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    FEBS Lett. 2000 Feb 4;467(1):91-6.

    Interaction of the Grb7 adapter protein with Rnd1, a new member of the Rho family.

    Vayssière B, Zalcman G, Mahé Y, Mirey G, Ligensa T, Weidner KM, Chardin P, Camonis J.

    Unité INSERM 248, Institut Curie, 26 rue d'Ulm, F-75248, Paris, France.

    Grb7 is a member of a family of molecular adapters which are able to contribute positively but also negatively to signal transduction and whose precise roles remain obscure. Rnd1 is a member of the Rho family, but, as opposed to usual GTPases, it is constitutively bound to GTP. We show here that Rnd1 and Grb7 interact, in two-hybrid assays, in vitro, and in pull-down experiments performed with SK-BR3, a breast cancer cell line that overexpresses Grb7. This interaction involves switch II loop of Rnd1, a region crucial for guanine nucleotide exchange in all GTPases, and a Grb7 SH2 domain, a region crucial for Grb7 interaction with several activated receptors. The contribution of the interaction between Rnd1 and Grb7 to their respective functions and properties is discussed.

    PMID: 10664463 [PubMed - indexed for MEDLINE]

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