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Sánchez-Baracaldo P, Bianchini G, Di Cesare A, Callieri C, Chrismas NAM. Insights Into the Evolution of Picocyanobacteria and Phycoerythrin Genes ( mpeBA and cpeBA). Front Microbiol 2019; 10:45. [PMID: 30761097 PMCID: PMC6363710 DOI: 10.3389/fmicb.2019.00045] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 01/11/2019] [Indexed: 11/13/2022] Open
Abstract
Marine picocyanobacteria, Prochlorococcus and Synechococcus, substantially contribute to marine primary production and have been the subject of extensive ecological and genomic studies. Little is known about their close relatives from freshwater and non-marine environments. Phylogenomic analyses (using 136 proteins) provide strong support for the monophyly of a clade of non-marine picocyanobacteria consisting of Cyanobium, Synechococcus and marine Sub-cluster 5.2; this clade itself is sister to marine Synechococcus and Prochlorococcus. The most basal lineage within the Syn/Pro clade, Sub-Cluster 5.3, includes marine and freshwater strains. Relaxed molecular clock (SSU, LSU) analyses show that while ancestors of the Syn/Pro clade date as far back as the end of the Pre-Cambrian, modern crown groups evolved during the Carboniferous and Triassic. Comparative genomic analyses reveal novel gene cluster arrangements involved in phycobilisome (PBS) metabolism in freshwater strains. Whilst PBS genes in marine Synechococcus are mostly found in one type of phycoerythrin (PE) rich gene cluster (Type III), strains from non-marine habitats, so far, appear to be more diverse both in terms of pigment content and gene arrangement, likely reflecting a wider range of habitats. Our phylogenetic analyses show that the PE genes (mpeBA) evolved via a duplication of the cpeBA genes in an ancestor of the marine and non-marine picocyanobacteria and of the symbiotic strains Synechococcus spongiarum. A 'primitive' Type III-like ancestor containing cpeBA and mpeBA had thus evolved prior to the divergence of the Syn/Pro clade and S. spongiarum. During the diversification of Synechococcus lineages, losses of mpeBA genes may explain the emergence of pigment cluster Types I, II, IIB, and III in both marine and non-marine habitats, with few lateral gene transfer events in specific taxa.
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Affiliation(s)
| | - Giorgio Bianchini
- School of Geographical Sciences, University of Bristol, Bristol, United Kingdom
| | - Andrea Di Cesare
- Institute of Ecosystem Study–Consiglio Nazionale delle Ricerche, Verbania, Italy
- Department of Earth, Environment and Life Sciences, University of Genoa, Genoa, Italy
| | - Cristiana Callieri
- Institute of Ecosystem Study–Consiglio Nazionale delle Ricerche, Verbania, Italy
| | - Nathan A. M. Chrismas
- School of Geographical Sciences, University of Bristol, Bristol, United Kingdom
- The Marine Biological Association of the United Kingdom, The Laboratory, Citadel Hill, Plymouth, United Kingdom
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102
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Utschig LM, Soltau SR, Mulfort KL, Niklas J, Poluektov OG. Z-scheme solar water splitting via self-assembly of photosystem I-catalyst hybrids in thylakoid membranes. Chem Sci 2018; 9:8504-8512. [PMID: 30568774 PMCID: PMC6256728 DOI: 10.1039/c8sc02841a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 10/20/2018] [Indexed: 01/01/2023] Open
Abstract
Nature's solar energy converters, the Photosystem I (PSI) and Photosystem II (PSII) reaction center proteins, flawlessly manage photon capture and conversion processes in plants, algae, and cyanobacteria to drive oxygenic water-splitting and carbon fixation. Herein, we utilize the native photosynthetic Z-scheme electron transport chain to drive hydrogen production from thylakoid membranes by directional electron transport to abiotic catalysts bound at the stromal end of PSI. Pt-nanoparticles readily self-assemble with PSI in spinach and cyanobacterial membranes as evidenced by light-driven H2 production in the presence of a mediating electron shuttle protein and the sacrificial electron donor sodium ascorbate. EPR characterization confirms placement of the Pt-nanoparticles on the acceptor end of PSI. In the absence of sacrificial reductant, H2 production at PSI occurs via coupling to light-induced PSII O2 evolution as confirmed by correlation of catalytic activity to the presence or absence of the PSII inhibitor DCMU. To create a more sustainable system, first-row transition metal molecular cobaloxime and nickel diphosphine catalysts were found to perform photocatalysis when bound in situ to cyanobacterial thylakoid membranes. Thus, the self-assembly of abiotic catalysts with photosynthetic membranes demonstrates a tenable method for accomplishing solar overall water splitting to generate H2, a renewable and clean fuel. This work benchmarks a significant advance toward improving photosynthetic efficiency for solar fuel production.
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Affiliation(s)
- Lisa M Utschig
- Chemical Sciences and Engineering Division , Argonne National Laboratory , Argonne , IL 60439 , USA .
| | - Sarah R Soltau
- Chemical Sciences and Engineering Division , Argonne National Laboratory , Argonne , IL 60439 , USA .
| | - Karen L Mulfort
- Chemical Sciences and Engineering Division , Argonne National Laboratory , Argonne , IL 60439 , USA .
| | - Jens Niklas
- Chemical Sciences and Engineering Division , Argonne National Laboratory , Argonne , IL 60439 , USA .
| | - Oleg G Poluektov
- Chemical Sciences and Engineering Division , Argonne National Laboratory , Argonne , IL 60439 , USA .
