Transcription factor involved in the regulation of calcium ion homeostasis and required for the maintenance of membrane integrity. Binds to the calcineurin-dependent response element. Plays a role in azole tolerance. Localizes in the nucleus in a calcium- and calcineurin-dependent manner. Expression is higher in white cells than opaque cells. Induced during exposure to the weak acid stress of acetic acid, through the regulation by the transcription factor MNL1. Probably phosphorylated in a calcineurin-dependent manner. Leads to hypersensitivity to ion stress.