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Boussac A, Sellés J, Hamon M, Sugiura M. Properties of Photosystem II lacking the PsbJ subunit. PHOTOSYNTHESIS RESEARCH 2022; 152:347-361. [PMID: 34661808 DOI: 10.1007/s11120-021-00880-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
Photosystem II (PSII), the oxygen-evolving enzyme, consists of 17 trans-membrane and 3 extrinsic membrane proteins. Other subunits bind to PSII during assembly, like Psb27, Psb28, and Tsl0063. The presence of Psb27 has been proposed (Zabret et al. in Nat Plants 7:524-538, 2021; Huang et al. Proc Natl Acad Sci USA 118:e2018053118, 2021; Xiao et al. in Nat Plants 7:1132-1142, 2021) to prevent the binding of PsbJ, a single transmembrane α-helix close to the quinone QB binding site. Consequently, a PSII rid of Psb27, Psb28, and Tsl0034 prior to the binding of PsbJ would logically correspond to an assembly intermediate. The present work describes experiments aiming at further characterizing such a ∆PsbJ-PSII, purified from the thermophilic Thermosynechococcus elongatus, by means of MALDI-TOF spectroscopy, thermoluminescence, EPR spectroscopy, and UV-visible time-resolved spectroscopy. In the purified ∆PsbJ-PSII, an active Mn4CaO5 cluster is present in 60-70% of the centers. In these centers, although the forward electron transfer seems not affected, the Em of the QB/QB- couple increases by ≥ 120 mV , thus disfavoring the electron coming back on QA. The increase of the energy gap between QA/QA- and QB/QB- could contribute in a protection against the charge recombination between the donor side and QB-, identified at the origin of photoinhibition under low light (Keren et al. in Proc Natl Acad Sci USA 94:1579-1584, 1997), and possibly during the slow photoactivation process.
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Affiliation(s)
- Alain Boussac
- I2BC, UMR CNRS 9198, CEA Saclay, 91191, Gif-sur-Yvette, France.
| | - Julien Sellés
- Institut de Biologie Physico-Chimique, UMR CNRS 7141 and Sorbonne Université, 13 rue Pierre et Marie Curie, 75005, Paris, France
| | - Marion Hamon
- Institut de Biologie Physico-Chimique, UMR8226/FRC550 CNRS and Sorbonne-Université, 13 rue Pierre et Marie Curie, 75005, Paris, France
| | - Miwa Sugiura
- Proteo-Science Research Center, and Department of Chemistry, Graduate School of Science and Technology, Ehime University, Bunkyo-cho, Matsuyama, Ehime, 790-8577, Japan.
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Ortega JM, Roncel M. The afterglow photosynthetic luminescence. PHYSIOLOGIA PLANTARUM 2021; 171:268-276. [PMID: 33231323 DOI: 10.1111/ppl.13288] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/12/2020] [Accepted: 11/19/2020] [Indexed: 06/11/2023]
Abstract
The afterglow (AG) photosynthetic luminescence is a long-lived chlorophyll fluorescence emitted from PSII after the illumination of photosynthetic materials by FR or white light and placed in darkness. The AG emission corresponds to the fraction of PSII centers in the S2/3 QB non-radiative state immediately after pre-illumination, in which the arrival of an electron transferred from stroma along cyclic/chlororespiratory pathway(s) produces the S2/3 QB - radiative state that emits luminescence. This emission can be optimally recorded by a linear temperature gradient as sharp thermoluminescence (TL) band peaking at about 45°C. The AG emission recorded by TL technique has been proposed as a simple non-invasive tool to investigate the chloroplast energetic state and some of its metabolism processes as cyclic transport of electrons around PSI, chlororespiration or photorespiration. On the other hand, this emission has demonstrated to be a useful probe to study the effect of various stress conditions in photosynthetic materials.
