Transcriptional activator. Common transcription factor of light, abscisic acid (ABA), and jasmonic acid (JA) signaling pathways. With MYC3 and MYC4, controls additively subsets of JA-dependent responses. In cooperation with MYB2 is involved in the regulation of ABA-inducible genes under drought stress conditions. Can form complexes with all known glucosinolate-related MYBs to regulate glucosinolate biosynthesis. Binds to the MYC recognition site (5'-CACATG-3'), and to the G-box (5'-CACNTG-3') and Z-box (5'-ATACGTGT-3') of promoters. Binds directly to the promoters of the transcription factors PLETHORA1 (PLT1) and PLT2 and represses their expression. Negative regulator of blue light-mediated photomorphogenic growth and blue- and far-red-light regulated gene expression. Activates multiple TIFY/JAZ promoters. Positive regulator of lateral root formation. Regulates sesquiterpene biosynthesis. Subjected to proteasome-dependent proteolysis. The presence of the destruction element (DE) involved in turnover is required for the function to regulate gene transcription. Down-regulated by KIN10 that controls its protein stability under a phosphorylation-dependent manner. Homotetramer. Tetramerization enhances DNA binding affinity (PubMed:28514654). Interacts (via N-terminus) with RGA, (via TAD domain) with the mediator subunit MED25, with TIC, MYC3, AFPH2/NINJA and the JAZ repressors TIFY10A/JAZ1, TIFY10B/JAZ2, TIFY6B/JAZ3, TIFY6A/JAZ4, TIFY11A/JAZ5, TIFY11B/JAZ6, TIFY5A/JAZ8, TIFY7/JAZ9, TIFY9/JAZ10, TIFY3A/JAZ11 and TIFY3B/JAZ12. Interacts with JAZ13 (via jas motif) (PubMed:25846245). Interacts with MYB28, MYB29, MYB34, MYB51, MYB76, MYB122 and mybe MYB2. Interacts with PYL6 in the nucleus. Interaction with PYL6 is increased in the presence of abscisic acid (PubMed:27357749). Interacts with KIN10 (PubMed:24890857). Widely expressed in the whole plant with the highest expression in stem. Constitutively expressed in dark- and light-grown seedlings. Detected early after abscisic acid (ABA) treatment or after dehydration and high-salt stresses. Induced by UV treatment. Up-regulated by methyl jasmonate and herbivory. The transcriptional activation domain (TAD) (149-188) overlaps with the destruction element (DE) (154-165). The JAZ-interaction domain (JID) (93-160) is sufficient for interaction with MYB proteins and most of the TIFY/JAZ proteins (PubMed:21335373 and PubMed:23943862). The C-terminal half contains an active nuclear localization signal (NLS). The phosphorylation at Thr-328 is increased by methyl jasmonate treatment, facilitates the proteolysis of the protein and is coupled to transcriptional activity (PubMed:23593022). The phosphorylation at Ser-563 by KIN10 represses its activity in the regulation of ABA-inducible genes (PubMed:24890857). Minor effect on jasmonic acid response and no effect on glucosinolate biosynthesis, but decreased abscisic acid sensitivity. Myc2 and myc3 double mutant has an increased insensitivity to jasmonic acid. Myc2 and myc4 double mutant has an increased insensitivity to jasmonic acid. Myc2, myc3 and myc4 triple mutant has no jasmonate-related defense response, is devoid of glucosinolates and is extremely susceptible to generalist herbivores.