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Eric C. Niederhoffer, Ph.D. Associate Professor of Biochemistry and Molecular Biology Southern Illinois University School of Medicine 600 Agriculture Drive, Carbondale, IL 62901-6503 Rm 112 Lindegren, 618-453-6467 eniederhoffer@siumed.edu Copyright 2000- , E.C. Niederhoffer. All Rights Reserved. All trademarks and copyrights are the property of their respective owners.

Changes upon oxidation-reduction of ferredoxin I (7fd1, 7fdr) from Azotobacter vinelandii

• What structural elements are present in the protein?
• What is the subunit composition?
• What is the coordination geometry about the metal centers?
• What is the distance between metal centers and ligands?
• What changes have occurred upon oxidation-reduction? Hint: You will need to align the structures and look at the orientation of amino acid residues.

Schipke, C. G., Goodin, D. B., McRee, D. E., Stout, C. D. 1999. Oxidized and reduced Azotobacter vinelandii ferredoxin I at 1.4 Å resolution: conformational change of surface residues without significant change in the [3Fe-4S]+/0 cluster. Biochemistry 38:8228-8239.

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