Tumor suppressor cell adhesion molecule 1 (CADM1) is cleaved by a disintegrin and metalloprotease 10 (ADAM10) and subsequently cleaved by γ-secretase complex

Yusuke Nagara, Man Hagiyama, Naoya Hatano, Eugene Futai, Satoshi Suo, Yutaka Takaoka, Yoshinori Murakami, Akihiko Ito, Shoichi Ishiura

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Cell adhesion molecule 1 (CADM1) is a type I transmembrane glycoprotein expressed in various tissues. CADM1 is a cell adhesion molecule with many functions, including roles in tumor suppression, apoptosis, mast cell survival, synapse formation, and spermatogenesis. CADM1 undergoes membrane-proximal cleavage called shedding, but the sheddase and mechanisms of CADM1 proteolysis have not been reported. We determined the cleavage site involved in CADM1 shedding by LC/MS/MS and showed that CADM1 shedding occurred in the membrane fraction and was inhibited by tumor necrosis factor-α protease inhibitor-1 (TAPI-1). An siRNA experiment revealed that ADAM10 mediates endogenous CADM1 shedding. In addition, the membrane-bound fragment generated by shedding was further cleaved by γ-secretase and generated CADM1-intracellular domain (ICD) in a mechanism called regulated intramembrane proteolysis (RIP). These results clarify the detailed mechanism of membrane-proximal cleavage of CADM1, suggesting the possibility of RIP-mediated CADM1 signaling.

Original languageEnglish
Pages (from-to)462-467
Number of pages6
JournalBiochemical and biophysical research communications
Volume417
Issue number1
DOIs
Publication statusPublished - 2012 Jan 6

Keywords

  • ADAM10
  • CADM1
  • RIP
  • Shedding
  • Tumor suppressor gene
  • γ-Secretase

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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