5DGK:
reference: Staphylococcal SCCmec elements encode an active MCM-like helicase and thus may be replicative., Mir-Sanchis I, Roman CA, Misiura A, Pigli YZ, Boyle-Vavra S, Rice PA, Nat Struct Mol Biol. 2016 Aug 29. doi: 10.1038/nsmb.3286. PMID: 27571176

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