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103
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Radioprotective role of cyanobacterial phycobilisomes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2018; 1860:121-128. [PMID: 30465750 DOI: 10.1016/j.bbabio.2018.11.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 11/07/2018] [Accepted: 11/18/2018] [Indexed: 11/20/2022]
Abstract
Cyanobacteria are thought to be responsible for pioneering dioxygen production and the so-called "Great Oxygenation Event" that determined the formation of the ozone layer and the ionosphere restricting ionizing radiation levels reaching our planet, which increased biological diversity but also abolished the necessity of radioprotection. We speculated that ancient protection mechanisms could still be present in cyanobacteria and studied the effect of ionizing radiation and space flight during the Foton-M4 mission on Synechocystis sp. PCC6803. Spectral and functional characteristics of photosynthetic membranes revealed numerous similarities of the effects of α-particles and space flight, which both interrupted excitation energy transfer from phycobilisomes to the photosystems and significantly reduced the concentration of phycobiliproteins. Although photosynthetic activity was severely suppressed, the effect was reversible, and the cells could rapidly recover from the stress. We suggest that the actual existence and the uncoupling of phycobilisomes may play a specific role not only in photo-, but also in radioprotection, which could be crucial for the early evolution of Life on Earth.
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104
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Purification of phycocyanin from Arthrospira platensis by hydrophobic interaction membrane chromatography. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.09.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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105
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Fan G, Zhou J, Zheng X, Chen W. Growth Inhibition of Microcystis aeruginosa by Copper-based MOFs: Performance and Physiological Effect on Algal Cells. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4600] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Gongduan Fan
- College of Civil Engineering; Fuzhou University; 350116 Fujian China
- Department of Chemical & Environmental Engineering; University of Arizona; 1133 E James E Rogers Way, Harshbarger 108 Tucson AZ 85721-0011 USA
| | - Jinjin Zhou
- College of Civil Engineering; Fuzhou University; 350116 Fujian China
| | - Xiaomei Zheng
- College of Civil Engineering; Fuzhou University; 350116 Fujian China
| | - Wei Chen
- College of Civil Engineering; Fuzhou University; 350116 Fujian China
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106
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Cabot JM, Macdonald NP, Phung SC, Breadmore MC, Paull B. Fibre-based electrofluidics on low cost versatile 3D printed platforms for solute delivery, separations and diagnostics; from small molecules to intact cells. Analyst 2018; 141:6422-6431. [PMID: 27786314 DOI: 10.1039/c6an01515h] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A novel and effective fibre-based microfluidic methodology was developed to move and isolate charged solutes, biomolecules, and intact bacterial cells, based upon a novel multi-functional 3D printed supporting platform, with potential applications in the fields of microfluidics and biodiagnostics. Various on-fibre electrophoretic techniques are demonstrated to separate, pre-concentrate, move, split, or cut and collect the isolated zones of target solutes, including proteins and live bacterial cells. The use of knotting to link different fibre materials, and the unique ability of this approach to physically concentrate solutes in different locations are shown such that the concentrated solutes can be physically isolated and easily transferred to other fibres. Application of this novel fibre-based technique within a potential diagnostic platform for urinary tract infection is shown, together with the post-electrophoretic incubation of live bacterial cells, demonstrating the cell survival following on-fibre electrophoretic concentration.
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Affiliation(s)
- Joan M Cabot
- ARC Centre of Excellence for Electromaterials Science (ACES), School of Physical Sciences, Faculty of Science, Engineering and Technology, University of Tasmania, Private Bag 75, Hobart, TAS 7001, Australia. and Australian Centre for Research on Separation Science (ACROSS), School of Physical Sciences, Faculty of Science, Engineering and Technology, University of Tasmania, Private Bag 75, Hobart, TAS 7001, Australia
| | - Niall P Macdonald
- ARC Centre of Excellence for Electromaterials Science (ACES), School of Physical Sciences, Faculty of Science, Engineering and Technology, University of Tasmania, Private Bag 75, Hobart, TAS 7001, Australia. and Australian Centre for Research on Separation Science (ACROSS), School of Physical Sciences, Faculty of Science, Engineering and Technology, University of Tasmania, Private Bag 75, Hobart, TAS 7001, Australia
| | - Sui C Phung
- Australian Centre for Research on Separation Science (ACROSS), School of Physical Sciences, Faculty of Science, Engineering and Technology, University of Tasmania, Private Bag 75, Hobart, TAS 7001, Australia
| | - Michael C Breadmore
- ARC Centre of Excellence for Electromaterials Science (ACES), School of Physical Sciences, Faculty of Science, Engineering and Technology, University of Tasmania, Private Bag 75, Hobart, TAS 7001, Australia. and Australian Centre for Research on Separation Science (ACROSS), School of Physical Sciences, Faculty of Science, Engineering and Technology, University of Tasmania, Private Bag 75, Hobart, TAS 7001, Australia
| | - Brett Paull
- ARC Centre of Excellence for Electromaterials Science (ACES), School of Physical Sciences, Faculty of Science, Engineering and Technology, University of Tasmania, Private Bag 75, Hobart, TAS 7001, Australia. and Australian Centre for Research on Separation Science (ACROSS), School of Physical Sciences, Faculty of Science, Engineering and Technology, University of Tasmania, Private Bag 75, Hobart, TAS 7001, Australia
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107
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Tavanandi HA, Chandralekha Devi A, Raghavarao KSMS. A newer approach for the primary extraction of allophycocyanin with high purity and yield from dry biomass of Arthrospira platensis. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.04.057] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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108
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Remelli W, Santabarbara S. Excitation and emission wavelength dependence of fluorescence spectra in whole cells of the cyanobacterium Synechocystis sp. PPC6803: Influence on the estimation of Photosystem II maximal quantum efficiency. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2018; 1859:1207-1222. [PMID: 30297025 DOI: 10.1016/j.bbabio.2018.09.366] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 09/13/2018] [Accepted: 09/17/2018] [Indexed: 11/20/2022]
Abstract
The fluorescence emission spectrum of Synechocystis sp. PPC6803 cells, at room temperature, displays: i) significant bandshape variations when collected under open (F0) and closed (FM) Photosystem II reaction centre conditions; ii) a marked dependence on the excitation wavelength both under F0 and FM conditions, due to the enhancement of phycobilisomes (PBS) emission upon their direct excitation. As a consequence: iii) the ratio of the variable and maximal fluorescence (FV/FM), that is a commonly employed indicator of the maximal photochemical quantum efficiency of PSII (Φpc, PSII), displays a significant dependency on both the excitation and the emission (detection) wavelength; iv) the FV/FM excitation/emission wavelength dependency is due, primarily, to the overlap of PSII emission with that of supercomplexes showing negligible changes in quantum yield upon trap closure, i.e. PSI and a PBS fraction which is incapable to transfer the excitation energy efficiently to core complexes. v) The contribution to the cellular emission and the relative absorption-cross section of PSII, PSI and uncoupled PBS are extracted using a spectral decomposition strategy. It is concluded that vi) Φpc, PSII is generally underestimated from the FV/FM measurements in this organism and, the degree of the estimation bias, which can exceed 50%, depends on the measurement conditions. Spectral modelling based on the decomposed emission/cross-section profiles were extended to other processes typically monitored from steady-state fluorescence measurements, in the presence of an actinic illumination, in particular non-photochemical quenching. It is suggested that vii) the quenching extent is generally underestimated in analogy to FV/FM but that viii) the location of quenching sites can be discriminated based on the combined excitation/emission spectral analysis.
