title: TRPC3: a multifunctional signaling molecule.
abstract: TRPC3 represents one of the first identified mammalian relative of the Drosophila trp gene product. Despite extensive biochemical and biophysical characterization as well as ambitious attempts to uncover its physiological role in native cell systems, the channel protein still represents a rather enigmatic member of the TRP superfamily. TRPC3 is significantly expressed in the brain and heart and appears of (patho)physiological importance in both non-excitable and excitable cells, being potentially involved in a wide spectrum of Ca(2+) signaling mechanisms. TRPC3 cation channels display unique gating and regulatory properties that allow for recognition and integration of multiple input stimuli including lipid mediators, cellular Ca(2+) gradients, as well as redox signals. Physiological/pathophysiological functions of this highly versatile cation channel protein are as yet incompletely understood. Its ability to associate in a dynamic manner with a variety of partner proteins enables TRPC3 to serve coordination of multiple downstream signaling pathways and control of divergent cellular functions. Here, we summarize current knowledge on ion channel features as well as possible signaling functions of TRPC3 and discuss the potential biological relevance of this signaling molecule.
authors.affiliation: Institute of Pharmaceutical Sciences - Pharmacology and Toxicology, University of Graz, A-8010, Graz, Austria.
authors.forename: Michaela
authors.initials: M
authors.lastname: Lichtenegger
authors.forename: Klaus
authors.initials: K
authors.lastname: Groschner
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002463:Cell Membrane Permeability; D005786:Gene Expression Regulation; D020022:Genetic Predisposition to Disease; D006801:Humans; D015640:Ion Channel Gating; D008564:Membrane Potentials; D049990:Membrane Transport Modulators / Q000494:pharmacology; D008969:Molecular Sequence Data; D010641:Phenotype; D010766:Phosphorylation; D011487:Protein Conformation; D011499:Protein Processing, Post-Translational; D013329:Structure-Activity Relationship; D050052:TRPC Cation Channels / Q000737:chemistry / Q000187:drug effects / Q000235:genetics / Q000378:metabolism*
chemical_list: D049990:Membrane Transport Modulators; D050052:TRPC Cation Channels; C104603:TRPC3 cation channel