O-layer structure (TrwH/VirB7, TrwF/VirB9CTD, TrwE/VirB10CTD) of the outer membrane core complex from the fully-assembled R388 type IV secretion system determined by cryo-EM.
7o3j is a 42 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.