Determination by X-Ray Absorption of Redox Induced Structural Changes in Iron-Sulfur Cluster F_{x} in Photosystem I

• Authors: I. Sagi , G. Bunker , Y. Hochman , C. Carmeli , M.T. Zeng
• Languages of publication: EN

Abstracts

EN

X-ray absorption spectra of photosystem I core protein containing F_{x}, the low potential iron-sulfur cluster was measured. X-ray absorption of the iron K-edge was obtained in the reduced and oxidized forms of F_{x}. An edge shift of 0.5 eV to lower energy and a change in the X-ray absorption near edge structure was observed. Some of the alterations in edge shape of F_{x} are interpreted to indicate structural changes of the iron-sulfur cluster in F_{x} upon reduction.

Keywords

EN

78.70.Dm

• Journal: Acta Physica Polonica A
• Year: 1997
• Volume: 91
• Issue: 5
• Pages: 871-875

Dates

published

1997-05

Contributors

author

I. Sagi

• Department of Structural Biology, The Weizmann Institute of Science, Rehovot, Israel

author

G. Bunker

• Department of Physics, Illinois Institute of Technology, Chicago, Illinois 60616, USA

author

Y. Hochman

• Department of Biochemistry, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel

author

C. Carmeli

• Department of Biochemistry, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel

author

M.T. Zeng

• Department of Biochemistry, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel