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Yulia Pushkar
Researcher at Purdue University
Publications - 100
Citations - 5192
Yulia Pushkar is an academic researcher from Purdue University. The author has contributed to research in topics: Electron paramagnetic resonance & Catalysis. The author has an hindex of 34, co-authored 93 publications receiving 4665 citations. Previous affiliations of Yulia Pushkar include European Synchrotron Radiation Facility & Lawrence Berkeley National Laboratory.
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Journal ArticleDOI
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.
Journal ArticleDOI
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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Serial time-resolved crystallography of photosystem II using a femtosecond X-ray laser.
Christopher Kupitz,Shibom Basu,Ingo Grotjohann,Raimund Fromme,Nadia A. Zatsepin,Kimberly N. Rendek,Mark S. Hunter,Mark S. Hunter,Robert L. Shoeman,Thomas A. White,Dingjie Wang,Daniel James,Jay-How Yang,Danielle E. Cobb,Brenda Reeder,Raymond G. Sierra,Haiguang Liu,Anton Barty,Andrew Aquila,Daniel P. DePonte,Richard A. Kirian,Sadia Bari,Jesse J. Bergkamp,Kenneth R. Beyerlein,Michael J. Bogan,Carl Caleman,Tzu-Chiao Chao,Tzu-Chiao Chao,Chelsie E. Conrad,Katherine M. Davis,Holger Fleckenstein,Lorenzo Galli,Stefan P. Hau-Riege,Stephan Kassemeyer,Hartawan Laksmono,Mengning Liang,Lukas Lomb,Stefano Marchesini,Andrew V. Martin,Marc Messerschmidt,Despina Milathianaki,Karol Nass,Alexandra Ros,Shatabdi Roy-Chowdhury,Kevin Schmidt,M. Marvin Seibert,M. Marvin Seibert,Jan Steinbrener,Francesco Stellato,Lifen Yan,Chun Hong Yoon,Thomas A. Moore,Ana L. Moore,Yulia Pushkar,Garth J. Williams,Sébastien Boutet,R. Bruce Doak,Uwe Weierstall,Matthias Frank,Henry N. Chapman,John C. H. Spence,Petra Fromme +61 more
TL;DR: Time resolved experiments on PSII nano/microcrystals from Thermosynechococcus elongatus performed with the recently developed technique of serial femtosecond crystallography provide evidence that PSII undergoes significant conformational changes at the electron acceptor side and at the Mn4CaO5 core of the OEC.
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A highly reactive mononuclear non-heme manganese(IV)-oxo complex that can activate the strong C-H bonds of alkanes
Xiujuan Wu,Mi Sook Seo,Katherine M. Davis,Yong Min Lee,Junying Chen,Kyung Bin Cho,Yulia Pushkar,Wonwoo Nam +7 more
TL;DR: It is proposed that C-H bond activation by the non-heme Mn(IV)-oxo complex does not occur via an oxygen-rebound mechanism.
Journal ArticleDOI
High-resolution Mn EXAFS of the oxygen-evolving complex in photosystem II: structural implications for the Mn4Ca cluster.
Junko Yano,Yulia Pushkar,Pieter Glatzel,Azul Lewis,K. Sauer,Johannes Messinger,Uwe Bergmann,Vittal K. Yachandra +7 more
TL;DR: High-resolution EXAFS method data is presented that shows three short Mn-Mn distances between 2.7 and 2.8 A and, hence, the presence of three di-mu-oxo-bridged units in the Mn4Ca cluster, imposing clear limitations on the proposed structures based on spectroscopic and diffraction data and provides input for refining such structures.