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Affiliation(s)
- William Remelli
- Photosynthesis Research Unit, Centro Studi sulla Biologia Cellulare e Molecolare delle Piante, 20133 Milano, Italy
| | - Stefano Santabarbara
- Photosynthesis Research Unit, Centro Studi sulla Biologia Cellulare e Molecolare delle Piante, 20133 Milano, Italy.
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109
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Bertone E, Burford MA, Hamilton DP. Fluorescence probes for real-time remote cyanobacteria monitoring: A review of challenges and opportunities. WATER RESEARCH 2018; 141:152-162. [PMID: 29783168 DOI: 10.1016/j.watres.2018.05.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 05/02/2018] [Accepted: 05/02/2018] [Indexed: 06/08/2023]
Abstract
In recent years, there has been a widespread deployment of submersible fluorescence sensors by water utilities. They are used to measure diagnostic pigments and estimate algae and cyanobacteria abundance in near real-time. Despite being useful and promising tools, operators and decision-makers often rely on the data provided by these probes without a full understanding of their limitations. As a result, this may lead to wrong and misleading estimations which, in turn, means that researchers and technicians distrust these sensors. In this review paper, we list and discuss the main limitations of such probes, as well as identifying the effect of environmental factors on pigment production, and in turn, the conversion to cyanobacteria abundance estimation. We argue that a comprehensive calibration approach to obtain reliable readings goes well beyond manufacturers' recommendations, and should involve several context-specific experiments. We also believe that if such a comprehensive set of experiments is conducted, the data collected from fluorescence sensors could be used in artificial intelligence modelling approaches to reliably predict, in near real-time, the presence and abundance of different cyanobacteria species. This would have significant benefits for both drinking and recreational water management, given that cyanobacterial toxicity, and taste and odour compounds production, are species-dependent.
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Affiliation(s)
- Edoardo Bertone
- Griffith School of Engineering and Built Environment, Griffith University, Parklands Drive, Southport, Queensland 4222, Australia; Cities Research Institute, Griffith University, Parklands Drive, Southport, Queensland 4222, Australia.
| | - Michele A Burford
- Australian Rivers Institute, Griffith University, Kessels Road, Nathan, Queensland 4111, Australia
| | - David P Hamilton
- Australian Rivers Institute, Griffith University, Kessels Road, Nathan, Queensland 4111, Australia
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110
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Sonani RR, Gardiner A, Rastogi RP, Cogdell R, Robert B, Madamwar D. Site, trigger, quenching mechanism and recovery of non-photochemical quenching in cyanobacteria: recent updates. PHOTOSYNTHESIS RESEARCH 2018; 137:171-180. [PMID: 29574660 DOI: 10.1007/s11120-018-0498-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 03/08/2018] [Indexed: 06/08/2023]
Abstract
Cyanobacteria exhibit a novel form of non-photochemical quenching (NPQ) at the level of the phycobilisome. NPQ is a process that protects photosystem II (PSII) from possible highlight-induced photo-damage. Although significant advancement has been made in understanding the NPQ, there are still some missing details. This critical review focuses on how the orange carotenoid protein (OCP) and its partner fluorescence recovery protein (FRP) control the extent of quenching. What is and what is not known about the NPQ is discussed under four subtitles; where does exactly the site of quenching lie? (site), how is the quenching being triggered? (trigger), molecular mechanism of quenching (quenching) and recovery from quenching. Finally, a recent working model of NPQ, consistent with recent findings, is been described.
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Affiliation(s)
- Ravi R Sonani
- Post-Graduate Department of Biosciences, Sardar Patel University, Bakrol, Anand, Gujarat, 388315, India.
- Institute of Molecular, Cell and System Biology, University of Glasgow, Glasgow, G12 8TA, UK.
- CEA, Institute of Biology and Technology of Saclay, CNRS, 91191, Gif/Yvette, France.
- School of Sciences, P. P. Savani University, Dhamdod, Kosamba, Surat, Gujarat, 394125, India.
| | - Alastair Gardiner
- Institute of Molecular, Cell and System Biology, University of Glasgow, Glasgow, G12 8TA, UK
| | - Rajesh P Rastogi
- Post-Graduate Department of Biosciences, Sardar Patel University, Bakrol, Anand, Gujarat, 388315, India
| | - Richard Cogdell
- Institute of Molecular, Cell and System Biology, University of Glasgow, Glasgow, G12 8TA, UK.
| | - Bruno Robert
- CEA, Institute of Biology and Technology of Saclay, CNRS, 91191, Gif/Yvette, France.
| | - Datta Madamwar
- Post-Graduate Department of Biosciences, Sardar Patel University, Bakrol, Anand, Gujarat, 388315, India.
