Repressor of jasmonate responses. Interacts with MYC2, AFPH2/NINJA, TIFY10A/JAZ1, TIFY10B/JAZ2, TIFY11A/JAZ5, TIFY11B/JAZ6, TIFY5A/JAZ8 and TIFY9/JAZ10. (Microbial infection) Interacts with the pathogenic Pseudomonas syringae HopZ1a protein. (Microbial infection) Triggered to degradation by the pathogenic Pseudomonas syringae HopZ1a protein in a COI1-dependent manner, thereby activating host jasmonate signaling. Up-regulated by wounding and herbivory. The jas domain (139-163) is required for interaction with COI1 and Pseudomonas syringae HopZ1a. (Microbial infection) Acetylated by Pseudomonas syringae HopZ1a. Ubiquitinated. Targeted for degradation by the SCF(COI1) E3 ubiquitin ligase-proteasome pathway during jasmonate signaling. Belongs to the TIFY/JAZ family.