PHD_oberon is a plant homeodomain finger domain of Oberon proteins from plants. Oberon is necessary for maintenance and/or establishment of both the shoot and root apical meristems in Arabidopsis. Oberon proteins are made up of a PHD finger domain and a coiled-coil domain. The PHD-finger domain is found in a wide variety of proteins involved in the regulation of chromatin structure. Oberon proteins mediate the TMO7 (the direct target of MP) expression through modification of, or binding to, chromatin at the TMO7 locus. TMO7 stands for the target of Monopteros 7 (MP) (or Auxin response factor 7).