Transcriptional activator that binds specifically to the DNA sequence 5'-[AG]CCGAC-3'. Binding to the C-repeat/DRE element mediates cold or dehydration-inducible transcription. CBF/DREB1 factors play a key role in freezing tolerance and cold acclimation. By high-salt stress. Belongs to the AP2/ERF transcription factor family. ERF subfamily.