Transcriptional activator activated by proteolytic cleavage through regulated intramembrane proteolysis (RIP). Localized primarily in plasma membrane or endoplasmic reticulum membrane as dormant form and, upon specific stress or signal, is processed into a transcriptionally active and nuclear form after a proteolytic cleavage through regulated intramembrane proteolysis (RIP). Expressed in roots, rosette leaves, cauline leaves, shoot apex, stems and flowers. By cold, drought stress and methyl methanesulfonate (MMS) treatment. The NAC domain includes a DNA binding domain and a dimerization domain.