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111
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Xu C, Sun T, Li S, Chen L, Zhang W. Adaptive laboratory evolution of cadmium tolerance in Synechocystis sp. PCC 6803. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:205. [PMID: 30061927 PMCID: PMC6058365 DOI: 10.1186/s13068-018-1205-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 07/16/2018] [Indexed: 05/08/2023]
Abstract
BACKGROUND Cadmium has been a significant threat to environment and human health due to its high toxicity and wide application in fossil-fuel burning and battery industry. Cyanobacteria are one of the most dominant prokaryotes, and the previous studies suggested that they could be valuable in removing Cd2+ from waste water. However, currently, the tolerance to cadmium is very low in cyanobacteria. To further engineer cyanobacteria for the environmental application, it is thus necessary to determine the mechanism that they respond to high concentration of cadmium. RESULTS In this study, a robust strain of Synechocystis PCC 6803 (named ALE-9.0) tolerant to CdSO4 with a concentration up to 9.0 µM was successfully isolated via adaptive laboratory evolution over 802-day continuous passages under cadmium stress. Whole-genome re-sequencing was then performed and nine mutations were identified for the evolved strain compared to the wild-type strain. Among these mutations, a large fragment deletion in slr0454 encoding a cation or drug efflux system protein was found to contribute directly to the resistance to Cd2+ stress. In addition, five other mutations were also demonstrated related to the improved Cd2+ tolerance in ALE-9.0. Moreover, the evolved ALE-9.0 strain was found to obtain cross tolerance to some other heavy metals like zinc and cobalt as well as higher resistance to high light. CONCLUSIONS The work here identified six genes and their mutations related to Cd2+ tolerance in Synechocystis PCC 6803, and demonstrated the feasibility of adaptive laboratory evolution in tolerance modifications. This work also provided valuable information regarding the cadmium tolerance mechanism in Synechocystis PCC 6803, and useful insights for cyanobacterial robustness and tolerance engineering.
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Affiliation(s)
- Chunxiao Xu
- Laboratory of Synthetic Microbiology, School of Chemical Engineering & Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
- Key Laboratory of Systems Bioengineering, Ministry of Education of China, Tianjin, 300072 People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, People’s Republic of China
| | - Tao Sun
- Laboratory of Synthetic Microbiology, School of Chemical Engineering & Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
- Key Laboratory of Systems Bioengineering, Ministry of Education of China, Tianjin, 300072 People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, People’s Republic of China
| | - Shubin Li
- Laboratory of Synthetic Microbiology, School of Chemical Engineering & Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
- Key Laboratory of Systems Bioengineering, Ministry of Education of China, Tianjin, 300072 People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, People’s Republic of China
| | - Lei Chen
- Laboratory of Synthetic Microbiology, School of Chemical Engineering & Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
- Key Laboratory of Systems Bioengineering, Ministry of Education of China, Tianjin, 300072 People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, People’s Republic of China
| | - Weiwen Zhang
- Laboratory of Synthetic Microbiology, School of Chemical Engineering & Technology, Tianjin University, Tianjin, 300072 People’s Republic of China
- Key Laboratory of Systems Bioengineering, Ministry of Education of China, Tianjin, 300072 People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, People’s Republic of China
- Center for Biosafety Research and Strategy, Tianjin University, Tianjin, People’s Republic of China
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112
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Huerta-Viga A, Nguyen LL, Amirjalayer S, Sim JHN, Zhang Z, Tan HS. Glass formation of a DMSO-water mixture probed with a photosynthetic pigment. Phys Chem Chem Phys 2018; 20:17552-17556. [PMID: 29915826 DOI: 10.1039/c8cp03058h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Despite their extensive industrial usage, glass-forming liquids are not fully understood, and methods to investigate their dynamical heterogeneity are sought after. Here we show how the appearance of a second component in the visible absorption spectrum of a photosynthetic pigment upon cooling can be used to probe the glass transition of a dimethylsulfoxide-water mixture. The changes in the relative ratio of the two components with respect to temperature follow a sigmoid curve, and we show that the second component arises due to protonation of the pigment at low temperatures. Furthermore, from visible transient absorption spectra we show that, unlike the first component, the dynamics of the second component slows down significantly at lower temperatures, suggesting that there are two distinct environments with fast and slow fluctuations. Our results therefore enable a new method to characterize the dynamical heterogeneity of glass-forming liquids.
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Affiliation(s)
- Adriana Huerta-Viga
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore.
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113
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Petrova N, Todinova S, Laczko-Dobos H, Zakar T, Vajravel S, Taneva S, Gombos Z, Krumova S. Structural integrity of Synechocystis sp. PCC 6803 phycobilisomes evaluated by means of differential scanning calorimetry. PHOTOSYNTHESIS RESEARCH 2018; 137:95-104. [PMID: 29322483 DOI: 10.1007/s11120-018-0481-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 01/05/2018] [Indexed: 06/07/2023]
Abstract
Phycobilisomes (PBSs) are supramolecular pigment-protein complexes that serve as light-harvesting antennae in cyanobacteria. They are built up by phycobiliproteins assembled into allophycocyanin core cylinders (ensuring the physical interaction with the photosystems) and phycocyanin rods (protruding from the cores and having light-harvesting function), the whole PBSs structure being maintained by linker proteins. PBSs play major role in light-harvesting optimization in cyanobacteria; therefore, the characterization of their structural integrity in intact cells is of great importance. The present study utilizes differential scanning calorimetry and spectroscopy techniques to explore for the first time, the thermodynamic stability of PBSs in intact Synechocystis sp. PCC 6803 cells and to probe its alteration as a result of mutations or under different growth conditions. As a first step, we characterize the thermodynamic behavior of intact and dismantled PBSs isolated from wild-type cells (having fully assembled PBSs) and from CK mutant cells (that lack phycocyanin rods and contain only allophycocyanin cores), and identified the thermal transitions of phycocyanin and allophycocyanin units in vitro. Next, we demonstrate that in intact cells PBSs exhibit sharp, high amplitude thermal transition at about 63 °C that strongly depends on the structural integrity of the PBSs supercomplex. Our findings implicate that calorimetry could offer a valuable approach for the assessment of the influence of variety of factors affecting the stability and structural organization of phycobilisomes in intact cyanobacterial cells.
