Repressor of jasmonate responses negatively regulated by the proteasome in an SCF(COI1) E3 ubiquitin-protein ligase complex-dependent manner. Involved in jasmonate (JA) signaling pathway during spikelet development. Targets directly the transcription activator MYC2 and suppresses the activity of MYC2 in triggering the transcription of MADS1 (PubMed:24647160). Interacts with COI1B in a coronatine-dependent manner. Coronatine is an analog of jasmonoyl isoleucine (JA-Ile) (PubMed:23320078, PubMed:24647160). Interacts with MYC2 (PubMed:24647160). Expressed in roots, stems, leaves, spikelets and seeds. By abscisic acid (ABA), wounding, and drought and salt stresses (PubMed:19618278). Induced by jasmonate (JA) (PubMed:23104764). Negatively regulated by the SCF(COI1) E3 ubiquitin ligase-proteasome pathway during JA signaling (PubMed:24647160). The jas domain (170-194) is required for interaction with COI1. Ubiquitinated (Probable). Increase in jasmonoyl isoleucine (JA-Ile) levels mediates its degradation via COI1B-mediated proteasome pathway (PubMed:24647160). Belongs to the TIFY/JAZ family. Truncated N-terminus. Truncated N-terminus. Truncated N-terminus. Truncated N-terminus. Truncated N-terminus.