Structural comparison of TraM214–322 to related proteins.
A, cartoon representation of TraMΔ, NTF2 (R. norvegicus, Protein Data Bank code 1OUN), the C-terminal and the central domain of TcpC (C. perfringens, Protein Data Bank code 3UB1), and the periplasmic domain of VirB8 from A. tumefaciens (Protein Data Bank code 2CC3) and B. suis (Protein Data Bank code 2BHM), respectively; secondary structure elements are highlighted (helices in cyan and strands in purple). B, comparison of the TraMΔ trimer to the TcpC trimer, formed by the central domains of TcpC monomers.