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Orientation of Calcium in the Mn4Ca Cluster of the Oxygen-Evolving Complex Determined Using Polarized Strontium EXAFS of Photosystem II Membranes

Autor: John H. Robblee, Kenneth Sauer, Vittal K. Yachandra, Karen L. McFarlane Holman, Carmen Fernandez, Johannes Messinger, Roehl M. Cinco

Publikováno v: Biochemistry. 43:13271-13282

The oxygen-evolving complex of photosystem II (PS II) in green plants and algae contains a cluster of four Mn atoms in the active site, which catalyzes the photoinduced oxidation of water to dioxygen. Along with Mn, calcium and chloride ions are nece

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db26af83e0008b74202a60d71f5087f7
https://doi.org/10.1021/bi036308v

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Chloride ligation in inorganic manganese model compounds relevant to Photosystem II studied using X-ray absorption spectroscopy

Autor: Sumitra Mukhopadhyay, John H. Robblee, Samudranil Pal, Hendrik Visser, Shelly A. Pizarro, Roehl M. Cinco, William H. Armstrong, Vittal K. Yachandra, Henry J. Mok, Kenneth Sauer, Karl Wieghardt

Publikováno v: JBIC Journal of Biological Inorganic Chemistry. 9:247-255

Chloride ions are essential for proper function of the photosynthetic oxygen-evolving complex (OEC) of Photosystem II (PS II). Although proposed to be directly ligated to the Mn cluster of the OEC, the specific structural and mechanistic roles of chl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5ffc2491b32825e6785635a405fda61
https://doi.org/10.1007/s00775-003-0520-1

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Acarological risk of exposure to agents of tick-borne zoonoses in the first recognized Italian focus of Lyme borreliosis

Autor: Alessandro Mannelli, S Stefanelli, Elena Grego, Daniele De Meneghi, G. Boggiatto, R. Murgia, Sergio Rosati, M. Cinco

Publikováno v: Epidemiology and Infection. 131:1139-1147

Acarological risk was calculated as the probability of encountering at least one host-seeking Ixodes ricinus tick infected by the pathogen Borrelia burgdorferi sensu lato, in 100 m transects in the province of Genoa, Italy. The seasonal pattern of I.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::21ce737ae71c1c01a122fa7acba52a7c
https://doi.org/10.1017/s0950268803001328

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New Triterpene Glycosides from the Stems of Anomospermum grandifolium

Autor: Aurelia Tubaro, Cosimo Pizza, Sonia Piacente, M. Cinco, Alberto Plaza

Publikováno v: Journal of Natural Products. 66:1606-1610

Two new dammarane saponins identified as jujubogenin 3-O-alpha-l-arabinofuranosyl(1-->2)-[beta-d-glucopyranosyl(1-->6) beta-d-glucopyranosyl(1-->3)]-alpha-l-arabinopyranoside (2) and jujubogenin 3-O-alpha-l-arabinofuranosyl(1-->2)-[6-O-[3-hydroxy-3-m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac762e3641642897de606493b563175c
https://doi.org/10.1021/np030283j

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The Mn Cluster in the S0 State of the Oxygen-Evolving Complex of Photosystem II Studied by EXAFS Spectroscopy: Are There Three Di-μ-oxo-bridged Mn2 Moieties in the Tetranuclear Mn Complex?

Autor: Carmen Fernandez, Karen L. McFarlane, Shelly A. Pizarro, Roehl M. Cinco, Kenneth Sauer, Johannes Messinger, John H. Robblee, Vittal K. Yachandra

Publikováno v: Journal of the American Chemical Society. 124:7459-7471

A key component required for an understanding of the mechanism of the evolution of molecular oxygen by the photosynthetic oxygen-evolving complex (OEC) in photosystem II (PS II) is the knowledge of the structures of the Mn cluster in the OEC in each

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c974a8abc6d27c847ae82b359859adf
https://doi.org/10.1021/ja011621a

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Absence of Mn-Centered Oxidation in the S2 → S3 Transition: Implications for the Mechanism of Photosynthetic Water Oxidation

Autor: Carmen Fernandez, Shelly A. Pizarro, Johannes Messinger, John H. Robblee, Stephen P. Cramer, Emanuele Bellacchio, Kenneth Sauer, Hendrik Visser, Roehl M. Cinco, Melvin P. Klein, Uwe Bergmann, Karen L. McFarlane, Vittal K. Yachandra, Pieter Glatzel

Publikováno v: Journal of the American Chemical Society. 123:7804-7820

A key question for the understanding of photosynthetic water oxidation is whether the four oxidizing equivalents necessary to oxidize water to dioxygen are accumulated on the four Mn ions of the oxygen-evolving complex (OEC), or whether some ligand-c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c402b35d349b0674cfef432e06988284
https://doi.org/10.1021/ja004307+

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High-resolution X-ray spectroscopy of rare events: a different look at local structure and chemistry

Autor: Melvin P. Klein, Emanuele Bellacchio, Billie L. Cox, Kenneth Sauer, Kenneth H. Nealson, Stephen P. Cramer, Uwe Bergmann, John H. Robblee, Johannes Messinger, Pieter Glatzel, Carmen Fernandez, Karen L. McFarlane, Roehl M. Cinco, Vittal K. Yachandra, Shelly A. Pizarro, Henk Visser

Publikováno v: Journal of Synchrotron Radiation. 8:199-203

The combination of large-acceptance high-resolution X-ray optics with bright synchrotron sources permits quantitative analysis of rare events such as X-ray fluorescence from very dilute systems, weak fluorescence transitions or X-ray Raman scattering

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a60dca983d2d2b27e122e2e1db5608a6
https://doi.org/10.1107/s0909049500016484

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X-ray spectroscopy-based structure of the Mn cluster and mechanism of photosynthetic oxygen evolution

Autor: Vittal K. Yachandra, Roehl M. Cinco, John H. Robblee

Publikováno v: Biochimica et Biophysica Acta (BBA) - Bioenergetics. 1503:7-23

The mechanism by which the Mn-containing oxygen evolving complex (OEC) produces oxygen from water has been of great interest for over 40 years. This review focuses on how X-ray spectroscopy has provided important information about the structure of th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::30d0b2b6f6a1fd210a968c02f79c739b
https://doi.org/10.1016/s0005-2728(00)00217-6

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