Repressor of jasmonate (JA) responses that lacks the entire Jas domain and possesses severe JA insensitivity and resistance to JA-induced degradation (PubMed:19151223, PubMed:17675405, PubMed:23632853). Acts as an endogenous repressor of JA signal output in JA-stimulated cells (PubMed:19151223). Modulator of JA-controlled growth inhibition in response to wounding (PubMed:17675405). Repressor of jasmonate (JA) responses that lacks part of the Jas domain and possesses JA insensitivity and partial resistance to JA-induced degradation. Repressor of jasmonate (JA) responses (PubMed:19151223). Interacts with and suppresses RHD6 and RSL1 transcription factor activities to negatively regulate jasmonate-stimulated root hair development (PubMed:31988260). Homo- and heterodimer. Interacts with MYC2, MYC3, MYC4, AFPH2/NINJA, TIFY10A/JAZ1, TIFY10B/JAZ2, TIFY6B/JAZ3, TIFY6A/JAZ4, TIFY11B/JAZ6, TIFY5A/JAZ8, TIFY7/JAZ9, TIFY3A/JAZ11 and TIFY3B/JAZ12. Isoform 1 and isoform 2 interact with COI1. Isoform 3 does not interact with COI1 (PubMed:19151223, PubMed:19309455, PubMed:20360743, PubMed:23632853). Interacts with RHD6 and RSL1 (PubMed:31988260). Isoform 1, isoform 2 and isoform 3 are localized to the nucleus. Up-regulated by jasmonate, wounding and herbivory. The tify domain is required for dimerization. The jas domain (168-193) is required for interaction with COI1. Binds to MYC2 via a cryptic CMID domain (16-58) instead of the absent jas domain. Ubiquitinated. Targeted for degradation by the SCF(COI1) E3 ubiquitin ligase-proteasome pathway during jasmonate signaling. Lacks the entire Jas domain and is highly resistant to jasmonate-induced degradation mediated by the 26S-proteasome pathway. Not involved in jasmonate responses regulation. Belongs to the TIFY/JAZ family.