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Figure 2.
Fig. 2. Structural homologues of BtuF. A, stereo pair of
the structural alignment of the N-terminal domains of BtuF and
E. coli FhuD bound to gallichrome (PBD accession number 1EFD).
BtuF is colored by domain as above, and vitamin B12 is shown in
ball-and-stick representation and colored magenta. FhuD is
colored gold with the bound gallichrome shown in bright green.
B, stereo pair of the structural alignment of domain II of BtuF
with the B12-binding domain of E. coli methionine synthase
(MetE, PDB accession number 1BMT). The corrin ring and DMB of
B12 are colored brown and red, respectively. MetE is colored
blue with the corrin ring and DMB of its bound B12 colored aqua
and cyan, respectively.
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