Biochimica et Biophysica Acta (BBA) Bioenergetics This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Stoichiometry of protein complexes in plant photosynthetic membranes
Publication date: Available online 9 December 2019Source: Biochimica et Biophysica Acta (BBA) - BioenergeticsAuthor(s): Steven D. McKenzie, Iskander M. Ibrahim, Uma K. Aryal, Sujith PuthiyaveetilAbstractHetero-oligomeric membrane protein complexes form the electron transport chain (ETC) of oxygenic photosynthesis. The ETC complexes undertake the light-driven vectorial electron and proton transport reactions, which generate energy-rich ATP and electron-rich NADPH molecules for carbon fixation. The rate of photosynthetic electron transport depends on the availability of photons and the relative abundance of electron transpor...
Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - December 9, 2019 Category: Biochemistry Source Type: research

Bioenergetic consequences from xenotopic expression of a tunicate AOX in mouse mitochondria: Switch from RET and ROS to FET
Publication date: Available online 9 December 2019Source: Biochimica et Biophysica Acta (BBA) - BioenergeticsAuthor(s): Marten Szibor, Timur Gainutdinov, Erika Fernandez-Vizarra, Eric Dufour, Zemfira Gizatullina, Grazyna Debska-Vielhaber, Juliana Heidler, Ilka Wittig, Carlo Viscomi, Frank Gellerich, Anthony L. MooreAbstractElectron transfer from all respiratory chain dehydrogenases of the electron transport chain (ETC) converges at the level of the quinone (Q) pool. The Q redox state is thus a function of electron input (reduction) and output (oxidation) and closely reflects the mitochondrial respiratory state. Disruption ...
Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - December 9, 2019 Category: Biochemistry Source Type: research

Human erythrocytes exposure to juglone leads to an increase of superoxide anion production associated with cytochrome b5 reductase uncoupling
Publication date: Available online 9 December 2019Source: Biochimica et Biophysica Acta (BBA) - BioenergeticsAuthor(s): Gabriel N. Valério, Carlos Gutiérrez-Merino, Fatima Nogueira, Isabel Moura, José J.G. Moura, Alejandro K. Samhan-AriasAbstractCytochrome b5 reductase is an enzyme with the ability to generate superoxide anion at the expenses of NADH. Although this activity can be stimulated by cytochrome c and could participate in the bioenergetic failure accounting in apoptosis, very little is known about other molecules that may uncouple the function of the cytochrome b5 reductase. Naphthoquinones are redox active mo...
Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - December 9, 2019 Category: Biochemistry Source Type: research

On the nature of uncoupled chlorophylls in the extremophilic photosystem I-light harvesting I supercomplex
Publication date: Available online 9 December 2019Source: Biochimica et Biophysica Acta (BBA) - BioenergeticsAuthor(s): Sebastian Szewczyk, Mateusz Abram, Rafał Białek, Patrycja Haniewicz, Jerzy Karolczak, Jacek Gapiński, Joanna Kargul, Krzysztof GibasiewiczAbstractPhotosystem I core-light-harvesting antenna supercomplexes (PSI-LHCI) were isolated from the extremophilic red alga Cyanidioschyzon merolae and studied by three fluorescence techniques in order to characterize chlorophylls (Chls) energetically uncoupled from the PSI reaction center (RC). Such Chls are observed in virtually all optical experiments of any PSI c...
Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - December 9, 2019 Category: Biochemistry Source Type: research

The oligomeric state of the Caldivirga maquilingensis type III sulfide:Quinone Oxidoreductase is required for membrane binding
Publication date: Available online 6 December 2019Source: Biochimica et Biophysica Acta (BBA) - BioenergeticsAuthor(s): Andrea M. Lencina, Robert B. Gennis, Lici A. Schurig-BriccioAbstractSulfide:quinone oxidoreductase (SQR) is a monotopic membrane flavoprotein present in all domains of life, with multiple roles including sulfide detoxification, homeostasis and energy generation by providing electrons to respiratory or photosynthetic electron transport chains. A type III SQR from the hyperthermophilic archeon Caldivirga maquilingensis has been previously characterized, and its C-terminal amphipathic helices were demonstrat...
Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - December 7, 2019 Category: Biochemistry Source Type: research

