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Knox PP, Lukashev EP, Gorokhov VV, Grishanova NP, Paschenko VZ. Hybrid complexes of photosynthetic reaction centers and quantum dots in various matrices: resistance to UV irradiation and heating. PHOTOSYNTHESIS RESEARCH 2019; 139:295-305. [PMID: 29948749 DOI: 10.1007/s11120-018-0529-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 06/05/2018] [Indexed: 06/08/2023]
Abstract
The effects of ultraviolet (UV) irradiation (up to 0.6 J/cm2) and heating (65 °C, 20 min) on the absorption spectra and electron transfer in dehydrated film samples of photosynthetic reaction centers (RCs) from purple bacterium Rhodobacter (Rb.) sphaeroides, as well as in hybrid structures consisting of RCs and quantum dots (QDs), have been studied. The samples were placed in organic matrices containing the stabilizers of protein structure-polyvinyl alcohol (PVA) and trehalose. UV irradiation led to partially irreversible oxidation of some RCs, as well as to transformation of some fraction of the bacteriochlorophyll (BChl) molecules into bacteriopheophytin (BPheo) molecules. In addition, UV irradiation causes degradation of some BChl molecules that is accompanied by formation of 3-acetyl-chlorophyll a molecules. Finally, UV irradiation destroys the RCs carotenoid molecules. The incorporation of RCs into organic matrices reduced pheophytinization. Trehalose was especially efficient in reducing the damage to the carotenoid and BChl molecules caused by UV irradiation. Hybrid films containing RC + QD were more stable to pheophytinization upon UV irradiation. However, the presence of QDs in films did not affect the processes of carotenoid destruction. The efficiency of the electronic excitation energy transfer from QD to P865 also did not change under UV irradiation. Heating led to dramatic destruction of the RCs structure and bacteriochlorins acquired the properties of unbound molecules. Trehalose provided strong protection against destruction of the RCs and hybrid (RC + QD) complexes.
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Affiliation(s)
- Peter P Knox
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Evgeny P Lukashev
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Vladimir V Gorokhov
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Nadezhda P Grishanova
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Vladimir Z Paschenko
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia, 119991.
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Fahad S, Bajwa AA, Nazir U, Anjum SA, Farooq A, Zohaib A, Sadia S, Nasim W, Adkins S, Saud S, Ihsan MZ, Alharby H, Wu C, Wang D, Huang J. Crop Production under Drought and Heat Stress: Plant Responses and Management Options. FRONTIERS IN PLANT SCIENCE 2017; 8:1147. [PMID: 28706531 PMCID: PMC5489704 DOI: 10.3389/fpls.2017.01147] [Citation(s) in RCA: 727] [Impact Index Per Article: 103.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 06/15/2017] [Indexed: 05/18/2023]
Abstract
Abiotic stresses are one of the major constraints to crop production and food security worldwide. The situation has aggravated due to the drastic and rapid changes in global climate. Heat and drought are undoubtedly the two most important stresses having huge impact on growth and productivity of the crops. It is very important to understand the physiological, biochemical, and ecological interventions related to these stresses for better management. A wide range of plant responses to these stresses could be generalized into morphological, physiological, and biochemical responses. Interestingly, this review provides a detailed account of plant responses to heat and drought stresses with special focus on highlighting the commonalities and differences. Crop growth and yields are negatively affected by sub-optimal water supply and abnormal temperatures due to physical damages, physiological disruptions, and biochemical changes. Both these stresses have multi-lateral impacts and therefore, complex in mechanistic action. A better understanding of plant responses to these stresses has pragmatic implication for remedies and management. A comprehensive account of conventional as well as modern approaches to deal with heat and drought stresses have also been presented here. A side-by-side critical discussion on salient responses and management strategies for these two important abiotic stresses provides a unique insight into the phenomena. A holistic approach taking into account the different management options to deal with heat and drought stress simultaneously could be a win-win approach in future.
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Affiliation(s)
- Shah Fahad
- National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System, College of Plant Science and Technology, Huazhong Agricultural UniversityWuhan, China
| | - Ali A. Bajwa
- School of Agriculture and Food Sciences, The University of Queensland, GattonQLD, Australia
| | - Usman Nazir
- Department of Agronomy, University of AgricultureFaisalabad, Pakistan
| | - Shakeel A. Anjum
- Department of Agronomy, University of AgricultureFaisalabad, Pakistan
| | - Ayesha Farooq
- Department of Agronomy, University of AgricultureFaisalabad, Pakistan
| | - Ali Zohaib
- Department of Agronomy, University of AgricultureFaisalabad, Pakistan
| | - Sehrish Sadia
- College of Life Sciences, Beijing Normal UniversityBeijing, China
| | - Wajid Nasim
- Department of Environmental Sciences, COMSATS Institute of Information TechnologyVehari, Pakistan
| | - Steve Adkins
- School of Agriculture and Food Sciences, The University of Queensland, GattonQLD, Australia
| | - Shah Saud
- College of Horticulture, Northeast Agricultural University HarbinHarbin, China
- Royal Wellington Golf ClubUpper Hutt, New Zealand
| | - Muhammad Z. Ihsan
- Cholistan Institute of Desert Studied, The Islamia University of BahawalpurBahawalpur, Pakistan
- Department of Agronomy, The Islamia University of BahawalpurBahawalpur, Pakistan
| | - Hesham Alharby
- Department of Biological Sciences, Faculty of Science, King Abdulaziz UniversityJeddah, Saudi Arabia
| | - Chao Wu
