Binds selectively to the DNA sequence 5'-[GA]GATAA-3' and may act as a transcription factor involved in the regulation of drought-responsive genes. Enhances stomatal closure in response to abscisic acid (ABA). Confers drought and salt tolerance. Localizes predominantly to the nucleus and, to a lesser extent, to the cytosol. Up-regulated by drought, high salinity, and ABA.