Trafficking of stretch-regulated TRPV2 and TRPV4 channels inferred through interactomics

Transient receptor potential cation channels are emerging as important physiological and therapeutic targets. Within the vanilloid subfamily, transient receptor potential vanilloid 2 (TRPV2) and 4 (TRPV4) are osmo- and mechanosensors becoming critical determinants in cell structure and activity. However, knowledge is scarce regarding how TRPV2 and TRPV4 are trafficked to the plasma membrane or specific organelles to undergo quality controls through processes such as biosynthesis, anterograde/retrograde trafficking, and recycling. This review lists and reviews a subset of protein-protein interactions from the TRPV2 and TRPV4 interactomes, which is related to trafficking processes such as lipid metabolism, phosphoinositide signaling, vesicle-mediated transport, and synaptic-related exocytosis. Identifying the protein and lipid players involved in trafficking will improve the knowledge on how these stretch-related channels reach specific cellular compartments. This work was supported by Marie Curie International Outgoing Fellowship within the 7th European Community Framework Programme (PIOF-GA-2009-237120 to A.P.-M.), a Universitat Autònoma de Barcelona-Programa Banco de Santander Fellowship, and the Spanish Government grant MINECO BFU2017-87843-R to A.P.-M. P.D.-M. was a recipient of an FI fellowship from Generalitat de Catalunya (FI-2013FIB00251). I.R.D. was supported by the Carlos III Health Institute, co-financed with European Union European Regional Development Funds (CIBERCV CB16/11/00229), and by the Strategic Plan for research and health innovation (PERIS) (SLT006/17/00029).