 | Acta Crystallographica Section D Acta Crystallographica Section D BIOLOGICAL CRYSTALLOGRAPHY |
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![[Figure 3]](gx5113fig3mag.jpg)
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Figure 3
Rac1 zinc-coordination sites. (a) The coordination of zinc by switch I. Chain A is shown in magenta, chain B in yellow and chain D in green. Zinc is shown in dark orange and the coordinated water molecule in light blue. The dashed red lines indicate the zinc-coordination interactions. The Fo − Fc map is show in gray at 20σ and was calculated without zinc. (b) Zinc replaces magnesium. The octahedral coordination of zinc at the normal magnesium-binding site in chain C is shown. Zinc is shown in dark orange and the coordinated water molecules in light blue. The dashed red lines indicate the zinc-coordination interactions. The Fo − Fc map is shown in gray at 20σ and was calculated without zinc. (c) Coordination of zinc by switch II. Each residue participating in the coordination of zinc (dark orange) is drawn in both chain A (magenta) and a symmetry-related chain A (green). The coordination of zinc is indicated by dashed red lines. The Fo − Fc map is drawn in gray at a contour level of 20σ and was calculated without the Zn atom. The asterisk indicates a residue donated from a Rac1 in a crystallographically related asymmetric unit. (d) Crystal-packing interaction involving zinc. Residues from chain A are shown in magenta and residues from a symmetry-related chain C are shown in green. The coordination of zinc is indicated by dashed red lines. The Fo − Fc map is drawn in gray at a contour level of 9σ and was calculated without the Zn atom. The asterisk indicates a residue donated from a Rac1 in a crystallographically related asymmetric unit. |
![[Figure 3]](gx5113fig3.jpg)
| BIOLOGICAL CRYSTALLOGRAPHY |
ISSN: 1399-0047