Plasticity of photosynthetic processes and the accumulation of secondary metabolites in plants in response to monochromatic light environments: A review
Publication date: Available online 7 December 2019Source: Biochimica et Biophysica Acta (BBA) - BioenergeticsAuthor(s): Marco Landi, Marek Zivcak, Oksana Sytar, Marian Brestic, Suleyman I. AllakhverdievAbstractLight spectra significantly influence plant metabolism, growth and development. Here, we review the effects of monochromatic blue, red and green light compared to those of multispectral light sources on the morpho-anatomical, photosynthetic and molecular traits of herbaceous plants. Emphasis is given to the effect of light spectra on the accumulation of secondary metabolites, which are important bioactive phytochemic...
Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - December 7, 2019 Category: Biochemistry Source Type: research

Editorial Board
Publication date: 1 January 2020Source: Biochimica et Biophysica Acta (BBA) - Bioenergetics, Volume 1861, Issue 1Author(s): (Source: Biochimica et Biophysica Acta (BBA) Bioenergetics)
Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - December 4, 2019 Category: Biochemistry Source Type: research

The spatio-temporal organization of mitochondrial F1FO ATP synthase in cristae depends on its activity mode
Publication date: Available online 27 November 2019Source: Biochimica et Biophysica Acta (BBA) - BioenergeticsAuthor(s): Kirill Salewskij, Bettina Rieger, Frances Hager, Tasnim Arroum, Patrick Duwe, Jimmy Villalta, Sara Colgiati, Christian P. Richter, Olympia E. Psathaki, José A. Enriquez, Timo Dellmann, Karin B. BuschAbstractF1FO ATP synthase, also known as complex V, is a key enzyme of mitochondrial energy metabolism that can synthesize and hydrolyze ATP. It is not known whether the ATP synthase and ATPase function are correlated with a different spatio-temporal organisation of the enzyme. In order to analyze this, we t...
Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - November 28, 2019 Category: Biochemistry Source Type: research

The role of xanthophylls in the supramolecular organization of the photosynthetic complex LHCII in lipid membranes studied by high-resolution imaging and nanospectroscopy
Publication date: Available online 14 November 2019Source: Biochimica et Biophysica Acta (BBA) - BioenergeticsAuthor(s): Jiangtao Zhou, Sergey Sekatskii, Renata Welc, Giovani Dietler, Wieslaw I. GruszeckiAbstractThe xanthophyll cycle is a regulatory mechanism operating in the photosynthetic apparatus of plants. It consists of the conversion of the xanthophyll pigment violaxanthin to zeaxanthin, and vice versa, in response to light intensity. According to the current understanding, one of the modes of regulatory activity of the cycle is associated with the influence on a molecular organization of pigment-protein complexes. ...
Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - November 16, 2019 Category: Biochemistry Source Type: research

The oxidation-reduction and electrocatalytic properties of CO dehydrogenase from Oligotropha carboxidovorans
Publication date: Available online 14 November 2019Source: Biochimica et Biophysica Acta (BBA) - BioenergeticsAuthor(s): Palraj Kalimuthu, Mélanie Petitgenet, Dimitri Niks, Stephanie Dingwall, Jeffrey R. Harmer, Russ Hille, Paul V. BernhardtAbstractCO dehydrogenase (CODH) from the Gram-negative bacterium Oligotropha carboxidovorans is a complex metalloenzyme of the xanthine oxidase family of molybdenum-containing enzymes, bearing a unique bimolecular Mo-S-Cu active site in addition to two [2Fe-2S] clusters (FeSI and FeSII) and one equivalent of FAD. CODH catalyzes the oxidation of CO to CO2 with the concomitant introducti...
Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - November 15, 2019 Category: Biochemistry Source Type: research

