and motility of NB-39-nu cells by blocking the ERK and Akt pathways. On the other hand, cells overexpressing ShcC or 3YF-ShcC, but not a mutant ShcC that lacks SH2, showed decreased anchorage independency and in vivo tumorigenicity, suggesting a novel ShcC-specific suppressive effect through its SH2 domain on cell transformation. Notably, overexpression of ShcC suppressed the sustained phosphorylation of Src family kinase after cell detachment, which might be independent of phosphorylation of Grb2-binding site. It was indicated that the Src/Fyn-Cas pathway is modulated as a target of these suppressive effects by ShcC. Reciprocal change of ShcC expression and phosphorylation observed in malignant neuroblastoma cell lines might be explained by these phosphotyrosine-dependent and -independent functions of ShcC.

Original languageEnglish
Pages (from-to)3206-3215
Number of pages10
JournalOncogene
Volume24
Issue number19
DOIs
Publication statusPublished - 2005 Apr 28

Keywords

  • Dominant-negative form
  • Neuroblastoma
  • SH2 domain
  • ShcC
  • Src family kinase

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Cancer Research

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