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Figure 6.
Figure 6. Stereo view of a model of UMP bound to the active
site of the PyrR monomer from the dimer crystal structure.
Protein residues implicated in catalytic activity and/or UMP
coordination are shown with black bonds; UMP is shown with white
bonds; carbon atoms are white; oxygen, nitrogen and phosphorus
are shaded. Potential hydrogen bonds between the UMP base and
protein are shown as dashed lines. One of these hydrogen bonds
is to invariant Arg138 in the dimer loop. The figure was
prepared with the program MOLSCRIPT [71].
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