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Affiliation(s)
- José M Ortega
- Instituto de Bioquímica Vegetal y Fotosíntesis, Centro de Investigaciones Científicas Isla de la Cartuja, Universidad de Sevilla-CSIC, Seville, Spain
| | - Mercedes Roncel
- Instituto de Bioquímica Vegetal y Fotosíntesis, Centro de Investigaciones Científicas Isla de la Cartuja, Universidad de Sevilla-CSIC, Seville, Spain
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Yanykin D, Sundyreva M, Khorobrykh A, Semenova G, Savchenko T. Functional characterization of the corticular photosynthetic apparatus in grapevine. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2020; 1861:148260. [PMID: 32679044 DOI: 10.1016/j.bbabio.2020.148260] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/21/2020] [Accepted: 07/06/2020] [Indexed: 11/13/2022]
Abstract
A comparative analysis of functional characteristics of the grapevine leaf photosynthetic apparatus (LPA) and corticular photosynthetic apparatus (CPA) in chlorenchyma tissues of first-year lignified vine was performed. Obtained results demonstrate significant differences between the functional properties of the CPA and the LPA. CPA contains an increased proportion (about 2/3) of QB-non-reducing centers of photosystem II (PSII) that is confirmed by elevated O-J phase in fluorescence kinetics, high PSIIβ content, and slower QA-• reoxidation. CPA and LPA use different strategies to utilize absorbed light energy and to protect itself against excessive light. CPA dissipates a significant proportion of absorbed light energy as heat (regulated and non-regulated dissipation), and only a smaller part of the excitation energy is used in the dark stages of photosynthesis. The rate constant of photoinhibition and fluorescence quenching due to photoinhibition in CPA is almost three times higher than in LPA, while high-energy state fluorescence quenching value is twice lower. The saturation of vine chlorenchyma tissue with water increases the CPA tolerance to photoinhibition and promotes the ability to restore the photosynthetic activity after photoinhibition. The electron microscopy analysis confirmed the presence of intact plastids in vine chlorenchyma tissue, the interior space of plastids is filled with large starch grains while bands of stacked thylakoid membranes are mainly localized on the periphery. Analyzes showed that corticular plastids are specialized organelles combining features of chloroplasts, amyloplasts and gerontoplasts. Distinct structural organization of photosynthetic membranes and microenvironment predetermine distinctive functional properties of CPA.
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Affiliation(s)
- D Yanykin
- Institute of Basic Biological Problems, FRC PSCBR RAS, Pushchino, Moscow Region 142290, Russia
| | - M Sundyreva
- Federal State Budgetary Scientific Institution North Caucasian Regional Research Institute of Horticulture and Viticulture, Krasnodar 350072, Russia
| | - A Khorobrykh
- Institute of Basic Biological Problems, FRC PSCBR RAS, Pushchino, Moscow Region 142290, Russia
| | - G Semenova
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Moscow Region, 142290, Russia
| | - T Savchenko
- Institute of Basic Biological Problems, FRC PSCBR RAS, Pushchino, Moscow Region 142290, Russia.
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Yotsova EK, Stefanov MA, Dobrikova AG, Apostolova EL. Different sensitivities of photosystem II in green algae and cyanobacteria to phenylurea and phenol-type herbicides: effect on electron donor side. ACTA ACUST UNITED AC 2017; 72:315-324. [PMID: 28258977 DOI: 10.1515/znc-2016-0089] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 02/05/2017] [Indexed: 11/15/2022]
Abstract
Abstract
The effects of short-term treatment with phenylurea (DCMU, isoproturon) and phenol-type (ioxynil) herbicides on the green alga Chlorella kessleri and the cyanobacterium Synechocystis salina with different organizations of photosystem II (PSII) were investigated using pulse amplitude modulated (PAM) chlorophyll fluorescence and photosynthetic oxygen evolution measured by polarographic oxygen electrodes (Clark-type and Joliot-type). The photosynthetic oxygen evolution showed stronger inhibition than the PSII photochemistry. The effects of the studied herbicides on both algal and cyanobacterial cells decreased in the following order: DCMU>isoproturon>ioxynil. Furthermore, we observed that the number of blocked PSII centers increased significantly after DCMU treatment (204–250 times) and slightly after ioxynil treatment (19–35 times) in comparison with the control cells. This study suggests that the herbicides affect not only the acceptor side but also the donor side of PSII by modifications of the Mn cluster of the oxygen-evolving complex. We propose that one of the reasons for the different PSII inhibitions caused by herbicides is their influence, in different extents, on the kinetic parameters of the oxygen-evolving reactions (the initial S0−S1 state distribution, the number of blocked centers SB, the turnover time of Si states, misses and double hits). The relationship between the herbicide-induced inhibition and the changes in the kinetic parameters is discussed.
