Transcriptional activator that binds specifically to the DNA sequence 5'-TGACG-3'. Recognizes ocs elements like the as-1 motif of the cauliflower mosaic virus 35S promoter. Binding to the as-1-like cis elements mediate auxin- and salicylic acid-inducible transcription. Required to induce the systemic acquired resistance (SAR) via the regulation of pathogenesis-related genes expression. Binding to the as-1 element of PR-1 promoter is salicylic acid-inducible and mediated by NPR1. Could also bind to the Hex-motif (5'-TGACGTGG-3') another cis-acting element found in plant histone promoters. Binds DNA as a dimer. Interacts with NPR1, NPR3 and NPR4. Interacts with GRXC7/ROXY1. Expressed in the whole plant. Belongs to the bZIP family.