Vittal K Yachandra1, Junko Yano. 1. Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. VKYachandra@lbl.gov
Abstract
This review describes the results from X-ray Absorption Spectroscopy studies that have contributed to an understanding of the role of Ca in the photosynthetic water-oxidation reaction. The results include the first Mn, Ca and Sr X-ray spectroscopy studies using Ca or Sr-substituted PS II samples that established the presence of a MnCa heteronuclear structure and its orientation, and the most recent Sr X-ray spectroscopy study using biosynthetically prepared Sr-containing PS II in the various S-states that provide important insights into the requirement for Ca in the mechanism of the Mn(4)Ca catalytic center.
This review describes the results from X-ray Absorption Spectroscopy studies that have contributed to an understanding of the role of Ca in the photosynthetic water-oxidation reaction. The results include the first Mn, Ca and pan class="Chemical">Sr X-ray spectroscopy studies using Ca or Sr-substituted PS II samples that established the presence of a MnCa heteronuclear structure and its orientation, and the most recent Sr X-ray spectroscopy study using biosynthetically prepared Sr-containing PS II in the various S-states that provide important insights into the requirement for Ca in the mechanism of the Mn(4)Ca catalytic center.
Authors: Roehl M Cinco; Karen L McFarlane Holman; John H Robblee; Junko Yano; Shelly A Pizarro; Emanuele Bellacchio; Kenneth Sauer; Vittal K Yachandra Journal: Biochemistry Date: 2002-10-29 Impact factor: 3.162
Authors: D J MacLachlan; B J Hallahan; S V Ruffle; J H Nugent; M C Evans; R W Strange; S S Hasnain Journal: Biochem J Date: 1992-07-15 Impact factor: 3.857