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Affiliation(s)
- Nia Petrova
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 21, 1113, Sofia, Bulgaria
| | - Svetla Todinova
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 21, 1113, Sofia, Bulgaria
| | - Hajnalka Laczko-Dobos
- Institute of Plant Biology, Biological Research Center, Hungarian Academy of Sciences, Temesvári krt. 62, Szeged, 6726, Hungary
| | - Tomas Zakar
- Institute of Plant Biology, Biological Research Center, Hungarian Academy of Sciences, Temesvári krt. 62, Szeged, 6726, Hungary
| | - Sindhujaa Vajravel
- Institute of Plant Biology, Biological Research Center, Hungarian Academy of Sciences, Temesvári krt. 62, Szeged, 6726, Hungary
| | - Stefka Taneva
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 21, 1113, Sofia, Bulgaria
| | - Zoltan Gombos
- Institute of Plant Biology, Biological Research Center, Hungarian Academy of Sciences, Temesvári krt. 62, Szeged, 6726, Hungary
| | - Sashka Krumova
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 21, 1113, Sofia, Bulgaria.
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114
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Xiang R, Shi J, Zhang H, Dong C, Liu L, Fu J, He X, Yan Y, Wu Z. Chlorophyll a fluorescence and transcriptome reveal the toxicological effects of bisphenol A on an invasive cyanobacterium, Cylindrospermopsis raciborskii. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2018; 200:188-196. [PMID: 29775926 DOI: 10.1016/j.aquatox.2018.05.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 05/07/2018] [Accepted: 05/07/2018] [Indexed: 06/08/2023]
Abstract
Bisphenol A has attracted worldwide attention due to its harmful effects on humans, animals and plants. In this study, the toxicological effects of BPA on Cylindrospermopsis raciborskii were assessed based on chlorophyll a fluorescence and transcriptome analyses. The results showed that the growth of C. raciborskii was significantly inhibited when BPA exceeded 0.1 mg L-1. A marked rise of phase J was observed at a concentration greater than 0.1 mg L-1, while a K phase appeared at 20 mg L-1. The chlorophyll a fluorescence parameters of RC/CS0, F0, φP0, φE0, and ψ0, underwent a significant decline under all treatments of BPA, whereas a significant increase in both VJ and M0 occurred under all concentrations of BPA. Additionally, ABS/RC and DIo/RC markedly increased at 10 mg L-1 and 20 mg L-1. The transcriptome analysis revealed that the genes of photosynthesis, including psbA, psbB, psbC, psbD, apcA, apcB, cpcA, and cpcB, as well as those of chlorophyll and carotenoid biosynthesis, namely hemN, acsF, chlL, chlN, chlP, crtB, pds, were all down-regulated. Moreover, BPA also inhibited the oxidative phosphorylation, glycolysis/gluconeogenesis, citrate cycle (TCA cycle), and fatty acid metabolism in C. raciborskii. Taken together, these results suggest BPA can negatively affect the expression of multiple genes and the vital energy metabolism process to arrest the growth and photosynthesis of C. raciborskii.
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Affiliation(s)
- Rong Xiang
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, School of Life Science, Southwest University, Chongqing, 400715, PR China
| | - Junqiong Shi
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, School of Life Science, Southwest University, Chongqing, 400715, PR China
| | - Hongbo Zhang
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, School of Life Science, Southwest University, Chongqing, 400715, PR China
| | - Congcong Dong
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, School of Life Science, Southwest University, Chongqing, 400715, PR China
| | - Li Liu
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, School of Life Science, Southwest University, Chongqing, 400715, PR China
| | - JunKe Fu
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, School of Life Science, Southwest University, Chongqing, 400715, PR China
| | - Xinyu He
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, School of Life Science, Southwest University, Chongqing, 400715, PR China
| | - Yanjun Yan
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, School of Life Science, Southwest University, Chongqing, 400715, PR China
| | - Zhongxing Wu
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, School of Life Science, Southwest University, Chongqing, 400715, PR China.
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115
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Phycocyanin Production by Aphanothece microscopica Nägeli in Synthetic Medium Supplemented with Sugarcane Vinasse. Appl Biochem Biotechnol 2018; 187:129-139. [PMID: 29911264 DOI: 10.1007/s12010-018-2811-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Accepted: 06/05/2018] [Indexed: 01/30/2023]
Abstract
This study focused on the evaluation of mixotrophic and heterotrophic production of phycocyanin by A. microscopica, analysis of kinetic parameters, the effect of freezing and thawing on phycocyanin yield, and nutrient removal during heterotrophic growth. During mixotrophic growth, maximum phycocyanin yield (1.50 mgphycocyanin g-1biomass) was obtained after 12 h, while the heterotrophic cultivation yielded 1.39 mgphycocyanin g-1biomass. The mixotrophic cultivation of A. microscopica showed maximum specific growth rate of 0.025 h-1, against 0.010 h-1 for the photoautotrophic cultivation, and 0.08 h-1 in heterotrophic conditions. The mixotrophic cultivation had a specific rate of phycocyanin production of 9.86 mgphycocyanin mgbiomass-1 h-1, while the photoautotrophic had 2.81 mgphycocyanin mgbiomass-1 h-1, and the heterotrophic, 49.18 mgphycocyanin mgbiomass-1 h-1. Carbon and nitrogen contents present in sugarcane vinasse were decreased in 16.69 and 15.97%, respectively, after 6 h of heterotrophic growth. Thus, it was shown that the mixotrophic production of phycocyanin by Aphanothece microscopica Nägeli in BG11 medium supplemented with vinasse is feasible.
