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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

MIP-T3, a novel protein linking tumor necrosis factor receptor-associated factor 3 to the microtubule network.

In this study, we report the identification of a novel tumor necrosis factor receptor-associated factor 3 (TRAF3)-interacting protein designated MIP-T3. MIP-T3 is a 83-kDa protein with no significant homology to known mammalian proteins. MIP-T3 mRNA and TRAF3 mRNA are ubiquitously expressed, and TRAF3 is the only TRAF protein to interact with MIP-T3. The MIP-T3-TRAF3 interaction requires the coiled-coil TRAF-N domain of TRAF3. To our knowledge, this is the first case of a TRAF-binding protein that interacts with a single member of the TRAF family specifically through a TRAF-N coiled-coil domain. MIP-T3 binds to Taxol- stabilized microtubules and to tubulin in vitro, and MIP-T3 recruits TRAF3 to microtubules when both proteins are overexpressed in HeLa cells. In a 293 cell line stably expressing CD40, TRAF3 is released from the TRAF3.MIP-T3 complex and recruited to the CD40 receptor upon CD40 ligand stimulation. MIP-T3 may provide a novel mechanism in sequestering TRAF3 to the cytoskeletal network.[1]


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