5VAW:
reference: The Structure of PilA from Acinetobacter baumannii AB5075 suggests a mechanism for functional specialization in Acinetobacter type IV pili., Ronish LA, Lillehoj E, Fields JK, Sundberg EJ, Piepenbrink KH, J Biol Chem. 2018 Nov 9. pii: RA118.005814. doi: 10.1074/jbc.RA118.005814. PMID: 30413536

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