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Affiliation(s)
- Ekaterina K Yotsova
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 21, Sofia 1113, Bulgaria
| | - Martin A Stefanov
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 21, Sofia 1113, Bulgaria
| | - Anelia G Dobrikova
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 21, Sofia 1113, Bulgaria
| | - Emilia L Apostolova
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 21, 1113 Sofia, Bulgaria, Tel: +359-2979-2621, Fax: +359-2971-2493
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Effects of formate binding on the quinone–iron electron acceptor complex of photosystem II. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2011; 1807:216-26. [DOI: 10.1016/j.bbabio.2010.10.019] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Revised: 10/01/2010] [Accepted: 10/25/2010] [Indexed: 11/21/2022]
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Superoxide oxidase and reductase activity of cytochrome b559 in photosystem II. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2009; 1787:985-94. [DOI: 10.1016/j.bbabio.2009.03.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Revised: 03/19/2009] [Accepted: 03/26/2009] [Indexed: 11/21/2022]
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Kaminskaya O, Shuvalov VA, Renger G. Two reaction pathways for transformation of high potential cytochrome b559 of PS II into the intermediate potential form. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2007; 1767:550-8. [PMID: 17400179 DOI: 10.1016/j.bbabio.2007.02.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2006] [Revised: 12/04/2006] [Accepted: 02/03/2007] [Indexed: 11/17/2022]
Abstract
This study describes an analysis of different treatments that influence the relative content and the midpoint potential of HP Cyt b559 in PS II membrane fragments from higher plants. Two basically different types of irreversible modification effects are distinguished: the HP form of Cyt b559 is either predominantly affected when the heme group is oxidized ("O-type" effects) or when it is reduced ("R-type" effects). Transformation of HP Cyt b559 to lower potential redox forms (IP and LP forms) by the "O-type" mechanism is induced by high pH and detergent treatments. In this case the effects consist of a gradual decrease in the relative content of HP Cyt b559 while its midpoint potential remains unaffected. Transformation of HP Cyt b559 via an "R-type" mechanism is caused by a number of exogenous compounds denoted L: herbicides, ADRY reagents and tetraphenylboron. These compounds are postulated to bind to the PS II complex at a quinone binding site designated as Q(C) which interacts with Cyt b559 and is clearly not the Q(B) site. Binding of compounds L to the Q(C) site when HP Cyt b559 is oxidized gives rise to a gradual decrease in the E(m) of HP Cyt b559 with increasing concentration of L (up to 10 K(ox)(L) values) while the relative content of HP Cyt b559 is unaffected. Higher concentrations of compounds L required for their binding to Q(C) site when HP Cyt b559 is reduced (described by K(red)(L)) induce a conversion of HP Cyt b559 to lower potential redox forms ("R-type" transformation). Two reaction pathways for transitions of Cyt b559 between the different protein conformations that are responsible for the HP and IP/LP redox forms are proposed and new insights into the functional regulation of Cyt b559 via the Q(C) site are discussed.