- National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System, College of Plant Science and Technology, Huazhong Agricultural UniversityWuhan, China
| | - Depeng Wang
- College of Life Science, Linyi UniversityLinyi, China
| | - Jianliang Huang
- National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System, College of Plant Science and Technology, Huazhong Agricultural UniversityWuhan, China
- Hubei Collaborative Innovation Center for Grain Industry, Yangtze UniversityWuhan, China
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Shubin VV, Terekhova IV, Bolychevtseva YV, El-Mohsnawy E, Rögner M, Mäntele W, Kopczak MJ, Džafić E. Thermostability of photosystem I trimers and monomers from the cyanobacterium Thermosynechococcus elongatus. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 179:17-22. [PMID: 28213141 DOI: 10.1016/j.saa.2017.02.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 01/30/2017] [Accepted: 02/04/2017] [Indexed: 06/06/2023]
Abstract
The performance of solar energy conversion into alternative energy sources in artificial systems highly depends on the thermostability of photosystem I (PSI) complexes Terasaki et al. (2007), Iwuchukwu et al. (2010), Kothe et al. (2013) . To assess the thermostability of PSI complexes from the thermophilic cyanobacterium Thermosynechococcus elongatus heating induced perturbations on the level of secondary structure of the proteins were studied. Changes were monitored by Fourier transform infrared (FT-IR) spectra in the mid-IR region upon slow heating (1°C per minute) of samples in D2O phosphate buffer (pD 7.4) from 20°C to 100°C. These spectra showed distinct changes in the Amide I region of PSI complexes as a function of the rising temperature. Absorbance at the Amide I maximum of PSI monomers (centered around 1653cm-1), gradually dropped in two temperature intervals, i.e. 60-75 and 80-90°C. In contrast, absorbance at the Amide I maximum of PSI trimers (around 1656cm-1) dropped only in one temperature interval 80-95°C. The thermal profile of the spectral shift of α-helices bands in the region 1656-1642cm-1 confirms the same two temperature intervals for PSI monomers and only one interval for trimers. Apparently, the observed absorbance changes at the Amide I maximum during heating of PSI monomers and trimers are caused by deformation and unfolding of α-helices. The absence of absorbance changes in the interval of 20-65°C in PSI trimers is probably caused by a greater stability of protein secondary structure as compared to that in monomers. Upon heating above 80°C a large part of α-helices both in trimers and monomers converts to unordered and aggregated structures. Spectral changes of PSI trimers and monomers heated up to 100°C are irreversible due to protein denaturation and non-specific aggregation of complexes leading to new absorption bands at 1618-1620cm-1. We propose that monomers shield the denaturation sensitive sides at the monomer/monomer interface within a trimer, making the oligomeric structure more stable against thermal stress.
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Affiliation(s)
- Vladimir V Shubin
- Baсh Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 33, bld.2, Leninsky Ave., Moscow 119071, Russia
| | - Irina V Terekhova
- Baсh Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 33, bld.2, Leninsky Ave., Moscow 119071, Russia.
| | - Yulia V Bolychevtseva
- Baсh Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 33, bld.2, Leninsky Ave., Moscow 119071, Russia
| | - Eithar El-Mohsnawy
- Biochemie der Pflanzen, Ruhr Universität Bochum, 44780 Bochum, Germany; Botany Department, Faculty of Science, Kafrelsheikh University, 33511 Kafrelsheikh, Egypt
| | - Matthias Rögner
- Biochemie der Pflanzen, Ruhr Universität Bochum, 44780 Bochum, Germany
| | - Werner Mäntele
- Institut für Biophysik, J.W. Goethe Universität Frankfurt, 60438 Frankfurt, Germany
| | - Marta J Kopczak
- Biochemie der Pflanzen, Ruhr Universität Bochum, 44780 Bochum, Germany
| | - Enela Džafić
- Institut für Biophysik, J.W. Goethe Universität Frankfurt, 60438 Frankfurt, Germany
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Karlický V, Kurasová I, Ptáčková B, Večeřová K, Urban O, Špunda V. Enhanced thermal stability of the thylakoid membranes from spruce. A comparison with selected angiosperms. PHOTOSYNTHESIS RESEARCH 2016; 130:357-371. [PMID: 27154572 DOI: 10.1007/s11120-016-0269-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 04/25/2016] [Indexed: 06/05/2023]
Abstract
Recently, we have found that thermal stability of photosystem II (PSII) photochemistry in spruce needles is higher than in other plants (barley, beech) cultivated under the same temperatures. In this work, temperature dependences of various characteristics of PSII organization were studied in order to obtain complex information on the thermal stability of PSII function and organization in spruce. Temperature dependency of circular dichroism spectra revealed by about 6 °C higher thermal stability of macrodomain organization in spruce thylakoid membranes in comparison with Arabidopsis and barley ones; however, thermal disintegration of light-harvesting complex of PSII did not significantly differ among the species studied. These results thus indicate that thermal stability of PSII macro-organization in spruce thylakoid membranes is enhanced to a similar extent as thermal stability of PSII photochemistry. Clear-native polyacrylamide gel electrophoresis of preheated thylakoids demonstrated that among the separated pigment-protein complexes, only PSII supercomplexes (SCs) revealed considerably higher thermal stability in spruce thylakoids as compared to Arabidopsis and barley ones. Hence we suggest that higher thermal stability of PSII macro-organization of spruce is influenced by the maintenance of PSII SCs in the thylakoid membrane. In addition, we discuss possible effects of different PSII organizations and lipid compositions on the thermal stability of spruce thylakoid membranes.
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Affiliation(s)
- Václav Karlický
- Faculty of Science, Ostrava University, 30. dubna 22, 701 03, Ostrava 1, Czech Republic.
- Global Change Research Institute CAS, Bělidla 986/4a, 603 00, Brno, Czech Republic.