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116
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Structural characterization and antioxidant potential of phycocyanin from the cyanobacterium Geitlerinema sp. H8DM. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.04.024] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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117
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Levi M, Sendersky E, Schwarz R. Decomposition of cyanobacterial light harvesting complexes: NblA-dependent role of the bilin lyase homolog NblB. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2018; 94:813-821. [PMID: 29575252 DOI: 10.1111/tpj.13896] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 02/28/2018] [Accepted: 03/02/2018] [Indexed: 06/08/2023]
Abstract
Phycobilisomes, the macromolecular light harvesting complexes of cyanobacteria are degraded under nutrient-limiting conditions. This crucial response is required to adjust light excitation to the metabolic status and avoid damage by excess excitation. Phycobilisomes are comprised of phycobiliproteins, apo-proteins that covalently bind bilin chromophores. In the cyanobacterium Synechococcus elongatus, the phycobiliproteins allophycocyanin and phycocyanin comprise the core and the rods of the phycobilisome, respectively. Previously, NblB was identified as an essential component required for phycocyanin degradation under nutrient starvation. This protein is homologous to bilin-lyases, enzymes that catalyze the covalent attachment of bilins to apo-proteins. However, the nblB-inactivated strain is not impaired in phycobiliprotein synthesis, but rather is characterized by aberrant phycocyanin degradation. Here, using a phycocyanin-deficient strain, we demonstrate that NblB is required for degradation of the core pigment, allophycocyanin. Furthermore, we show that the protein NblB is expressed under nutrient sufficient conditions, but during nitrogen starvation its level decreases about two-fold. This finding is in contrast to an additional component essential for degradation, NblA, the expression of which is highly induced under starvation. We further identified NblB residues required for phycocyanin degradation in vivo. Finally, we demonstrate phycocyanin degradation in a cell-free system, thereby providing support for the suggestion that NblB directly mediates pigment degradation by chromophore detachment. The dependence of NblB function on NblA revealed using this system, together with the results indicating presence of NblB under nutrient sufficient conditions, suggests a rapid mechanism for induction of pigment degradation, which requires only the expression of NblA.
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Affiliation(s)
- Mali Levi
- The Mina and Everard Goodman, Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Eleonora Sendersky
- The Mina and Everard Goodman, Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Rakefet Schwarz
- The Mina and Everard Goodman, Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
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118
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Gwizdala M, Botha JL, Wilson A, Kirilovsky D, van Grondelle R, Krüger TPJ. Switching an Individual Phycobilisome Off and On. J Phys Chem Lett 2018; 9:2426-2432. [PMID: 29688018 DOI: 10.1021/acs.jpclett.8b00767] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Photosynthetic organisms have found various smart ways to cope with unexpected changes in light conditions. In many cyanobacteria, the lethal effects of a sudden increase in light intensity are mitigated mainly by the interaction between phycobilisomes (PBs) and the orange carotenoid protein (OCP). The latter senses high light intensities by means of photoactivation and triggers thermal energy dissipation from the PBs. Due to the brightness of their emission, PBs can be characterized at the level of individual complexes. Here, energy dissipation from individual PBs was reversibly switched on and off using only light and OCP. We reveal the presence of quasistable intermediate states during the binding and unbinding of OCP to PB, with a spectroscopic signature indicative of transient decoupling of some of the PB rods during docking of OCP. Real-time control of emission from individual PBs has the potential to contribute to the development of new super-resolution imaging techniques.
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Affiliation(s)
- Michal Gwizdala
- Department of Physics and Astronomy , Faculty of Sciences, VU University , De Boelelaan 1081 , 1081 HV Amsterdam , The Netherlands
- Department of Physics , Faculty of Natural and Agricultural Sciences, University of Pretoria , Private bag X20, Hatfield 0028 , South Africa
| | - Joshua L Botha
- Department of Physics , Faculty of Natural and Agricultural Sciences, University of Pretoria , Private bag X20, Hatfield 0028 , South Africa
| | - Adjélé Wilson
- Unité de Recherche Associée 2096 , Centre National de la Recherche Scientifique , Service de Bioénergétique, 91191 Gif sur Yvette , France
| | - Diana Kirilovsky
- Unité de Recherche Associée 2096 , Centre National de la Recherche Scientifique , Service de Bioénergétique, 91191 Gif sur Yvette , France
| | - Rienk van Grondelle
- Department of Physics and Astronomy , Faculty of Sciences, VU University , De Boelelaan 1081 , 1081 HV Amsterdam , The Netherlands
| | - Tjaart P J Krüger
- Department of Physics , Faculty of Natural and Agricultural Sciences, University of Pretoria , Private bag X20, Hatfield 0028 , South Africa
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119
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Sluchanko NN, Slonimskiy YB, Maksimov EG. Features of Protein-Protein Interactions in the Cyanobacterial Photoprotection Mechanism. BIOCHEMISTRY (MOSCOW) 2018. [PMID: 29523061 DOI: 10.1134/s000629791713003x] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Photoprotective mechanisms of cyanobacteria are characterized by several features associated with the structure of their water-soluble antenna complexes - the phycobilisomes (PBs). During energy transfer from PBs to chlorophyll of photosystem reaction centers, the "energy funnel" principle is realized, which regulates energy flux due to the specialized interaction of the PBs core with a quenching molecule capable of effectively dissipating electron excitation energy into heat. The role of the quencher is performed by ketocarotenoid within the photoactive orange carotenoid protein (OCP), which is also a sensor for light flux. At a high level of insolation, OCP is reversibly photoactivated, and this is accompanied by a significant change in its structure and spectral characteristics. Such conformational changes open the possibility for protein-protein interactions between OCP and the PBs core (i.e., activation of photoprotection mechanisms) or the fluorescence recovery protein. Even though OCP was discovered in 1981, little was known about the conformation of its active form until recently, as well as about the properties of homologs of its N and C domains. Studies carried out during recent years have made a breakthrough in understanding of the structural-functional organization of OCP and have enabled discovery of new aspects of the regulation of photoprotection processes in cyanobacteria. This review focuses on aspects of protein-protein interactions between the main participants of photoprotection reactions and on certain properties of representatives of newly discovered families of OCP homologs.
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Affiliation(s)
- N N Sluchanko
- Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology", Russian Academy of Sciences, Moscow, 119071, Russia.
