Athina Zouni
Humboldt University of Berlin
123 Papers
1.2K Citations
Athina Zouni is an academic researcher from Humboldt University of Berlin. The author has contributed to research in topics: Photosystem II & Photosystem I. The author has an hindex of 41, co-authored 110 publications. Previous affiliations of Athina Zouni include Technical University of Berlin.
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Papers
Crystal structure of photosystem II from Synechococcus elongatus at 3.8 A resolution.
Athina Zouni,Horst Tobias Witt,Jan Kern,Petra Fromme,Norbert Krauss,Wolfram Saenger,Peter Orth +6 more
TL;DR: The X-ray structure of photosystem II is described on the basis of crystals fully active in water oxidation, shows how protein subunits and cofactors are spatially organized and the larger subunits are assigned and the locations and orientations of the cofacters are defined.
1.9K
Towards complete cofactor arrangement in the 3.0 Å resolution structure of photosystem II
TL;DR: The most complete cyanobacterial photosystem II structure obtained so far is described, showing locations of and interactions between 20 protein subunits and 77 cofactors per monomer, and provides information about the Mn4Ca cluster, where oxidation of water takes place.
1.8K
Cyanobacterial photosystem II at 2.9-Å resolution and the role of quinones, lipids, channels and chloride
Albert Guskov,Jan Kern,Jan Kern,Azat Gabdulkhakov,Matthias Broser,Athina Zouni,Wolfram Saenger +6 more
TL;DR: Putative oxygen positions obtained from a Xenon derivative indicate a role for lipids in oxygen diffusion to the cytoplasmic side of PSII, and the chloride position suggests a role in proton-transfer reactions.
1.1K
Where water is oxidized to dioxygen: structure of the photosynthetic Mn4Ca cluster.
Junko Yano,Jan Kern,Kenneth Sauer,Kenneth Sauer,Matthew J. Latimer,Yulia Pushkar,Yulia Pushkar,Jacek Biesiadka,Bernhard Loll,Wolfram Saenger,Johannes Messinger,Athina Zouni,Vittal K. Yachandra +12 more
TL;DR: Polarized extended x-ray absorption fine structure measurements on PSII single crystals constrain the Mn4Ca cluster geometry to a set of three similar high-resolution structures, unlike either the 3.0 or 3.5 angstrom–resolution x-rays or other previously proposed models.
X-ray damage to the Mn4Ca complex in single crystals of photosystem II: A case study for metalloprotein crystallography
Junko Yano,J. Kern,K.-D. Irrgang,Matthew J. Latimer,Uwe Bergmann,Pieter Glatzel,Yulia Pushkar,Jacek Biesiadka,Bernhard Loll,Kenneth Sauer,Johannes Messinger,Athina Zouni,Vittal K. Yachandra +12 more
TL;DR: This case study shows that a careful evaluation of the structural intactness of the active site(s) by spectroscopic techniques can validate structures derived from crystallography and that it can be a valuable complementary method before structure-function correlations of metalloproteins can be made on the basis of high-resolution x-ray crystal structures.
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