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Plastocyanin in its oxidized (1bxu) and reduced (1bxv) state from Synechococcus sp. PCC 7942

• What structural elements are present in the protein?
• What is the subunit composition?
• What is the coordination geometry about each copper ion?
• What changes occur during oxidation-reduction reactions? Hint: You may want to align the structures and check distances.

Inoue, T., H. Sugawara, S. Hamanaka, H. Tsukui, E. Suzuki, T. Kohzuma, and Y. Kai. 1999. Crystal structure determinations of oxidized and reduced plastocyanin from the cyanobacterium Synechococcus sp. PCC 7942. Biochemistry 38:6063-6069.

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