Transcription factor. Interacts specifically with the W box (5'-(T)TGAC[CT]-3'), a frequently occurring elicitor-responsive cis-acting element. Acts also as a disease resistance protein involved in resistance to fungal and bacterial pathogens, including R.solanacearum, P.syringae pv. tomato and C.higginsianum. In presence of RPS4, elicites an EDS1-dependent hypersensitive response (PubMed:24146667). Interacts with PopP2, a R.solanacearum type III effector. Loss of resistance to C.higginsianum. Ecotypes susceptible to C.higginsianum or R.solanacearum, such as cv. Columbia, contain a protein with a premature stop codon while the longer allele found in cv. Nd-1, cv. Wassilewskija or cv. RLD confers resistance.