M
Mohamed Ibrahim
Researcher at King Saud University
Publications - 411
Citations - 7094
Mohamed Ibrahim is an academic researcher from King Saud University. The author has contributed to research in topics: Medicine & Chemistry. The author has an hindex of 39, co-authored 317 publications receiving 5376 citations. Previous affiliations of Mohamed Ibrahim include Sohag University & Indian Institute of Technology Roorkee.
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Journal ArticleDOI
Structures of the intermediates of Kok's photosynthetic water oxidation clock.
Jan Kern,Ruchira Chatterjee,Iris D. Young,Franklin D. Fuller,Louise Lassalle,Mohamed Ibrahim,Sheraz Gul,Thomas Fransson,Thomas Fransson,Aaron S. Brewster,Roberto Alonso-Mori,Rana Hussein,Miao Zhang,Lacey Douthit,Casper de Lichtenberg,Casper de Lichtenberg,Mun Hon Cheah,Dmitriy Shevela,J. Wersig,Ina Seuffert,Dimosthenis Sokaras,Ernest Pastor,Clemens Weninger,Thomas Kroll,Raymond G. Sierra,Pierre Aller,A. Butryn,Allen M. Orville,Mengning Liang,Alexander Batyuk,Jason E. Koglin,Sergio Carbajo,Sébastien Boutet,Nigel W. Moriarty,James M. Holton,James M. Holton,James M. Holton,Holger Dobbek,Paul D. Adams,Paul D. Adams,Uwe Bergmann,Nicholas K. Sauter,Athina Zouni,Johannes Messinger,Johannes Messinger,Junko Yano,Vittal K. Yachandra +46 more
TL;DR: Crystallography and spectroscopy are used to solve high-resolution structures of the intermediates of Kok’s S-state clock in photosystem II, revealing notable structural changes including the binding of one additional ‘water’, Ox, during the S2→S3 state transition.
Journal ArticleDOI
Primary retinal pathology in multiple sclerosis as detected by optical coherence tomography
Shiv Saidha,Stephanie B. Syc,Mohamed Ibrahim,Christopher Eckstein,Christina V. Warner,Sheena K. Farrell,Jonathan D. Oakley,Mary K Durbin,Scott A. Meyer,Laura J. Balcer,Elliot M. Frohman,Jason M. Rosenzweig,Scott D. Newsome,John N. Ratchford,Quan Dong Nguyen,Peter A. Calabresi +15 more
TL;DR: Findings support the possibility of primary retinal pathology in a subset of patients with multiple sclerosis in whom there appears to be disproportionate thinning of the inner and outer nuclear layers, which may be occurring as a primary process independent of optic nerve pathology.
Journal ArticleDOI
Structure of photosystem II and substrate binding at room temperature
Iris D. Young,Mohamed Ibrahim,Ruchira Chatterjee,Sheraz Gul,Franklin D. Fuller,Sergey Koroidov,Aaron S. Brewster,Rosalie Tran,Roberto Alonso-Mori,Thomas Kroll,Tara Michels-Clark,Hartawan Laksmono,Raymond G. Sierra,Claudiu A. Stan,Rana Hussein,Miao Zhang,Lacey Douthit,Markus Kubin,Casper de Lichtenberg,Long Vo Pham,Håkan Nilsson,Mun Hon Cheah,Dmitriy Shevela,Claudio Saracini,Mackenzie A. Bean,Ina Seuffert,Dimosthenis Sokaras,Tsu-Chien Weng,Ernest Pastor,Clemens Weninger,Thomas Fransson,Louise Lassalle,Philipp Bräuer,Pierre Aller,P. T. Docker,Babak Andi,Allen M. Orville,James M. Glownia,Silke Nelson,Marcin Sikorski,Diling Zhu,Mark S. Hunter,Thomas J. Lane,Andrew Aquila,Jason E. Koglin,Joseph Robinson,Mengning Liang,Sébastien Boutet,Artem Y. Lyubimov,Artem Y. Lyubimov,Monarin Uervirojnangkoorn,Monarin Uervirojnangkoorn,Nigel W. Moriarty,Dorothee Liebschner,Pavel V. Afonine,David G. Waterman,Gwyndaf Evans,Philippe Wernet,Holger Dobbek,William I. Weis,Axel T. Brunger,Petrus H. Zwart,Paul D. Adams,Paul D. Adams,Athina Zouni,Johannes Messinger,Johannes Messinger,Uwe Bergmann,Nicholas K. Sauter,Jan Kern,Jan Kern,Vittal K. Yachandra,Junko Yano +72 more
TL;DR: Ammonia, a water analogue, has been used as a marker, as it binds to the Mn4CaO5 cluster in the S2 and S3 states, and this approach, together with a comparison of the native dark and 2F states, is used to discriminate between proposed O–O bond formation mechanisms.
Journal ArticleDOI
Microcystic macular oedema, thickness of the inner nuclear layer of the retina, and disease characteristics in multiple sclerosis: a retrospective study
Shiv Saidha,Elias S. Sotirchos,Mohamed Ibrahim,Ciprian M. Crainiceanu,Jeffrey M. Gelfand,Yasir J. Sepah,John N. Ratchford,Jiwon Oh,Michaela A. Seigo,Scott D. Newsome,Laura J. Balcer,Elliot M. Frohman,Ari J. Green,Quan Dong Nguyen,Peter A. Calabresi +14 more
TL;DR: Increased baseline INL thickness in patients with MS was associated with the development of contrast-enhancing lesions and new T2 lesions, and relapses in Patients with relapsing-remitting MS during follow-up.
Journal ArticleDOI
Taking snapshots of photosynthetic water oxidation using femtosecond X-ray diffraction and spectroscopy
Jan Kern,Rosalie Tran,Roberto Alonso-Mori,Sergey Koroidov,Nathaniel Echols,Johan Hattne,Mohamed Ibrahim,Sheraz Gul,Hartawan Laksmono,Raymond G. Sierra,Richard J. Gildea,Guangye Han,Julia Hellmich,Julia Hellmich,Benedikt Lassalle-Kaiser,Ruchira Chatterjee,Aaron S. Brewster,Claudiu A. Stan,Carina Glöckner,Alyssa Lampe,D. DiFiore,Despina Milathianaki,Alan Fry,M. Marvin Seibert,Jason E. Koglin,Erik Gallo,Jens Uhlig,Dimosthenis Sokaras,Tsu-Chien Weng,Petrus H. Zwart,David Skinner,Michael J. Bogan,Marc Messerschmidt,Pieter Glatzel,Garth J. Williams,Sébastien Boutet,Paul D. Adams,Athina Zouni,Athina Zouni,Johannes Messinger,Nicholas K. Sauter,Uwe Bergmann,Junko Yano,Vittal K. Yachandra +43 more
TL;DR: The spectra show that the initial O-O bond formation, coupled to Mn-reduction, does not yet occur within 250 μs after the third flash, and the initial frames in a molecular movie of the structural changes during the catalytic reaction in photosystem II are represented.