Repressor of jasmonate responses. Interacts with COI1A and COI1B in a coronatine-dependent manner. Coronatine is an analog of jasmonoyl isoleucine (JA-Ile). By jasmonate, wounding, and cold, drought and salt stresses. Down-regulated by abscisic acid (ABA). The jas domain (164-189) is required for interaction with COI1. Ubiquitinated. Targeted for degradation by the SCF(COI1) E3 ubiquitin ligase-proteasome pathway during jasmonate signaling. Belongs to the TIFY/JAZ family.