The osmosensory transporter coiled coil is a C-terminal domain found in various bacterial osmoprotective transporters, such as ProP, Proline/betaine transporter, Proline permease 2 and the citrate proton symporters. It adopts an antiparallel coiled-coil structure, and is essential for osmosensory and osmoprotectant transporter function.
Jiyao W et al.(2023). "The conserved domain database in 2023.",