FIGURE 4.

Proposed C-terminal targeting sequence-binding pocket of BamD. a, superimposed ribbon diagrams of BamD (gray) and the C-terminal domain of PEX5 (blue), a peroxisomal targeting sequence receptor. The PTS1 peptide, the peroxisomal targeting sequence that is recognized and bound by PEX5, is shown in red. b, in the BamCD complex, part of the unstructured region of BamC (red) blocks the proposed C-terminal targeting sequence-binding pocket of BamD (gray). PTS1 (black outline) is shown for reference.