| | - Irena Kurasová
- Faculty of Science, Ostrava University, 30. dubna 22, 701 03, Ostrava 1, Czech Republic
- Global Change Research Institute CAS, Bělidla 986/4a, 603 00, Brno, Czech Republic
| | - Božena Ptáčková
- Faculty of Science, Ostrava University, 30. dubna 22, 701 03, Ostrava 1, Czech Republic
| | - Kristýna Večeřová
- Global Change Research Institute CAS, Bělidla 986/4a, 603 00, Brno, Czech Republic
| | - Otmar Urban
- Global Change Research Institute CAS, Bělidla 986/4a, 603 00, Brno, Czech Republic
| | - Vladimír Špunda
- Faculty of Science, Ostrava University, 30. dubna 22, 701 03, Ostrava 1, Czech Republic
- Global Change Research Institute CAS, Bělidla 986/4a, 603 00, Brno, Czech Republic
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Hasni I, Yaakoubi H, Hamdani S, Tajmir-Riahi HA, Carpentier R. Mechanism of interaction of Al3+ with the proteins composition of photosystem II. PLoS One 2015; 10:e0120876. [PMID: 25806795 PMCID: PMC4373732 DOI: 10.1371/journal.pone.0120876] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 01/27/2015] [Indexed: 11/29/2022] Open
Abstract
The inhibitory effect of Al3+on photosystem II (PSII) electron transport was investigated using several biophysical and biochemical techniques such as oxygen evolution, chlorophyll fluorescence induction and emission, SDS-polyacrylamide and native green gel electrophoresis, and FTIR spectroscopy. In order to understand the mechanism of its inhibitory action, we have analyzed the interaction of this toxic cation with proteins subunits of PSII submembrane fractions isolated from spinach. Our results show that Al 3+, especially above 3 mM, strongly inhibits oxygen evolution and affects the advancement of the S states of the Mn4O5Ca cluster. This inhibition was due to the release of the extrinsic polypeptides and the disorganization of the Mn4O5Ca cluster associated with the oxygen evolving complex (OEC) of PSII. This fact was accompanied by a significant decline of maximum quantum yield of PSII (Fv/Fm) together with a strong damping of the chlorophyll a fluorescence induction. The energy transfer from light harvesting antenna to reaction centers of PSII was impaired following the alteration of the light harvesting complex of photosystem II (LHCII). The latter result was revealed by the drop of chlorophyll fluorescence emission spectra at low temperature (77 K), increase of F0 and confirmed by the native green gel electrophoresis. FTIR measurements indicated that the interaction of Al 3+ with the intrinsic and extrinsic polypeptides of PSII induces major alterations of the protein secondary structure leading to conformational changes. This was reflected by a major reduction of α-helix with an increase of β-sheet and random coil structures in Al 3+-PSII complexes. These structural changes are closely related with the functional alteration of PSII activity revealed by the inhibition of the electron transport chain of PSII.
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Affiliation(s)
- Imed Hasni
- Research Group in Plant Biology, Department of Chemistry, Biochemistry and Physics, University of Quebec at Trois-Rivieres, Trois-Rivieres, Quebec, Canada
| | - Hnia Yaakoubi
- Research Group in Plant Biology, Department of Chemistry, Biochemistry and Physics, University of Quebec at Trois-Rivieres, Trois-Rivieres, Quebec, Canada
| | - Saber Hamdani
- Plant Systems Biology Group, Partner Institute of Computational Biology, Chinese Academy of Sciences, Shanghai, China
| | - Heidar-Ali Tajmir-Riahi
- Research Group in Plant Biology, Department of Chemistry, Biochemistry and Physics, University of Quebec at Trois-Rivieres, Trois-Rivieres, Quebec, Canada
| | - Robert Carpentier
- Research Group in Plant Biology, Department of Chemistry, Biochemistry and Physics, University of Quebec at Trois-Rivieres, Trois-Rivieres, Quebec, Canada
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Tian F, Gong J, Zhang J, Feng Y, Wang G, Guo Q, Wang W. Overexpression of monoubiquitin improves photosynthesis in transgenic tobacco plants following high temperature stress. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2014; 226:92-100. [PMID: 25113454 DOI: 10.1016/j.plantsci.2014.03.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 02/10/2014] [Accepted: 03/01/2014] [Indexed: 05/11/2023]
Abstract
The ubiquitin/26S proteasome system (Ub/26S) is implicated in abiotic stress responses in plants. In this paper, transgenic tobacco plants overexpressing Ta-Ub2 from wheat were used to study the functions of Ub in the improvement of photosynthesis under high temperature (45°C) stress. We observed higher levels of Ub conjugates in transgenic plants under high temperature stress conditions compared to wild type (WT) as a result of the constitutive overexpression of Ta-Ub2, suggesting increased protein degradation by the 26S proteasome system under high temperature stress. Overexpressing Ub increased the photosynthetic rate (Pn) of transgenic tobacco plants, consistent with the improved ATPase activity in the thylakoid membrane and enhanced efficiency of PSII photochemistry. The higher D1 protein levels following high temperature stress in transgenic plants than WT were also observed. These findings imply that Ub may be involved in tolerance of photosynthesis to high temperature stress in plants. Compared with WT, the transgenic plants showed lower protein carbonylation and malondialdehyde (MDA) levels, less reactive oxygen species (ROS) accumulation, but higher antioxidant enzyme activity under high temperature stress. These findings suggest that the improved antioxidant capacity of transgenic plants may be one of the most important mechanisms underlying Ub-regulated high temperature tolerance.
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Affiliation(s)
- Fengxia Tian
- State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 61 Daizong Street, Tai'an 271018, China; College of Life Science and Technology, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, China
| | - Jiangfeng Gong
- State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 61 Daizong Street, Tai'an 271018, China
| | - Jin Zhang
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, 8 Xiangshan Road, Beijing 100091, China
| | - Yanan Feng
- State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 61 Daizong Street, Tai'an 271018, China
| | - Guokun Wang
- State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 61 Daizong Street, Tai'an 271018, China
| | - Qifang Guo
- State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 61 Daizong Street, Tai'an 271018, China
| | - Wei Wang
- State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 61 Daizong Street, Tai'an 271018, China.
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Pobeguts OV, Smolova TN, Klimov VV. Bicarbonate stabilizes isolated D1/D2/cytochrome b559 complex of photosystem 2 against thermoinactivation. BIOCHEMISTRY. BIOKHIMIIA 2012; 77:171-9. [PMID: 22348477 DOI: 10.1134/s0006297912020083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
It has been shown that thermoinactivation of the isolated D1/D2/cytochrome b(559) complex (RC) of photosystem 2 (PS-2) from pea under anaerobic conditions at 35°C in 20 mM Tris-HCl buffer (pH 7.2) depleted of HCO(3)(-), with 35 mM NaCl and 0.05% n-dodecyl-β-maltoside, results in a decrease in photochemical activity measured by photoreduction of the PS-2 primary electron acceptor, pheophytin (by 50% after 3 min of heating), which is accompanied by aggregation of the D1 and D2 proteins. Bicarbonate, formate, and acetate anions added to the sample under these conditions differently influence the maintenance of photochemical activity: a 50% loss of photochemical activity occurs in 11.5 min of heating in the presence of bicarbonate and in 4 and 4.6 min in the presence of formate and acetate, respectively. The addition of bicarbonate completely prevents aggregation of the D1 and D2 proteins as opposed to formate and acetate (their presence has no effect on the aggregation during thermoinactivation). Since the isolated RCs have neither inorganic Mn/Ca-containing core of the water-oxidizing complex nor nonheme Fe(2+), it is supposed that bicarbonate specifically interacts with the hydrophilic domains of the D1 and D2 proteins, which prevents their structural modification that is a signal for aggregation of these proteins and the loss of photochemical activity.
