X-Ray spectroscopy of the photosynthetic oxygen-evolving complex.
Water oxidation to dioxygen in photosynthesis is catalyzed by a Mn(4)Ca cluster with O bridging in Photosystem II (PS II) of plants, algae and cyanobacteria. A variety of spectroscopic methods have been applied to analyzing the participation of the complex. X-ray spectroscopy is particularly useful because it is element-specific, and because it can reveal important structural features of the complex with high accuracy and identify the participation of Mn in the redox chemistry. Following a brief history of the application of X-ray spectroscopy to PS II, an overview of newer results will be presented and a description of the present state of our knowledge based on this approach.
Sauer
Kenneth
K
Department of Chemistry, University of California, Berkeley, CA 94707-5230.
Yano
Junko
J
Yachandra
Vittal K
VK