Fig. 4.
Three-dimensional model of sumoylated Notch1 transcription complex. CSL (light green), MAML1 (purple), DNA (orange), ANK repeat domain (cyan), and the N-terminal part (until E1777) of the RAM peptide (cyan) are from the crystal structure of the Notch1 transcription complex (PDB 3V79; 56). The C-terminal part of the RAM peptide (A1778-D1790) containing the sumoylated K1780 (shown as a representative for sumoylation with cyan spheres), K1781 and K1782 was modeled, along with SUMO (green) and the E2-conjugating enzyme Ubc9 (wheat), using the crystal structure of sumoylated Ran GTPase-activating protein 1 (PDB 3UIP; 80) as a template for modeling