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Affiliation(s)
- O V Pobeguts
- Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region, Russia.
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The extrinsic proteins of Photosystem II. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2011; 1817:121-42. [PMID: 21801710 DOI: 10.1016/j.bbabio.2011.07.006] [Citation(s) in RCA: 190] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Revised: 07/11/2011] [Accepted: 07/12/2011] [Indexed: 02/08/2023]
Abstract
In this review we examine the structure and function of the extrinsic proteins of Photosystem II. These proteins include PsbO, present in all oxygenic organisms, the PsbP and PsbQ proteins, which are found in higher plants and eukaryotic algae, and the PsbU, PsbV, CyanoQ, and CyanoP proteins, which are found in the cyanobacteria. These proteins serve to optimize oxygen evolution at physiological calcium and chloride concentrations. They also shield the Mn(4)CaO(5) cluster from exogenous reductants. Numerous biochemical, genetic and structural studies have been used to probe the structure and function of these proteins within the photosystem. We will discuss the most recent proposed functional roles for these components, their structures (as deduced from biochemical and X-ray crystallographic studies) and the locations of their proposed binding domains within the Photosystem II complex. This article is part of a Special Issue entitled: Photosystem II.
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Nellaepalli S, Mekala NR, Zsiros O, Mohanty P, Subramanyam R. Moderate heat stress induces state transitions in Arabidopsis thaliana. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2011; 1807:1177-84. [PMID: 21640068 DOI: 10.1016/j.bbabio.2011.05.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Revised: 05/17/2011] [Accepted: 05/18/2011] [Indexed: 11/29/2022]
Abstract
The effect of temperature on the photosynthetic machinery is crucial for the fundamental understanding of plant physiology and the bioengineering of heat-tolerant varieties. In our study, Arabidopsis thaliana was exposed to mild (40°C), short-term heat stress in the dark to evaluate the heat-triggered phosphorylation and migration of light harvesting complex (LHC) II in both wild-type (wt) and mutant lacking STN7 kinase. The 77K emission spectra revealed an increase in PSI relative to PSII emission similar to increases observed in light-induced state I to state II transitions in wt but not in stn7 mutant. Immunoblotting results indicated that the major LHCII was phosphorylated at threonine sites under heat stress in wt plants but not in the mutant. These results support the proposition that mild heat stress triggers state transitions in the dark similar to light-induced state transitions, which involve phosphorylation of LHCII by STN7 kinase. Pre-treatment of Arabidopsis leaves with inhibitor DBMIB, altered the extent of LHCII phosphorylation and PSI fluorescence emission suggests that activation of STN7 kinase may be dependent on Cyt b(6)/f under elevated temperatures in dark. Furthermore, fast Chl a transient of temperature-exposed leaves of wt showed a decrease in the F(v)/F(m) ratio due to both an increase in F(o) and a decrease in F(m). In summary, our findings indicate that a mild heat treatment (40°C) induces state transitions in the dark resulting in the migration of phosphorylated LHCII from the grana to the stroma region.
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Affiliation(s)
- Sreedhar Nellaepalli
- Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad 500046, India
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Tóth SZ, Nagy V, Puthur JT, Kovács L, Garab G. The physiological role of ascorbate as photosystem II electron donor: protection against photoinactivation in heat-stressed leaves. PLANT PHYSIOLOGY 2011; 156:382-92. [PMID: 21357184 PMCID: PMC3091034 DOI: 10.1104/pp.110.171918] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Accepted: 02/27/2011] [Indexed: 05/18/2023]
Abstract
Previously, we showed that ascorbate (Asc), by donating electrons to photosystem II (PSII), supports a sustained electron transport activity in leaves in which the oxygen-evolving complexes were inactivated with a heat pulse (49°C, 40 s). Here, by using wild-type, Asc-overproducing, and -deficient Arabidopsis (Arabidopsis thaliana) mutants (miox4 and vtc2-3, respectively), we investigated the physiological role of Asc as PSII electron donor in heat-stressed leaves (40°C, 15 min), lacking active oxygen-evolving complexes. Chlorophyll-a fluorescence transients show that in leaves excited with trains of saturating single-turnover flashes spaced 200 ms apart, allowing continual electron donation from Asc to PSII, the reaction centers remained functional even after thousands of turnovers. Higher flash frequencies or continuous illumination (300 μmol photons m(-2) s(-1)) gradually inactivated them, a process that appeared to be initiated by a dramatic deceleration of the electron transfer from Tyr(Z) to P680(+), followed by the complete loss of charge separation activity. These processes occurred with half-times of 1.2 and 10 min, 2.8 and 23 min, and 4.1 and 51 min in vtc2-3, the wild type, and miox4, respectively, indicating that the rate of inactivation strongly depended on the Asc content of the leaves. The recovery of PSII activity, following the degradation of PSII proteins (D1, CP43, and PsbO), in moderate light (100 μmol photons m(-2) s(-1), comparable to growth light), was also retarded in the Asc-deficient mutant. These data show that high Asc content of leaves contributes significantly to the ability of plants to withstand heat-stress conditions.
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Affiliation(s)
- Szilvia Z Tóth
- Institute of Plant Biology, Biological Research Center Szeged, Hungarian Academy of Sciences, H-6701 Szeged, Hungary.