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120
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Gwizdala M, Krüger TPJ, Wahadoszamen M, Gruber JM, van Grondelle R. Phycocyanin: One Complex, Two States, Two Functions. J Phys Chem Lett 2018; 9:1365-1371. [PMID: 29504765 DOI: 10.1021/acs.jpclett.8b00621] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Solar energy captured by pigments embedded in light-harvesting complexes can be transferred to neighboring pigments, dissipated, or emitted as fluorescence. Only when it reaches a reaction center is the excitation energy stabilized in the form of a charge separation and converted into chemical energy. Well-directed and regulated energy transfer within the network of pigments is therefore of crucial importance for the success of the photosynthetic processes. Using single-molecule spectroscopy, we show that phycocyanin can dynamically switch between two spectrally distinct states originating from two different conformations. Unexpectedly, one of the two states has a red-shifted emission spectrum. This state is not involved in energy dissipation; instead, we propose that it is involved in direct energy transfer to photosystem I. Finally, our findings suggest that the function of linker proteins in phycobilisomes is to stabilize one state or the other, thus controlling the light-harvesting functions of phycocyanin.
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Affiliation(s)
- Michal Gwizdala
- Department of Physics , University of Pretoria , Pretoria 0023 , South Africa
- Department of Physics and Astronomy , Vrije Universiteit Amsterdam , Amsterdam 1081 HV , The Netherlands
| | - Tjaart P J Krüger
- Department of Physics , University of Pretoria , Pretoria 0023 , South Africa
| | - Md Wahadoszamen
- Department of Physics and Astronomy , Vrije Universiteit Amsterdam , Amsterdam 1081 HV , The Netherlands
- Department of Physics , University of Dhaka , Dhaka 1000 , Bangladesh
| | - J Michael Gruber
- Department of Physics and Astronomy , Vrije Universiteit Amsterdam , Amsterdam 1081 HV , The Netherlands
| | - Rienk van Grondelle
- Department of Physics and Astronomy , Vrije Universiteit Amsterdam , Amsterdam 1081 HV , The Netherlands
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121
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Nganou C, Adir N, Mkandawire M. Cryospectroscopy Studies of Intact Light-Harvesting Antennas Reveal Empirical Electronic Energy Transitions in Two Cyanobacteria Species. J Phys Chem B 2018; 122:3068-3078. [DOI: 10.1021/acs.jpcb.8b00714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Collins Nganou
- Verschuren Centre for Sustainability in Energy and the Environment, Cape Breton University, P.O. Box 5300, 1250 Grand Lake Road, Sydney, Nova Scotia, Canada B1P 6L2
| | - Noam Adir
- Schulich Faculty of Chemistry, Technion, Israel Institute of Technology, Haifa 32000 Israel
| | - Martin Mkandawire
- Verschuren Centre for Sustainability in Energy and the Environment, Cape Breton University, P.O. Box 5300, 1250 Grand Lake Road, Sydney, Nova Scotia, Canada B1P 6L2
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122
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de Morais MG, da Fontoura Prates D, Moreira JB, Duarte JH, Costa JAV. Phycocyanin from Microalgae: Properties, Extraction and Purification, with Some Recent Applications. Ind Biotechnol (New Rochelle N Y) 2018. [DOI: 10.1089/ind.2017.0009] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Affiliation(s)
- Michele Greque de Morais
- Laboratory of Microbiology and Biochemistry, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil
| | - Denise da Fontoura Prates
- Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil
| | - Juliana Botelho Moreira
- Laboratory of Microbiology and Biochemistry, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil
| | - Jessica Hartwig Duarte
- Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil
| | - Jorge Alberto Vieira Costa
- Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil
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123
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Putative model based on iTRAQ proteomics for Spirulina morphogenesis mechanisms. J Proteomics 2018; 171:73-80. [DOI: 10.1016/j.jprot.2017.03.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 02/13/2017] [Accepted: 03/19/2017] [Indexed: 11/21/2022]
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124
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Harris D, Bar-Zvi S, Lahav A, Goldshmid I, Adir N. The Structural Basis for the Extraordinary Energy-Transfer Capabilities of the Phycobilisome. Subcell Biochem 2018; 87:57-82. [PMID: 29464557 DOI: 10.1007/978-981-10-7757-9_3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Light absorption is the initial step in the photosynthetic process. In all species, most of the light is absorbed by dedicated pigment-protein complexes called light harvesting complexes or antenna complexes. In the case of cyanobacteria and red-algae, photosynthetic organisms found in a wide variety of ecological niches, the major antenna is called the Phycobilisome (PBS). The PBS has many unique characteristics that sets it apart from the antenna complexes of other organisms (bacteria, algae and plants). These differences include the type of light absorbing chromophores, the protein environment of the chromophores, the method of assembly and association and the intercellular location with respect to the photosynthetic reaction centers (RCs). Since the final goal of all antenna complexes is the same - controlled absorption and transfer of the energy of the sun to the RCs, the unique structural and chemical differences of the PBS also require unique energy transfer mechanisms and pathways. In this review we will describe in detail the structural facets that lead to a mature PBS, followed by an attempt to understand the energy transfer properties of the PBS as they have been measured experimentally.
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Affiliation(s)
- Dvir Harris
- The Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa, Israel
| | - Shira Bar-Zvi
- The Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa, Israel
| | - Avital Lahav
- The Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa, Israel
| | - Itay Goldshmid
- The Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa, Israel
| | - Noam Adir
- The Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa, Israel.
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125
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Wu J, Chen H, Jiang P. Chromophore attachment to fusion protein of streptavidin and recombinant allophycocyanin α subunit. Bioengineered 2018; 9:108-115. [PMID: 28448741 PMCID: PMC5972920 DOI: 10.1080/21655979.2017.1321282] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The fusion protein (SLA) of streptavidin and allophycocyanin α subunit (holo-ApcA) was biosynthesized in Escherichia coli by a dual plasmid system. The recombinant SLA, purified by affinity chromatography, showed spectral properties similar to natural allophycocyanin α subunit (ApcA). Spectral and Zinc staining analysis indicated that the recombinant SLA covalently bound phycocyanobilin (PCB). To improve chromophorylation rate of recombinant SLA, an in vitro chromophore attachment reaction system was established, which contained partially chromophylated SLA, PCB and lyase CpcS. Spectral analysis showed that PCB bound to the recombinant SLA rapidly during the reaction. The chromophorylation rate of SLA was improved from 21.1% to 86.5%. Immunofluorescence assay showed that SLA with high chromophorylation rate had higher detection signal. Thus, in vitro chromophore attachment is an effective way to improve the chromophorylation rate of recombinant phycobiliprotein.
