function:Transcription factor that recognizes and binds to the enhancer heptamer motif 5-TGA[CG]TCA-3.,PTM:Phosphorylation enhances the transcriptional activity. Phosphorylated by PRKDC.,similarity:Belongs to the bZIP family.,similarity:Belongs to the bZIP family. Jun subfamily.,similarity:Contains 1 bZIP domain.,subunit:Heterodimer with either FOS or BATF3. Interacts with HIVEP3 (By similarity). Interacts with SMAD3/SMAD4 heterodimers. Interacts with MYBBP1A, SPIB and TCF20. Interacts with COPS5, indirectly leading to its phosphorylation. Interacts with DSIPI, this interaction inhibits the binding of active AP1 to its target DNA.,