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Joly D, Govindachary S, Fragata M. Photosystem II reconstitution into proteoliposomes and methodologies for structure-function characterization. Methods Mol Biol 2011; 684:217-45. [PMID: 20960133 DOI: 10.1007/978-1-60761-925-3_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This chapter discusses the photosystem II (PSII) reconstitution into proteoliposomes. In the first part of the chapter, protocols are outlined for the preparation of lipid bilayer vesicles (liposomes) constituted of individual thylakoid lipids or their mixtures, for the preparation of PSII particles, and for the incorporation of the PSII particles into the liposomes. In the second part of the chapter, methodologies are described for the structure-function characterization of the PSII-lipid complexes (proteoliposomes). This includes the sodium dodecylsulfate-polyacrylamide gel electrophoresis determination of the PSII proteins, the measurement of oxygen-evolving activity of PSII in the proteoliposomes, the study of structural changes of the PSII proteins upon their incorporation into the lipid bilayers by Fourier transform infrared (FT-IR) spectroscopy, and the characterization of the PSII activity by fluorescence induction.
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Affiliation(s)
- David Joly
- Département de chimie biologie (GRBV), Université du Québec à Trois-Rivières, Trois-Rivières, QC, Canada
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Yang ZL, Wang ZN, Li LB, Kuang TY. Oxygen-evolving Activity in Photosystem II Core Complex of Photosynthetic Membrane in the Presence of Native Lipid. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20020200611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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13
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Functional and molecular properties of calcium precipitated soy glycinin and the effect of glycation with κ-carrageenan. Food Res Int 2010. [DOI: 10.1016/j.foodres.2010.04.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Wang LJ, Fan L, Loescher W, Duan W, Liu GJ, Cheng JS, Luo HB, Li SH. Salicylic acid alleviates decreases in photosynthesis under heat stress and accelerates recovery in grapevine leaves. BMC PLANT BIOLOGY 2010; 10:34. [PMID: 20178597 PMCID: PMC2848757 DOI: 10.1186/1471-2229-10-34] [Citation(s) in RCA: 106] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2009] [Accepted: 02/23/2010] [Indexed: 05/17/2023]
Abstract
BACKGROUND Although the effect of salicylic acid (SA) on photosynthesis of plants including grapevines has been investigated, very little is yet known about the effects of SA on carbon assimilation and several components of PSII electron transport (donor side, reaction center and acceptor side). In this study, the impact of SA pretreatment on photosynthesis was evaluated in the leaves of young grapevines before heat stress (25 degrees C), during heat stress (43 degrees C for 5 h), and through the following recovery period (25 degrees C). Photosynthetic measures included gas exchange parameters, PSII electron transport, energy dissipation, and Rubisco activation state. The levels of heat shock proteins (HSPs) in the chloroplast were also investigated. RESULTS SA did not significantly (P < 0.05) influence the net photosynthesis rate (Pn) of leaves before heat stress. But, SA did alleviate declines in Pn and Rubisco activation state, and did not alter negative changes in PSII parameters (donor side, acceptor side and reaction center QA) under heat stress. Following heat treatment, the recovery of Pn in SA-treated leaves was accelerated compared with the control (H2O-treated) leaves, and, donor and acceptor parameters of PSII in SA-treated leaves recovered to normal levels more rapidly than in the controls. Rubisco, however, was not significantly (P < 0.05) influenced by SA. Before heat stress, SA did not affect level of HSP 21, but the HSP21 immune signal increased in both SA-treated and control leaves during heat stress. During the recovery period, HSP21 levels remained high through the end of the experiment in the SA-treated leaves, but decreased in controls. CONCLUSION SA pretreatment alleviated the heat stress induced decrease in Pn mainly through maintaining higher Rubisco activation state, and it accelerated the recovery of Pn mainly through effects on PSII function. These effects of SA may be related in part to enhanced levels of HSP21.
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Affiliation(s)
- Li-Jun Wang
- Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, PR China
| | - Ling Fan
- Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, PR China
- College of Agriculture and Biology Technology, China Agricultural University, Beijing 100093, PR China
| | - Wayne Loescher
- College of Agriculture and Natural Resources, Michigan State University, East Lansing, 48824, MI, USA
| | - Wei Duan
- Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, PR China
| | - Guo-Jie Liu
- College of Agriculture and Biology Technology, China Agricultural University, Beijing 100093, PR China
| | - Jian-Shan Cheng
- Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, PR China
| | - Hai-Bo Luo
- Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, PR China
| | - Shao-Hua Li
- Key Laboratory of Pant Germplasm Enhancement and Speciality Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, PR China
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15
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Heat-induced disassembly and degradation of chlorophyll-containing protein complexes in vivo. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2010; 1797:63-70. [DOI: 10.1016/j.bbabio.2009.08.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2009] [Revised: 08/12/2009] [Accepted: 08/18/2009] [Indexed: 11/19/2022]
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16
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Fragata M, Viruvuru V. Temperature Dependence of Oxygen Evolution in the Thylakoid Membrane: Thermal Transitions above 273 K in Steady-State Conditions. J Phys Chem B 2009; 113:15392-8. [DOI: 10.1021/jp9071586] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mário Fragata
- Département de Chimie-Biologie, Section de Chimie et Biochimie, et Groupe de Recherche en Biologie Végétale, Université du Québec à Trois-Rivières, Trois-Rivières (Québec), G9A5H7, Canada
| | - Venkataramanaiah Viruvuru
- Département de Chimie-Biologie, Section de Chimie et Biochimie, et Groupe de Recherche en Biologie Végétale, Université du Québec à Trois-Rivières, Trois-Rivières (Québec), G9A5H7, Canada
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17
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Qu Y, Chen H, Qin X, Li L, Wang L, Kuang T. Thermal denaturation of CP43 studied by Fourier transform-infrared spectroscopy and terahertz time-domain spectroscopy. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2007; 1774:1614-8. [DOI: 10.1016/j.bbapap.2007.08.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2007] [Revised: 08/26/2007] [Accepted: 08/28/2007] [Indexed: 11/25/2022]
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18
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Sánchez-Bautista S, Kazaks A, Beaulande M, Torrecillas A, Corbalán-García S, Gómez-Fernández JC. Structural study of the catalytic domain of PKCzeta using infrared spectroscopy and two-dimensional infrared correlation spectroscopy. FEBS J 2006; 273:3273-86. [PMID: 16792700 DOI: 10.1111/j.1742-4658.2006.05338.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The secondary structure of the catalytic domain from protein kinase C zeta was studied using IR spectroscopy. In the presence of the substrate MgATP, there was a significant change in the secondary structure. After heating to 80 degrees C, a 14% decrease in the alpha-helix component was observed, accompanied by a 6% decrease in the beta-pleated sheet; no change was observed in the large loops or in 3(10)-helix plus associated loops. The maximum increase with heating was observed in the aggregated beta-sheet component, with an increase of 14%. In the presence of MgATP, and compared with the sample heated in its absence, there was a substantial decrease in the 3(10)-helix plus associated loops and an increase in alpha-helix. Synchronous 2D-IR correlation showed that the main changes occurred at 1617 cm(-1), which was assigned to changes in the intermolecular aggregated beta-sheet of the denaturated protein. This increase was mainly correlated with the change in alpha-helix. In the presence of MgATP, the main correlation was between aggregated beta-sheet and the large loops component. The asynchronous 2D-correlation spectrum indicated that a number of components are transformed in intermolecularly aggregated beta-sheet, especially the alpha-helix and beta-sheet components. It is interesting that changes in 3(10)-helix plus associated loops and in alpha-helix preceded changes in large loops, which suggests that the open loops structure exists as an intermediate state during denaturation. In summary, IR spectroscopy revealed an important effect of MgATP on the secondary structure and on the thermal unfolding process when this was induced, whereas 2D-IR correlation spectroscopy allowed us to show the establishment of the denaturation pathway of this protein.
