Figure 5.
Figure 5. A: Calcium binding loop of molecule B with the final
|2F[o] - Fc| electron density for the calcium ion drawn at 4
.
The calcium coordinations with loop residues, Asp 49, phosphate
ion and the water molecule are also indicated. B: Superposition
of the calcium binding loops of molecules A (green) and B
(yellow). The calcium free loop of molecule A adopts a narrow
conformation. C: Calcium binding loop of molecule A. The
arginine 31 from molecule B is also shown. The intraloop
hydrogen bond between Cys27 O and Gly33 N is indicated by green
dotted line. D: The final |2F[o] - Fc| electron density for the
calcium ion drawn at 4 at
the interface of the two molecules. Calcium coordinated
intermolecular interactions are indicated by dotted lines. The
coordination is sevenfold with trigonal bipyramidal geometry.
The above figure is reprinted
by permission from John Wiley & Sons, Inc.:
Proteins
(2005,
59,
856-863)
copyright 2005.
.
The calcium coordinations with loop residues, Asp 49, phosphate
ion and the water molecule are also indicated. B: Superposition
of the calcium binding loops of molecules A (green) and B
(yellow). The calcium free loop of molecule A adopts a narrow
conformation. C: Calcium binding loop of molecule A. The
arginine 31 from molecule B is also shown. The intraloop
hydrogen bond between Cys27 O and Gly33 N is indicated by green
dotted line. D: The final |2F[o] - Fc| electron density for the
calcium ion drawn at 4