Structural changes at the surface of cytochrome c oxidase alter the proton-pumping stoichiometry
Publication date: Available online 14 November 2019Source: Biochimica et Biophysica Acta (BBA) - BioenergeticsAuthor(s): Johan Berg, Jian Liu, Emelie Svahn, Shelagh Ferguson-Miller, Peter BrzezinskiAbstractData from earlier studies showed that minor structural changes at the surface of cytochrome c oxidase, near one of the proton-input pathways (the D pathway), result in dramatically decreased activity and a lower proton-pumping stoichiometry. To further investigate how changes around the D pathway orifice influence functionality of the enzyme, here we modified the nearby C-terminal loop of subunit I of the Rhodobacter sph...
Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - November 15, 2019 Category: Biochemistry Source Type: research

Instantaneous switching between different modes of non-photochemical quenching in plants. Consequences for increasing biomass production
Publication date: Available online 14 November 2019Source: Biochimica et Biophysica Acta (BBA) - BioenergeticsAuthor(s): Herbert van Amerongen, Jevgenij ChmeliovAbstractPhotosynthetic productivity usually saturates far below the maximum solar light intensity, meaning that in those conditions many absorbed photons and the resulting electronic excitations of the pigment molecules can no longer be utilized for photosynthesis. To avoid photodamage, various protection mechanisms are induced that dissipate excess excitations, which otherwise could lead to the formation of harmful molecular species like singlet oxygen. This Non-P...
Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - November 15, 2019 Category: Biochemistry Source Type: research

Comparative ultrafast spectroscopy and structural analysis of OCP1 and OCP2 from Tolypothrix
Publication date: Available online 14 November 2019Source: Biochimica et Biophysica Acta (BBA) - BioenergeticsAuthor(s): Valentyna Kuznetsova, Maria Agustina Dominguez-Martin, Han Bao, Sayan Gupta, Markus Sutter, Miroslav Kloz, Mateusz Rebarz, Martin Přeček, Yan Chen, Christopher J. Petzold, Corie Y. Ralston, Cheryl A. Kerfeld, Tomáš PolívkaAbstractThe orange carotenoid protein (OCP) is a structurally and functionally modular photoactive protein involved in cyanobacterial photoprotection. Recently, based on bioinformatic analysis and phylogenetic relationships, new families of OCP have been described, OCP2 and OCPx. T...
Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - November 15, 2019 Category: Biochemistry Source Type: research

Editorial Board
Publication date: 1 December 2019Source: Biochimica et Biophysica Acta (BBA) - Bioenergetics, Volume 1860, Issue 12Author(s): (Source: Biochimica et Biophysica Acta (BBA) Bioenergetics)
Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - November 12, 2019 Category: Biochemistry Source Type: research

Integrated thermodynamic analysis of electron bifurcating [FeFe]-hydrogenase to inform anaerobic metabolism and H2 production
Publication date: Available online 8 November 2019Source: Biochimica et Biophysica Acta (BBA) - BioenergeticsAuthor(s): Zackary J. Jay, Kristopher A. Hunt, Katherine J. Chou, Gerrit J. Schut, Pin-Ching Maness, Michael W.W. Adams, Ross P. CarlsonAbstractElectron bifurcating, [FeFe]-hydrogenases are recently described members of the hydrogenase family and catalyze a combination of exergonic and endergonic electron exchanges between three carriers (2 ferredoxinred− + NAD(P)H + 3 H+ = 2 ferredoxinox + NAD(P)+ + 2 H2). A thermodynamic analysis of the bifurcating, [FeFe]-hydrogenase reaction, using electr...
Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - November 9, 2019 Category: Biochemistry Source Type: research