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Figure 7.
Figure 7 Molecular surfaces of (a) apo-form PhoMPGP open
conformation, (b) apo-form PhoMPGP closed conformation and (c)
holo-form PhoMPGP. The sequestered surface in (c) is indicated
in dark grey in (a) and (b). (d) Ribbon model of holo-form
PhoMPGP viewed from the same angle as in (c). In (d), the
phosphate and magnesium ions are indicated by a stick model and
as a sphere, respectively. The mesh indicates the cavity
detected by the program VOIDOO (Kleywegt & Jones, 1994[Kleywegt,
G. J. & Jones, T. A. (1994). Acta Cryst. D50, 178-185.]) with a
probe 1.4 Å in radius. The cavity had an ovoid-like shape
with one protrusion where the phosphate ion binds in the active
site.
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