Cu(II)


Coordination: His 46, Cys 112, Met 121 and His 117, Gly 45




Azurin
Active site coordination geometry
Taken from the original crystal structures from Pseudomonas aeruginosa,


PDB Codes 5AZU and 1E5Z
Note: Continuation of the protein is represented by a purple atom

When the Cu(II) is reduced to Cu(I), the Met 121 moves closer and the Gly 45 moves away





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Cu(I)


Coordination: His 46, Cys 112, Met 121, His 117 (and Gly 45)