Robuta

https://elifesciences.org/articles/07380v1
type iv pilusstructuremachineryopen
https://www.ncbi.nlm.nih.gov/Structure/pdb/6W6M
Type IV pilus secretin PilQ family protein
singleparticlecryoemstructurev
https://www.rcsb.org/structure/2YCH
PilM-PilN type IV pilus biogenesis complex
type iv pilusrcsb pdbbiogenesiscomplex