Apoplastocyanin, structure

Apometallothioneins metal binding models, 6, 673 Apoplastocyanin structure, 6, 650 Aquadioxo cations, 2, 296 Aquapentaammine complexes structure, 1, 8... 

Apo MoFe protein, 47 176, 180-181, 182 Apoplastocyanin, structure, 36 384-385 Apoproteins, selenium-substituted, preparation, 38 80-82... 

The crystal structure of poplar apoplastocyanin has been reported at 1.8 A resolution [42]. The structure closely resembles that of the holoprotein, and positions of the Cu-binding residues are different by only 0.1-0.3 A. Tetrahedral coordination, with proportionately larger metal-ligand bond distances, is also observed on replacing the Cu by Hg(II) [43]. This suggests that the irregular geometry of the active site is imposed on the metal atom by the polypeptide... 

The essential role of the protein in this context is supported strongly by comparison with the structure of the apoplastocyanin, determined at 1.8 A resolution.914 The structures of apoplastocyanin and Cu-plastocyanin are very similar, showing that the irregular geomtry of the type 1 site is imposed upn the metal by the polypeptide. Only five residues in plastocyanin undergo... 

Figure 36 The structures of plastocyanin and apoplastocyanin (reproduced with permission from J. Biol. Chem., 1984, 259, 2822)...

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