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19
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Yoshioka M, Uchida S, Mori H, Komayama K, Ohira S, Morita N, Nakanishi T, Yamamoto Y. Quality control of photosystem II. Cleavage of reaction center D1 protein in spinach thylakoids by FtsH protease under moderate heat stress. J Biol Chem 2006; 281:21660-21669. [PMID: 16735503 DOI: 10.1074/jbc.m602896200] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
When spinach thylakoids were subjected to moderate heat stress (40 degrees C for 30 min), oxygen evolution was inhibited, and cleavage of the reaction center-binding protein D1 of photosystem II took place, producing 23-kDa N-terminal fragments. The D1 cleavage was greatly facilitated by the addition of 0.15 mM ZnCl2 and 1 mM ATP and was completely inhibited by 1 mM EDTA, indicating the participation of an ATP-dependent metalloprotease(s) in the D1 cleavage. Herbicides 3-(3,4-dichlorophenyl)-1,1-dimethyl urea, bromoxynil, and ioxynil, all of which bind to the Q(B) site, inhibited the D1 cleavage, suggesting that the DE-loop of the D1 protein is the heat-sensitive cleavage site. We solubilized the protease by treating the thylakoids with 2 M KSCN and detected a protease activity in the supernatant by gelatin activity gel electrophoresis in the 70-80-kDa region. The antibodies against tobacco FtsH and Arabidopsis FtsH2 reacted with a 70-80-kDa band of the KSCN-solubilized fraction, which suggests the presence of FtsH in the fraction. In accordance with this finding, we identified the homolog to Arabidopsis FtsH8 in the 70-80-kDa region by matrix-assisted laser desorption ionization time-of-flight mass analysis of the thylakoids. The KSCN-solubilized fraction was successively reconstituted with thylakoids to show heat-induced cleavage of the D1 protein and production of the D1 fragment. These results strongly suggest that an FtsH protease(s) is involved in the primary cleavage of the D1 protein under moderate heat stress.
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Affiliation(s)
- Miho Yoshioka
- Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530
| | - Suguru Uchida
- Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530
| | - Hiroki Mori
- School of Pharmacy, Shujitsu University, Okayama 703-8516, Japan
| | - Keisuke Komayama
- Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530
| | - Satoshi Ohira
- Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530
| | - Noriko Morita
- Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530
| | - Tohru Nakanishi
- School of Pharmacy, Shujitsu University, Okayama 703-8516, Japan
| | - Yasusi Yamamoto
- Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530.
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20
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Tóth SZ, Schansker G, Kissimon J, Kovács L, Garab G, Strasser RJ. Biophysical studies of photosystem II-related recovery processes after a heat pulse in barley seedlings (Hordeum vulgare L.). JOURNAL OF PLANT PHYSIOLOGY 2005; 162:181-94. [PMID: 15779828 DOI: 10.1016/j.jplph.2004.06.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Leaves of 7-day-old barley seedlings were subjected to heat pulses at 50 degrees C for 20 or 40s to inhibit partially or fully the oxygen evolution without inducing visible symptoms. By means of biophysical techniques, we investigated the time course and mechanism of photosystem II (PSII) recovery. After the heat treatment, the samples were characterized by typical heat stress symptoms: loss of oxygen evolution activity, strong decrease of Fv/Fm, induction of the K-step in the fluorescence induction transient, emergence of the AT-thermoluminescence-band and a dramatic increase in membrane permeability. In the first 4h in the light following the heat pulse, the AT-band and the K-step disappeared in parallel, indicating the loss of this restricted activity of PSII. This phase was followed by a recovery period, during which PSII-activity was gradually restored in the light. In darkness, no recovery, except for the membrane permeability, was observed. A model is presented that accounts for (i) the damage induced by the heat pulse on the membrane architecture and on the PSII donor side, (ii) the light-dependent removal of the impaired reaction centers from the disorganized membrane, and (iii) the subsequent light-independent restoration of the membrane permeability and the de novo synthesis of the PSII reaction centers in the light.
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Affiliation(s)
- Szilvia Z Tóth
- Laboratory of Bioenergetics, University of Geneva, Chemin des Embrouchis 10, CH-1254 Jussy, Switzerland.
