Research maps key signaling pathways linking calcium entry and exit in activated T cells

Like entrance and exit doors on a building, a cell's outer surface has doors -- channels, pumps, and transporters that selectively control what molecules enter or exit. In the immune system, T cells possess unique sets of 'doors', including ones that specialize in calcium ion movement. Now, researchers describe a unique mechanism for coordinating these calcium entrance and exit 'doors' on T cells that helps them carry out their jobs and ensure normal immune function.