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

Identification of interaction partners of the cytosolic polyproline region of CD95 ligand ( CD178).

The CD95/Fas/Apo-1 ligand ( CD95L, CD178) induces apoptosis through the death receptor CD95. CD95L was also described as a co-stimulatory receptor for T-cell activation in mice in vivo. The molecular basis for the bidirectional signaling capacity and directed expression of CD95L is unknown. In the present study we identify proteins that precipitate from T-cell lysates with constructs containing fragments of the CD95L cytosolic tail. The determined peptide mass fingerprints correspond to Grb2, actin, beta-tubulin, formin binding protein 17 (FBP17) and PACSIN2. Grb2 had been identified as a putative mediator of T-cell receptor-to- CD95L signaling before. FBP17 and PACSIN2 may be associated with expression and trafficking of CD95L. When overexpressed, CD95L co-precipitates with FBP17 and PACSIN. Protein-protein interactions are mediated via Src homology 3 (SH3) domain binding to the polyproline region of CD95L and can be abolished by mutation or deletion of the respective SH3 domain.[1]


  1. Identification of interaction partners of the cytosolic polyproline region of CD95 ligand (CD178). Ghadimi, M.P., Sanzenbacher, R., Thiede, B., Wenzel, J., Jing, Q., Plomann, M., Borkhardt, A., Kabelitz, D., Janssen, O. FEBS Lett. (2002) [Pubmed]
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