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Affiliation(s)
- Olga Kaminskaya
- Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region 142292, Russia
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8
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Evans M, Ford R. Evidence for two tightly bound iron-quinones in the electron acceptor complex of photosystem II. FEBS Lett 2001. [DOI: 10.1016/0014-5793(86)80179-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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9
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Renger G, Rutherford A, Völker M. Evidence for resistance of the microenvironment of the primary plastoquinone acceptor (QA
−
·Fe2+
) to mild trypsinization in PS II particles. FEBS Lett 2001. [DOI: 10.1016/0014-5793(85)80915-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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EPR measurements on the effects of bicarbonate and triazine resistance on the acceptor side of Photosystem II. FEBS Lett 2001. [DOI: 10.1016/0014-5793(84)80744-9] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Desai TS, Bhagwat AS, Mohanty P. Thermoluminescence investigations on the site of action of o-phthalaldehyde in photosynthetic electron transport. PHOTOSYNTHESIS RESEARCH 1996; 48:213-220. [PMID: 24271301 DOI: 10.1007/bf00041011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/1995] [Accepted: 02/07/1996] [Indexed: 06/02/2023]
Abstract
Glow curves from spinach leaf discs infiltrated with o-phthalaldehyde (OPA) show significant similarity to those obtained by DCMU treatment which is known to block the electron flow from QA, the stable acceptor of Photosystem II (PS II). In both the cases, the thermoluminescence (TL) peak II (Q band) was intensified significantly, whereas peaks III and IV (B band) were suppressed. Total TL yield of the glow curve remained constant even when the leaf discs were infiltrated with high concentrations of OPA (4 mM) or with DCMU (100 μM), indicating that even at these high concentrations no significant change in the number of species undergoing charge recombination in PS II occurred. However, studies with thylakoids revealed significant differences in the action of OPA and DCMU on PS II. Although OPA, at a certain concentration and time of incubation, reduced the B band intensity by about 50-70%, and completely abolished the detectable oxygen evolution, it still retained the TL flash yield pattern, and, thus, S state turnover. OPA is known to inhibit the oxidoreductase activity of in vitro Cyt b6/f (Bhagwat et al. (1993) Arch Biochem Biophys 304: 38-44). However, in the OPA treated thylakoids the extent of inhibition of O2 evolution was not reduced even in the presence of oxidized tetramethyl-p-phenylenediamine which accepts electrons from plastoquinol and feeds then directly to Photosystem I. This suggests that OPA inhibition is at a site prior to plastoquinone pool in the electron transport chain, in agreement with it being between QA and QB. However, an unusual feature of OPA inhibition is that even though all oxygen evolution was completely suppressed, a significant fraction of PS II centers were functional and turned over with the same periodicity of four in the absence of any added electron donor, an observation which appears to be similar to that reported by Wydrzynski (Wydrzynski et al. (1985) Biochim Biophys Acta 809: 125-136) with lauroylcholine chloride, a lipid analogue compound. The detailed chemistry of OPA inhibition remains to be studied. Since we dedicate this paper to William A. Arnold, discoverer of delayed light and TL in photosynthesis, we have also included in the Introduction, a brief history of how TL work was initiated at BARC (Bombay, India).
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Affiliation(s)
- T S Desai
- Molecular Biology and Agriculture Division, Bhabha Atomic Research Centre Trombay, 400 085, Bombay, India
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12
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Calera MR, Soto F, Sanchez P, Bye R, Hernandez-Bautista B, Anaya AL, Lotina-Hennsen B, Mata R. Biochemically active sesquiterpene lactones from Ratibida mexicana. PHYTOCHEMISTRY 1995; 40:419-425. [PMID: 7546556 DOI: 10.1016/0031-9422(95)00257-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Bioactivity-directed fractionation of the methanol extract of the roots of Ratibida mexicana resulted in the isolation of two bioactive sesquiterpene lactones, isoalloalantolactone and elema-1,3,11-trien-8,12-olide. Both compounds caused a significant inhibition of the radicle growth of Amaranthus hypochondriacus and Echinochloa crus-galli, exerted moderate cytotoxic activity against three different solid tumour cell lines and inhibited significantly the radial growth of three phytopathogenic fungi. Isoalloalantolactone also caused the inhibition of ATP synthesis, proton uptake and electron transport (basal, phosphorylating and uncoupled) from water to methylviologen, therefore acting as a Hill's reaction inhibitor. The lactone did not affect photosystem I but inhibited photosystem II. The site of inhibition of isoalloalantolactone is located in the span of P680 to QA redox enzymes because the uncoupled electron transport from water to silicomolybdate and, from DPC to DCIP are inhibited approximately to the same extent.