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21
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Vass E, Hollósi M, Besson F, Buchet R. Vibrational spectroscopic detection of beta- and gamma-turns in synthetic and natural peptides and proteins. Chem Rev 2003; 103:1917-54. [PMID: 12744696 DOI: 10.1021/cr000100n] [Citation(s) in RCA: 246] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Elemér Vass
- Department of Organic Chemistry, Eötvös Loránd University, H-1518 Budapest 112, P.O. Box 32, Hungary
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22
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Lee J, Macosko CW, Urry DW. Elastomeric polypentapeptides cross-linked into matrixes and fibers. Biomacromolecules 2002; 2:170-9. [PMID: 11749169 DOI: 10.1021/bm0000900] [Citation(s) in RCA: 101] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Microbially prepared polypentapeptides were cross-linked by two chemical methods. In one chemical approach, (GVGIP)(260) where G = glycine, V = valine, I = isoleucine, and P = proline with no functional groups in its side chains, was cross-linked using dicumyl peroxide, and reaction conditions were systematically examined. Successful cross-linking was obtained even under severe conditions for proteins, i.e., 3 h at 120 degrees C, without having significant side reactions. In the second chemical approach, two separate polymers, (GVGVP GVGVP GXGVP GVGVP GVGVP GVGVP)(n) where X is either E (the carboxylic acid containing glutamic acid residue) or K (the lysine residue with an epsilon-amino function), were mixed and cross-linked using a carbodiimde reagent. The reaction temperature was found to affect the equilibrium swelling behavior of the resulting cross-linked hydrogels. In hydrogels cross-linked at a temperature above their hydrophobic folding and assembling transition temperature, 3D continuous filamentous microstructures were observed. Chemically cross-linked hydrogel fibers were also prepared and their anisotropy in swelling was confirmed. Uniaxial tensile moduli and equilibrium weight swelling ratios of the chemically cross-linked samples were compared to those of (GVGVP)(251) and (GVGIP)(260), gamma-irradiation cross-linked at different Mrad doses.
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Affiliation(s)
- J Lee
- Chemical Engineering and Materials Science, The University of Minnesota, Minneapolis, Minnesota 55455, USA.
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23
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Costa ES, Bressan-Smith R, Oliveira JGD, Campostrini E, Pimentel C. Photochemical efficiency in bean plants (Phaseolus vulgaris L. and Vigna unguiculata L. Walp) during recovery from high temperature stress. ACTA ACUST UNITED AC 2002. [DOI: 10.1590/s1677-04202002000200004] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Bean (Phaseolus vulgaris L., cv. Carioca and cv. Negro Huasteco) and cowpea plants (Vigna unguiculata L. Walp cv. Epace 10) were grown in a growth chamber with PPF at leaf level of 200 mumol.m-2.s-1 and air temperature 25 + 1 ºC. The first fully expanded pair of leaves of 12-day-old plants was submitted to high temperature stress (25, 30, 35, 40, 45 and 48 ºC) for 1.5 h. The photochemical efficiency of PSII during recovery was monitored by means of chlorophyll a fluorescence at six different times (0.5, 1, 2, 4, 24, and 48 h) after stress, at 25 ºC, using a modulated fluorimeter. Increasing temperature promoted an increase in Fphi at 45 ºC, possibly associated with dissociation of the light harvesting complex from the reaction centre of PSII, but a decrease was observed at 48 ºC in all cultivars. Fmax decreased at 48 ºC in Carioca and Negro Huasteco, but not in Epace 10, showing a possible correlation between heat tolerance and Fmax for this cultivar. The low values of Fmax in Carioca and Negro Huasteco indicated a loss of PSII activity followed by death of these plants. Fv/Fmax did not vary in Epace 10 but varied in Carioca and Negro Huasteco with increasing temperatures.
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24
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Ruan X, Wei J, Xu Q, Wang JS, Gong YD, Zhang XF, Kuang TY, Zhao NM. Comparison of the effects of Triton X-100 treatment on the protein secondary structure of Photosystem I and Photosystem II studied by FT-IR spectroscopy. J Mol Struct 2000. [DOI: 10.1016/s0022-2860(00)00422-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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25
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Ségui JA, Maire V, Gabashvili IS, Fragata M. Oxygen evolution loss and structural transitions in photosystem II induced by low intensity UV-B radiation of 280 nm wavelength. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2000; 56:39-47. [PMID: 11073314 DOI: 10.1016/s1011-1344(00)00057-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
UV-B radiation of 280 nm wavelength (UV280) and low intensity (2.0 W/m2) gives rise to an important oxygen evolution (OE) loss in photosystem II (PSII) particles isolated from the thylakoid membrane of plant chloroplasts on the one hand, and to structural changes, or transitions, in the proteins of the PSII complex on the other hand. The latter UV280 effect was studied in this work by Fourier transform infrared (FT-IR) spectroscopy. First, irradiation of the PSII particles with UV280 for about 40 min causes an almost complete loss of OE activity. The remaining OE after 15, 20, 30 and 40 min is respectively 52, 44, 27 and 12% of the OE activity in control PSH particles kept in darkness. Secondly, difference FT-IR spectra of PSII particles irradiated for 30 min, i.e., [PSII irradiated with UV280]-minus-[PSII non-irradiated], show that the UV280 light is at the origin of significant IR absorbance changes in several spectral regions: (i) amide I (1696-1620 cm(-1)) and amide II (1580-1520 cm(-1)), (ii) tyrosine side chain (1620-1580 cm(-1) and 1520-1500 cm(-1), i.e., the v8a, v8b and v19a vibrational modes, respectively), and (iii) chlorophylls (1750-1696 cm(-1)). Thirdly, comparison of the UV-B effect reported here with structural changes induced by heat-stress in PSII proteins [M. Joshi, M. Fragata, Z. Naturforsch. 54c (1999) 35-43] clearly indicates that the stability of the functional centers in the PSII complex is dependent on a dynamic equilibrium between a-helix conformers and extended chain (beta-strand) structures. In this framework, transient 'alpha-helix-to-beta-strand transitions' are susceptible of giving rise in vivo to recurrent changes in the activity of the PSII complex, and as such act as a control mechanism of the photosynthetic function in the thylakoid membrane.
