Detection of cellular proteins that interact with the NF2 tumor suppressor gene product

Hideo Takeshima, Ichiro Izawa, Polly S.Y. Lee, Naueen Safdar, Victor A. Levin, Hideyuki Saya

Research output: Contribution to journalArticlepeer-review

60 Citations (Scopus)


The neurofibromatosis type 2 (NF2) gene was recently cloned, and the protein it encodes (merlin) was revealed to belong to a family of proteins that link cytoskeletal components with proteins in the cell membrane. To elucidate the biological function of merlin, we produced a bacterial fusion protein consisting of glutathione S-transferase and merlin and used it to detect five merlin-binding cellular proteins, designated p165, p145, p125, p85 and p70, by a protein-binding assay. p165 and merlin were phosphorylated on serine/threonine residues, and immunoprecipitation showed that p85 bound the native form of merlin. Although the entire merlin-ezrin-radixin-moesin (MERM) homology domain of merlin was found to be essential for binding to all five proteins, the MERM homology domains of ezrin and moesin did not bind to any of the five proteins. Since most reported NF2 mutations are in the region we determined was necessary for binding, the mutations probably impair binding. Therefore, the formation of the protein complex is probably crucial for tumor suppression.

Original languageEnglish
Pages (from-to)2135-2144
Number of pages10
Issue number8
Publication statusPublished - 08-1994
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Genetics
  • Cancer Research


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