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Figure 4.
The HPP-D10A active site in the presence of phosphate mimics
and the cofactor Mg^2+ (magenta sphere). The 2Fo-Fc
composite-omit electron density maps (gray cages) are contoured
at 1.5σ. (A) The 1.52 Å resolution structure of HPP-D10A
complexed with vanadate. Bond angles are O1-V-O2, 111.6°;
O2-V-O3, 122.9°; O1-V-O3, 117.7°; O1-V-OAsp8, 95.2°;
O2-V-OAsp8, 100.1°; O3-V-OAsp8, 102.3°. (B) The 1.07
Å resolution structure of HPP-D10A complexed with
tungstate. Bond angles are O1-W-O2, 112.8°; O2-W-O3,
118.8°; O1-W-O3, 112.3°; O1-W-O4, 103.8°; O2-W-O4,
104.1°; O3-W-O4, 102.9°{ideal bond angles tungstate [PDB
accession code 1FR3 (32)] O1-W-O2, 111.1°; O2-W-O3,
111.1°; O1-W-O3, 108.2°; O1-W-O4, 107.7°; O2-W-O4,
111.3°; O3-W-O4, 107.6°}. The water molecules are
depicted as red spheres.
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