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Affiliation(s)
- J A Ségui
- Université du Québec à Trois-Rivières, Département de Chimie et Biologie, Trois-Rivieres, Canada
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26
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Arrondo JL, Goñi FM. Structure and dynamics of membrane proteins as studied by infrared spectroscopy. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 1999; 72:367-405. [PMID: 10605294 DOI: 10.1016/s0079-6107(99)00007-3] [Citation(s) in RCA: 322] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Infrared (IR) spectroscopy is a useful technique in the study of protein conformation and dynamics. The possibilities of the technique become apparent specially when applied to large proteins in turbid suspensions, as is often the case with membrane proteins. The present review describes the applications of IR spectroscopy to the study of membrane proteins, with an emphasis on recent work and on spectra recorded in the transmission mode, rather than using reflectance techniques. Data treatment procedures are discussed, including band analysis and difference spectroscopy methods. A technique for the analysis of protein secondary and tertiary structures that combines band analysis by curve-fitting of original spectra with protein thermal denaturation is described in detail. The assignment of IR protein bands in H2O and in D2O, one of the more difficult points in protein IR spectroscopy, is also reviewed, including some cases of unclear assignments such as loops, beta-hairpins, or 3(10)-helices. The review includes monographic studies of some membrane proteins whose structure and function have been analysed in detail by IR spectroscopy. Special emphasis has been made on the role of subunit III in cytochrome c oxidase structure, and the proton pathways across this molecule, on the topology and functional cycle of sarcoplasmic reticulum Ca(2+)-ATPase, and on the role of lipids in determining the structure of the nicotinic acetylcholine receptor. In addition, shorter descriptions of retinal proteins and references to other membrane proteins that have been studied less extensively are also included.
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Affiliation(s)
- J L Arrondo
- Unidad de Biofísica (Centro Mixto CSIC-UPV/EHU), Bilbao, Spain.
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27
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Zhang H, Yamamoto Y, Ishikawa Y, Carpentier R. Characterization of the secondary structure and thermostability of the extrinsic 16 kilodalton protein of spinach photosystem II by Fourier transform infrared spectroscopy. J Mol Struct 1999. [DOI: 10.1016/s0022-2860(99)00107-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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28
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Larive CK, Lunte SM, Zhong M, Perkins MD, Wilson GS, Gokulrangan G, Williams T, Afroz F, Schöneich C, Derrick TS, Middaugh CR, Bogdanowich-Knipp S. Separation and analysis of peptides and proteins. Anal Chem 1999; 71:389R-423R. [PMID: 10409086 DOI: 10.1021/a1990013o] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C K Larive
- Department of Chemistry, University of Kansas, Lawrence, Kansas 66045
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29
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Wang J, Shan J, Xu Q, Ruan X, Gong Y, Kuang T, Zhao N. Light- and heat-induced denaturation of photosystem II core-antenna complexes CP43 and CP47. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B: BIOLOGY 1999. [DOI: 10.1016/s1011-1344(99)00091-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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30
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Čajánek M, Štroch M, Lachetová I, Kalina J, Spunda V. Characterization of the photosystem II inactivation of heat-stressed barley leaves as monitored by the various parameters of chlorophyll a fluorescence and delayed fluorescence. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 1998. [DOI: 10.1016/s1011-1344(98)00197-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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31
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Affiliation(s)
- D H Stewart
- Department of Chemistry, Yale University, New Haven, CT 06520-8107, USA
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32
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Gall B, Zehetner A, Scherz A, Scheer H. Modification of pigment composition in the isolated reaction center of photosystem II. FEBS Lett 1998; 434:88-92. [PMID: 9738457 DOI: 10.1016/s0014-5793(98)00956-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The pigment content of isolated reaction centers of photosystem II was modified using an exchange protocol similar to that used for purple bacterial reaction centers. With this method, which is based on incubation of reaction centers at elevated temperature with an excess of chemically modified pigments, it was possible to incorporate [3-acetyl]-chlorophyll a and [Zn]-chlorophyll a into photosystem II reaction centers. Pigment exchange has been verified by absorption, circular dichroism and fluorescence spectroscopy, and quantitated by HPLC analysis of pigment extracts.
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Affiliation(s)
- B Gall
- Botanisches Institut der Universität München, Munich, Germany
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33
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Zhang H, Ishikawa Y, Yamamoto Y, Carpentier R. Secondary structure and thermal stability of the extrinsic 23 kDa protein of photosystem II studied by Fourier transform infrared spectroscopy. FEBS Lett 1998; 426:347-51. [PMID: 9600264 DOI: 10.1016/s0014-5793(98)00371-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The secondary structure and thermal stability of the extrinsic 23 kDa protein (OEC23) of spinach photosystem II have been characterized in solution between 25 and 75 degrees C using Fourier transform infrared spectroscopy. Quantitative analysis of the amide I band (1700-1600 cm(-1)) shows that OEC23 contains 5% alpha-helix, 37% beta-sheet, 24% turn, and 34% disorder structures at 25 degrees C. No appreciable conformational changes occur below 45 degrees C. At elevated temperatures, the beta-sheet structure is unfolded into the disorder structure with a major conformational transition occurring at 55 degrees C. Implications of these results for the functions of OEC23 in photosystem II are discussed.
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Affiliation(s)
- H Zhang
- Groupe de Recherche en Energie et Information Biomoléculaires, Université du Québec à Trois-Rivières, Canada
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34
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Affiliation(s)
- Marianne L. McKelvy
- Analytical Sciences Laboratory, The Dow Chemical Company, U.S.A., Midland, Michigan 48667, and Applied Extrusion Technologies, 15 Reads Way, Newcastle, Delaware 19720
| | - Thomas R. Britt
- Analytical Sciences Laboratory, The Dow Chemical Company, U.S.A., Midland, Michigan 48667, and Applied Extrusion Technologies, 15 Reads Way, Newcastle, Delaware 19720
| | - Bradley L. Davis
- Analytical Sciences Laboratory, The Dow Chemical Company, U.S.A., Midland, Michigan 48667, and Applied Extrusion Technologies, 15 Reads Way, Newcastle, Delaware 19720
| | - J. Kevin Gillie
- Analytical Sciences Laboratory, The Dow Chemical Company, U.S.A., Midland, Michigan 48667, and Applied Extrusion Technologies, 15 Reads Way, Newcastle, Delaware 19720
| | - Felicia B. Graves
- Analytical Sciences Laboratory, The Dow Chemical Company, U.S.A., Midland, Michigan 48667, and Applied Extrusion Technologies, 15 Reads Way, Newcastle, Delaware 19720
| | - L. Alice Lentz
- Analytical Sciences Laboratory, The Dow Chemical Company, U.S.A., Midland, Michigan 48667, and Applied Extrusion Technologies, 15 Reads Way, Newcastle, Delaware 19720
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35
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Protein secondary structure and conformational changes of photosystem II during heat denaturation studied by Fourier transform-infrared spectroscopy. J Mol Struct 1998. [DOI: 10.1016/s0022-2860(98)00287-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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