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Figure 3.
Figure 3. Stereo view of the superimposed H171A–ADS (pink),
H171N–AMP•FUM (blue) and dδc1-SO[4]^2- (yellow) active
sites, showing the conformation of the C3 loop in the proteins.
Since the C3 loop in the SeMet protein could not be modeled due
to the absence of electron density, the open conformation of the
loop observed in the dδc2-S281A mutant^12 is also shown for
comparison (green). The side-chains of selected C3 loop residues
are shown and numbered according to the E. coli ADL sequence.
PyMol was used for Figure preparation.
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