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Affiliation(s)
- M R Calera
- Facultad de Química, Universidad Nacional Autónoma de México, México, D.F
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13
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Binding of carboxylate anions at the non-heme Fe(II) of PS II. I. Effects on the Q−AFe2+ and QAFe3+ EPR spectra and the redox properties of the iron. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1994. [DOI: 10.1016/0005-2728(94)90044-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Petrouleas V, Deligiannakis Y, Diner B. Binding of carboxylate anions at the non-heme Fe(II) of PS II. II. Competition with bicarbonate and effects on the QAQB electron transfer rate. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1994. [DOI: 10.1016/0005-2728(94)90045-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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15
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Molecular Genetic Manipulation and Characterization of Mutant Photosynthetic Reaction Centers from Purple Nonsulfur Bacteria. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/s1569-2558(08)60398-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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16
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Demeter S, Goussias C, Bernát G, Kovács L, Petrouleas V. Participation of the g = 1.9 and g = 1.82 EPR forms of the semiquinone-iron complex, QA-.Fe2+ of photosystem II in the generation of the Q and C thermoluminescence bands, respectively. FEBS Lett 1993; 336:352-6. [PMID: 8262261 DOI: 10.1016/0014-5793(93)80836-j] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Following illumination at 200 K, the charge recombination reactions and the origin of the thermoluminescence (TL) bands appearing at about 0 degree C (Q band) and +50 degrees C (C band) in the glow curve were investigated by comparative TL and EPR measurements in DCMU-treated photosystem II particles. Decay half-time measurements carried out at -25 degrees C and +25 degrees C, respectively, suggest that the S2 state (multi-line signal) undergoes charge recombination with the g = 1.9 form of the semiquinone-iron complex, QA-.Fe2+, resulting in the appearance of the Q band, and that the g = 1.82 form of QA-.Fe2+ back-reacts with the oxidized tyrosine, YD+ (Signal IIs), accounting for the generation of the C band.
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Affiliation(s)
- S Demeter
- Institute of Plant Biology, Biological Research Center, Hungarian Academy of Sciences, Szeged
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17
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Koulougliotis D, Kostopoulos T, Petrouleas V, Diner BA. Evidence for CN− binding at the PS II non-heme Fe2+. Effects on the EPR signal for Q−AFe2+ and on QAQB electron transfer. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1993. [DOI: 10.1016/0005-2728(93)90053-i] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Debus RJ. The manganese and calcium ions of photosynthetic oxygen evolution. BIOCHIMICA ET BIOPHYSICA ACTA 1992; 1102:269-352. [PMID: 1390827 DOI: 10.1016/0005-2728(92)90133-m] [Citation(s) in RCA: 970] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- R J Debus
- Department of Biochemistry, University of California Riverside 92521-0129
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Kirilovsky DL, Boussac AG, van Mieghem FJ, Ducruet JM, Sétif PR, Yu JJ, Vermaas WF, Rutherford AW. Oxygen-evolving photosystem II preparation from wild type and photosystem II mutants of Synechocystis sp. PCC 6803. Biochemistry 1992; 31:2099-107. [PMID: 1311205 DOI: 10.1021/bi00122a030] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We present here a simple and rapid method which allows relatively large quantities of oxygen-evolving photosystem II- (PS-II-) enriched particles to be obtained from wild-type and mutants of the cyanobacterium Synechocystis 6803. This method is based on that of Burnap et al. [Burnap, R., Koike, H., Sotiropoulou, G., Sherman, L. A., & Inoue, Y. (1989) Photosynth. Res. 22, 123-130] but is modified so that the whole preparation, from cells to PS-II particles, is achieved in 10 h and involves only one purification step. The purified preparation exhibits a 5-6-fold increase of O2-evolution activity on a chlorophyll basis over the thylakoids. The ratio of PS-I to PS-II is about 0.14:1 in the preparation. The secondary quinone electron acceptor, QB, is present in this preparation as demonstrated by thermoluminescence studies. These PS-II particles are well-suited to spectroscopic studies as demonstrated by the range of EPR signals arising from components of PS-II that are easily detectable. Among the EPR signals presented are those from a formal S3-state, attributed to an oxidized amino acid interacting magnetically with the Mn complex in Ca(2+)-deficient PS-II particles, and from S2 modified by the replacement of Ca2+ by Sr2+. Neither of these signals has been previously reported in cyanobacteria. Their detection under these conditions indicates a similar lesion caused by Ca2+ depletion in both plants and cyanobacteria. The protocol has also been applied to mutants which have site-specific changes in PS-II. Data are presented on mutants having changes on the electron donor (Y160F) and electron acceptor (G215W) side of the D2 polypeptide.
