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

Synaptic multiprotein complexes associated with 5-HT(2C) receptors: a proteomic approach.

Membrane-bound receptors such as tyrosine kinases and ionotropic receptors are associated with large protein networks structured by protein-protein interactions involving multidomain proteins. Although these networks have emerged as a general mechanism of cellular signalling, much less is known about the protein complexes associated with G-protein-coupled receptors (GPCRs). Using a proteomic approach based on peptide affinity chromatography followed by mass spectrometry and immunoblotting, we have identified 15 proteins that interact with the C- terminal tail of the 5-hydroxytryptamine 2C (5-HT(2C)) receptor, a GPCR. These proteins include several synaptic multidomain proteins containing one or several PDZ domains (PSD95 and the proteins of the tripartite complex Veli3-CASK-Mint1), proteins of the actin/spectrin cytoskeleton and signalling proteins. Coimmunoprecipitation experiments showed that 5-HT(2C) receptors interact with PSD95 and the Veli3-CASK-Mint1 complex in vivo. Electron microscopy also indicated a synaptic enrichment of Veli3 and 5-HT(2C) receptors and their colocalization in microvilli of choroidal cells. These results indicate that the 5-HT(2C) receptor is associated with protein networks that are important for its synaptic localization and its coupling to the signalling machinery.[1]


  1. Synaptic multiprotein complexes associated with 5-HT(2C) receptors: a proteomic approach. Bécamel, C., Alonso, G., Galéotti, N., Demey, E., Jouin, P., Ullmer, C., Dumuis, A., Bockaert, J., Marin, P. EMBO J. (2002) [Pubmed]
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