5ZJ4:
reference: Substrate N(2) atom recognition mechanism in pierisin family DNA-targeting guanine-specific ADP-ribosyltransferase ScARP., Yoshida T, Tsuge H, J Biol Chem. 2018 Aug 2. pii: AC118.004412. doi: 10.1074/jbc.AC118.004412. PMID: 30072382

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