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Figure 4.
Fig. 4. Structure of SufI. (a) Cartoon representation of
SufI. The structure shown is for chain A of the orthorhombic
space group with domain 1 shown in red, domain 2 in green and
domain 3 in blue. Regions of missing density are shown as black
dotted lines. The arrow in the region of missing density
indicates where the protein is subject to proteolytic cleavage.
(b) Stereo view showing CueO (blue) overlaid on the orthorhombic
SufI (red) structure. PDB ID 1KV7 was overlaid onto the
orthorhombic chain A of SufI with the program CCP4-Lsqkab. The
positions of the N- and C-termini of the proteins are shown and
the tower region of CueO is labelled for reference. The
orientation is as in (a). (c) Stereo view showing representative
electron density (2F[o] − F[c]) of orthorhombic chain A,
residues 107–131 contoured at 1σ. The positions of the
invariant residues leucine 112, arginine 118, tryptophan 126 and
proline 128 are labelled.
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