STIM1 couples to ORAI1 via an intramolecular transition into an extended conformation. - Muik M; Fahrner M; Schindl R; Stathopulos P; Frischauf I; Derler I; Plenk P; Lackner B; Groschner K; Ikura M; Romanin C (The EMBO journal, 2011)