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Affiliation(s)
- D L Kirilovsky
- Département de Biologie, URA CNRS 1290, Gif-sur-Yvette, France
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20
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van der Bolt F, Vermaas W. Photoinactivation of photosystem II as studied with site-directed D2 mutants of the cyanobacterium Synechocystis sp. PCC 6803. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1992. [DOI: 10.1016/s0005-2728(05)80343-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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21
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Hallahan BJ, Ruffle SV, Bowden SJ, Nugent JH. Identification and characterisation of EPR signals involving QB semiquinone in plant Photosystem II. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1991. [DOI: 10.1016/s0005-2728(05)80203-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Miller AF, Brudvig GW. A guide to electron paramagnetic resonance spectroscopy of Photosystem II membranes. BIOCHIMICA ET BIOPHYSICA ACTA 1991; 1056:1-18. [PMID: 1845842 DOI: 10.1016/s0005-2728(05)80067-2] [Citation(s) in RCA: 166] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
This guide is intended to aid in the detection and identification of paramagnetic species in Photosystem II membranes, by electron paramagnetic resonance spectroscopy. The spectral features and occurrence of each of the electron paramagnetic resonance signals from Photosystem II are discussed, in relation to the nature of the moiety giving rise to the signal and the role of that species in photosynthetic electron transport. Examples of most of the signals discussed are shown. The electron paramagnetic resonance signals produced by the cytochrome b6f and Photosystem I complexes, as well as the signals from other common contaminants, are also reviewed. Furthermore, references to seminal experiments on bacterial reaction centers are included. By reviewing both the spectroscopic and biochemical bases for the electron paramagnetic resonance signals of the cofactors that mediate photosynthetic electron transport, this paper provides an introduction to the use and interpretation of electron paramagnetic resonance spectroscopy in the study of Photosystem II.
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Affiliation(s)
- A F Miller
- Department of Biochemistry, Brandeis University, Waltham, MA 02254
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23
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Recent Advances in the Structure Analysis of Rhodopseudomonas viridis Reaction Center Mutants. ACTA ACUST UNITED AC 1990. [DOI: 10.1007/978-3-642-61297-8_20] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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Petrouleas V, Diner BA. Formation by NO of nitrosyl adducts of redox components of the Photosystem II reaction center. I. NO binds to the acceptor-side non-heme iron. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1990. [DOI: 10.1016/0005-2728(90)90224-r] [Citation(s) in RCA: 65] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Diner BA, Ries DF, Cohen BN, Metz JG. COOH-terminal processing of polypeptide D1 of the photosystem II reaction center of Scenedesmus obliquus is necessary for the assembly of the oxygen-evolving complex. J Biol Chem 1988. [DOI: 10.1016/s0021-9258(18)68403-0] [Citation(s) in RCA: 143] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Petrouleas V, Diner BA. Light-induced oxidation of the acceptor-side Fe(II) of Photosystem II by exogenous quinones acting through the QB binding site. I. Quinones, kinetics and pH-dependence. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1987. [DOI: 10.1016/0005-2728(87)90032-6] [Citation(s) in RCA: 86] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Warden JT, Csatorday K. On the mechanism of linolenic acid inhibition in Photosystem II. BIOCHIMICA ET BIOPHYSICA ACTA 1987; 890:215-23. [PMID: 2879567 DOI: 10.1016/0005-2728(87)90022-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Recent studies in our laboratory have reexamined the interaction of the unsaturated fatty acid, linolenic acid, with Photosystem II and have documented two principal regions of inhibition: one associated with the donor complex (Signal 2f or D1) to the reaction center, and the other located on the reducing side between pheophytin and Qa (Golbeck, J.H. and Warden, J.T. (1984) Biochim. Biophys. Acta 767, 263-271). A further characterization of fatty acid inhibition of secondary electron transport in Photosystem II at room and cryogenic temperatures