Výsledky vyhledávání - "L. N. Davletshina"

Physiological Role of pH-Dependent Structural Transition in Oxygen-Evolving Complex of PSII

Autor: B. K. Semin, L. N. Davletshina, A. V. Loktyushkin, E. R. Lovyagina

Publikováno v: Russian Journal of Plant Physiology. 70

Abstract Photosystem II (PSII) of the photosynthetic apparatus in oxygenic organisms contains a catalytic center that performs one of the most important reactions in bioenergetics: light-dependent water oxidation to molecular oxygen. The catalytic ce

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8e62b184278726e4782bd5dcfd17a626
https://doi.org/10.1134/s1021443722700017

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Ca2+ effects on Fe(II) interactions with Mn-binding sites in Mn-depleted oxygen-evolving complexes of photosystem II and on Fe replacement of Mn in Mn-containing, Ca-depleted complexes

Autor: B К Semin, L. N. Davletshina, S. N. Goryachev, Michael Seibert

Publikováno v: Photosynthesis Research. 147:229-237

Fe(II) cations bind with high efficiency and specificity at the high-affinity (HA), Mn-binding site (termed the “blocking effect” since Fe blocks further electron donation to the site) of the oxygen-evolving complex (OEC) in Mn-depleted, photosys

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6e7ed85f2a5e407abf7b5538cdc65505
https://doi.org/10.1007/s11120-020-00813-z

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pH dependence of photosystem II photoinhibition: relationship with structural transition of oxygen-evolving complex at the pH of thylakoid lumen

Autor: L. N. Davletshina, Boris K. Semin

Publikováno v: Photosynthesis Research. 145:135-143

Ca-depleted photosystem II membranes (PSII[-Ca]) do not contain PsbP and PsbQ proteins protecting the Mn4CaO5 cluster of the PSII oxygen-evolving complex (OEC). Therefore, the Mn ions in the PSII(-Ca) membranes can be reduced by exogenous bulky reduc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65535ad4be8a18f725df071be566e85d
https://doi.org/10.1007/s11120-020-00769-0

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Effect of sucrose-bound polynuclear iron oxyhydroxide nanoparticles on the efficiency of electron transport in the photosystem II membranes

Autor: B К Semin, Andrei B. Rubin, L. N. Davletshina

Publikováno v: Photosynthesis Research. 142:57-67

Effect of water-soluble and stable sucrose-bound iron oxyhydroxide nanoparticles [Fe[III] sucrose complex (FSC)] on the efficiency of electron transport in the photosystem II membranes was studied. FSC significantly increases (by a factor 1.5) the ra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c266b28aedc0146938f5340a2d60a11d
https://doi.org/10.1007/s11120-019-00647-4

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Fluorescence Induction Kinetics in Membrane Preparations of Photosystem II with Heterogeneous Metal Clusters (Mn/Fe) in the Oxygen-Evolving Complex

Autor: L. N. Davletshina, Boris K. Semin

Publikováno v: Moscow University Biological Sciences Bulletin. 73:113-117

Transport of electrons in spinach photosystem II (PSII) whose oxygen-evolving complex (OEC) contains heterogeneous metal clusters 2Mn2Fe and 3Mn1Fe was studied by measuring the fluorescence induction kinetics (FIK). PSII(2Mn,2Fe) and PSII(3Mn,1Fe) pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3b2ceb67342486ac60070d94432395f1
https://doi.org/10.3103/s0096392518030057

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Creation of a 3Mn/1Fe cluster in the oxygen-evolving complex of photosystem II and investigation of its functional activity

Autor: Boris K. Semin, Michael Seibert, Andrei B. Rubin, L. N. Davletshina

Publikováno v: Journal of Photochemistry and Photobiology B: Biology. 178:192-200

Extraction of Mn cations from the oxygen-evolving complex (OEC) of Ca-depleted PSII membranes (PSII[-Ca,4Mn]) by reductants like hydroquinone (H2Q) occurs with lower efficiency at acidic pH (2Mn/reaction center [RC] are extracted at pH5.7) than at ne

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3d182081ffc5507c7f22ede1be4ae17
https://doi.org/10.1016/j.jphotobiol.2017.11.016

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Effect of different methods of Ca2+ extraction from PSII oxygen-evolving complex on the QA − oxidation kinetics

Autor: Mahir D. Mamedov, L. N. Davletshina, Boris K. Semin

Publikováno v: Photosynthesis Research. 136:83-91

Lumenal extrinsic proteins PsbO, PsbP, and PsbQ of photosystem II (PSII) protect the catalytic cluster Mn4CaO5 of oxygen-evolving complex (OEC) from the bulk solution and from soluble compounds in the surrounding medium. Extraction of PsbP and PsbQ p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6ecdb17ef14cb49b40eeb62b6cba3b31
https://doi.org/10.1007/s11120-017-0441-4

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The extrinsic PsbO protein modulates the oxidation/reduction rate of the exogenous Mn cation at the high-affinity Mn-binding site of Mn-depleted PSII membranes

Autor: I. I. Ivanov, Tatiana E. Podkovirina, Andrei B. Rubin, Boris K. Semin, L. N. Davletshina, K. N. Timofeev

Publikováno v: Journal of Bioenergetics and Biomembranes. 47:361-367

The oxidation of exogenous Mn(II) cations at the high-affinity (HA) Mn-binding site in Mn-depleted photosystem II (PSII) membranes with or without the presence of the extrinsic PsbO polypeptide was studied by EPR. The six-lines EPR spectrum of Mn(II)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5952eacb07395656d2d50e32f5246a9a
https://doi.org/10.1007/s10863-015-9618-8

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Production of reactive oxygen species in decoupled, Ca2+-depleted PSII and their use in assigning a function to chloride on both sides of PSII

Autor: Michael Seibert, K. N. Timofeev, I. I. Ivanov, Andrei B. Rubin, L. N. Davletshina, Boris K. Semin

Publikováno v: Photosynthesis Research. 117:385-399

Extraction of Ca(2+) from the oxygen-evolving complex of photosystem II (PSII) in the absence of a chelator inhibits O2 evolution without significant inhibition of the light-dependent reduction of the exogenous electron acceptor, 2,6-dichlorophenolin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::571f429e39d8f127e9935e0f4547e395
https://doi.org/10.1007/s11120-013-9870-x

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