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

TRPC1 and TRPC5 form a novel cation channel in mammalian brain.

TRP proteins are cation channels responding to receptor-dependent activation of phospholipase C. Mammalian (TRPC) channels can form hetero-oligomeric channels in vitro, but native TRPC channel complexes have not been identified to date. We demonstrate here that TRPC1 and TRPC5 are subunits of a heteromeric neuronal channel. Both TRPC proteins have overlapping distributions in the hippocampus. Coexpression of TRPC1 and TRPC5 in HEK293 cells resulted in a novel nonselective cation channel with a voltage dependence similar to NMDA receptor channels, but unlike that of any reported TRPC channel. TRPC1/TRPC5 heteromers were activated by G(q)-coupled receptors but not by depletion of intracellular Ca(2+) stores. In contrast to the more common view of the TRP family as comprising store-operated channels, we propose that many TRPC heteromers form diverse receptor-regulated nonselective cation channels in the mammalian brain.[1]


  1. TRPC1 and TRPC5 form a novel cation channel in mammalian brain. Strübing, C., Krapivinsky, G., Krapivinsky, L., Clapham, D.E. Neuron (2001) [Pubmed]
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