"Chime Square" Animations Molecular Graphics Resource

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.

Photosynthetic reaction center from Rhodobacter sphaeroides under light (1aig) and dark (1aij) conditions

The iron lies towards the cytoplasmic side and the bacteriochlorophyll dimer lies towards the periplasmic side of the membrane.

• What structural elements are present in the protein?
• What is the subunit composition?
• What is the distance between metal centers?
• What is the coordination geometry about each metal ion?
• What has occurred during photoexcitation? Hint: You will need to align the structures.

Stowell, M. H. B., T. M. McPhillips, D. C. Rees, S. M. Soltis, E. Abresch, and G. Feher. 1997. Light-induced structural changes in photosynthetic reaction center: implications for mechanism of electron-proton transfer. Science 276:812-816.

Chime Square

Biochemistry and Molecular Biology Home Page

For more information or comments about this page contact:
eniederhoffer@siumed.edu