5U7G:
reference: Role of the CBP catalytic core in intramolecular SUMOylation and control of histone H3 acetylation., Park S, Stanfield RL, Martinez-Yamout MA, Dyson HJ, Wilson IA, Wright PE, Proc Natl Acad Sci U S A. 2017 Jul 3;114(27):E5335-E5342. doi:, 10.1073/pnas.1703105114. Epub 2017 Jun 19. PMID: 28630323

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).