Extended Data Fig. 4: Interfaces of OppABCD in the pre-translocation state.
From: An oligopeptide permease, OppABCD, requires an iron–sulfur cluster domain for functionality
a, Gate residues on TMH4/5s in OppB and OppC in the pre-translocation state. TM helices are shown as cartoons, and the sidechains of the gate residues are shown as sticks and transparent spheres. b, e, Interfaces between chains are shown as colored areas. Substrate-bound OppABCD is shown as gray surface, and contact areas of OppA, OppB, OppC and OppD are colored in pink, green, cyan and wheat, respectively. c, f, The interface between OppB (green, orange α-helical hairpin) and OppA (pink) in front and back views, respectively. d, The interface between OppC (cyan) and OppA (pink). Hydrogen bonds are indicated by yellow dashed lines.