is presented in this paper. These studies demonstrate that linolenic acid, and related fatty acid analogs, eliminate the transient absorption increase at 320 nm, attributed to Qa-; abolish the production, either chemically or photochemically, of the ESR signal (Q-Fe) associated with the bound quinone acceptor, Qa-; and prevent the photooxidation of Signal 2(1t)(D1) at cryogenic temperature. Linolenic-acid-treated samples are characterized by a high initial fluorescence yield (Fi) equivalent to the maximum level of fluorescence (Fmax); however, the spin-polarized triplet, associated with the reaction-center electron donor, P-680, is observed only in inhibited samples that have been prereduced with sodium dithionite. These results suggest the presence of an additional acceptor intermediate between pheophytin and Qa. The donor-assisted photoaccumulation of pheophytin anion in Photosystem II particles, as monitored by the decline of fluorescence yield, is inhibited by linolenic acid. Redox titrations of the fluorescence yield in control and inhibited preparations demonstrate that the midpoint potential for the primary acceptor for Photosystem II is insensitive to the fatty acid (Em approximately -583 mV) and thus indicate that primary photochemistry is functional during linolenic-acid inhibition. These data are consistent with the hypothesis that unsaturated fatty acids inhibit secondary electron transport in Photosystem II via displacement of endogenous quinone from quinone-binding peptides.
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Beijer C, Rutherford A. The iron-quinone acceptor complex in Rhodospirillum rubrum chromatophores studied by EPR. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1987. [DOI: 10.1016/0005-2728(87)90018-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Diner BA, Petrouleas V. Q400, the non-heme iron of the photosystem II iron-quinone complex. A spectroscopic probe of quinone and inhibitor binding to the reaction center. ACTA ACUST UNITED AC 1987. [DOI: 10.1016/s0304-4173(87)80010-1] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Effect of pH on the thermoluminescence of spinach chloroplasts in the presence and absence of Photosystem II inhibitors. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1986. [DOI: 10.1016/0005-2728(86)90134-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wydrzynski T, Renger G. On the interpretation of the NMR water-proton relaxivity of photosynthetic membrane samples: Ramifications in the use of EDTA. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1986. [DOI: 10.1016/0005-2728(86)90249-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Identification of Q400, a high-potential electron acceptor of Photosystem II, with the iron of the quinone-iron acceptor complex. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1986. [DOI: 10.1016/0005-2728(86)90033-2] [Citation(s) in RCA: 117] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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A second site for herbicide action in Photosystem II. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1985. [DOI: 10.1016/0005-2728(85)90012-x] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Orientation of EPR signals arising from components in Photosystem II membranes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1985. [DOI: 10.1016/0005-2728(85)90122-7] [Citation(s) in RCA: 109] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Evans M, Atkinson Y, Ford R. Redox characterisation of the Photosystem II electron acceptors. Evidence for two electron carriers between pheophytin and Q. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1985. [DOI: 10.1016/0005-2728(85)90102-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Mathis P, Rutherford A. Effect of phenolic herbicides on the oxygen-evolving side of Photosystem II. Formation of the carotenoid cation. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1984. [DOI: 10.1016/0005-2728(84)90190-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Rutherford A, Zimmermann J. A new EPR signal attributed to the primary plastosemiquinone acceptor in Photosystem II. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1984. [DOI: 10.1016/0005-2728(84)90092-6] [Citation(s) in RCA: 101] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Zimmermann J, Rutherford A. EPR studies of the oxygen-evolving enzyme of Photosystem II. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1984. [DOI: 10.1016/0005-2728(84)90091-4] [Citation(s) in RCA: 107] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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