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Affiliation(s)
- Jing Wu
- a Key Laboratory of Experimental Marine Biology, Institute of Oceanology , Chinese Academy of Sciences , Qingdao , China.,b Laboratory for Marine Biology and Biotechnology , Qingdao National Laboratory for Marine Science and Technology , Qingdao , China.,c University of Chinese Academy of Sciences , Beijing , China
| | - Huaxin Chen
- a Key Laboratory of Experimental Marine Biology, Institute of Oceanology , Chinese Academy of Sciences , Qingdao , China.,b Laboratory for Marine Biology and Biotechnology , Qingdao National Laboratory for Marine Science and Technology , Qingdao , China
| | - Peng Jiang
- a Key Laboratory of Experimental Marine Biology, Institute of Oceanology , Chinese Academy of Sciences , Qingdao , China.,b Laboratory for Marine Biology and Biotechnology , Qingdao National Laboratory for Marine Science and Technology , Qingdao , China
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126
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Agro-Industrial Waste Based Phycocyanin Production fromOscillatoriasp. 50 A:daf-16 Modulating Effect inCaenorhabditis elegansand p53 Dependent Apoptosis in HeLa cells. ChemistrySelect 2017. [DOI: 10.1002/slct.201702460] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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127
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Murton J, Nagarajan A, Nguyen AY, Liberton M, Hancock HA, Pakrasi HB, Timlin JA. Population-level coordination of pigment response in individual cyanobacterial cells under altered nitrogen levels. PHOTOSYNTHESIS RESEARCH 2017; 134:165-174. [PMID: 28733863 PMCID: PMC5645440 DOI: 10.1007/s11120-017-0422-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 07/05/2017] [Indexed: 06/07/2023]
Abstract
Cyanobacterial phycobilisome (PBS) pigment-protein complexes harvest light and transfer the energy to reaction centers. Previous ensemble studies have shown that cyanobacteria respond to changes in nutrient availability by modifying the structure of PBS complexes, but this process has not been visualized for individual pigments at the single-cell level due to spectral overlap. We characterized the response of four key photosynthetic pigments to nitrogen depletion and repletion at the subcellular level in individual, live Synechocystis sp. PCC 6803 cells using hyperspectral confocal fluorescence microscopy and multivariate image analysis. Our results revealed that PBS degradation and re-synthesis comprise a rapid response to nitrogen fluctuations, with coordinated populations of cells undergoing pigment modifications. Chlorophyll fluorescence originating from photosystem I and II decreased during nitrogen starvation, but no alteration in subcellular chlorophyll localization was found. We observed differential rod and core pigment responses to nitrogen deprivation, suggesting that PBS complexes undergo a stepwise degradation process.
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Affiliation(s)
- Jaclyn Murton
- Bioenergy and Defense Technologies, Sandia National Laboratories, Albuquerque, NM, 87123, USA
| | - Aparna Nagarajan
- Department of Biology, Washington University, St. Louis, MO, 63130, USA
- Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Amelia Y Nguyen
- Department of Biology, Washington University, St. Louis, MO, 63130, USA
- United States Environmental Protection Agency, Washington, DC, 20460, USA
| | - Michelle Liberton
- Department of Biology, Washington University, St. Louis, MO, 63130, USA
| | - Harmony A Hancock
- Bioenergy and Defense Technologies, Sandia National Laboratories, Albuquerque, NM, 87123, USA
- Department of Biological Sciences, Old Dominion University, Norfolk, VA, 23529, USA
| | - Himadri B Pakrasi
- Department of Biology, Washington University, St. Louis, MO, 63130, USA
| | - Jerilyn A Timlin
- Bioenergy and Defense Technologies, Sandia National Laboratories, Albuquerque, NM, 87123, USA.
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128
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Göritz A, von Hoesslin S, Hundhausen F, Gege P. Envilab: Measuring phytoplankton in-vivo absorption and scattering properties under tunable environmental conditions. OPTICS EXPRESS 2017; 25:25267-25277. [PMID: 29041196 DOI: 10.1364/oe.25.025267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 09/03/2017] [Indexed: 06/07/2023]
Abstract
Optical remote sensing of phytoplankton draws on distinctive spectral features which can vary with both species and environmental conditions. Here, we present a set-up (Envilab) for growing phytoplankton under well-defined light, temperature and nutrient conditions. The custom-built light source enables creation of light with spectral composition similar to natural aquatic environments. Spectral tuning allows for light quality studies. Attenuation is monitored with a spectrometer in transmission mode. In combination with automated spectrophotometer and fluorimeter measurements, absorption and excitation-emission-fluorescence spectra are recorded. The set-up opens the door for systematic studies on phytoplankton optical properties and physiology.
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129
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Eisenberg I, Harris D, Levi-Kalisman Y, Yochelis S, Shemesh A, Ben-Nissan G, Sharon M, Raviv U, Adir N, Keren N, Paltiel Y. Concentration-based self-assembly of phycocyanin. PHOTOSYNTHESIS RESEARCH 2017; 134:39-49. [PMID: 28577216 DOI: 10.1007/s11120-017-0406-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 05/22/2017] [Indexed: 06/07/2023]
Abstract
Cyanobacteria light-harvesting complexes can change their structure to cope with fluctuating environmental conditions. Studying in vivo structural changes is difficult owing to complexities imposed by the cellular environment. Mimicking this system in vitro is challenging, as well. The in vivo system is highly concentrated, and handling similar in vitro concentrated samples optically is difficult because of high absorption. In this research, we mapped the cyanobacteria antennas self-assembly pathways using highly concentrated solutions of phycocyanin (PC) that mimic the in vivo condition. PC was isolated from the thermophilic cyanobacterium Thermosynechococcus vulcanus and measured by several methods. PC has three oligomeric states: hexamer, trimer, and monomer. We showed that the oligomeric state was changed upon increase of PC solution concentration. This oligomerization mechanism may enable photosynthetic organisms to adapt their light-harvesting system to a wide range of environmental conditions.
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Affiliation(s)
- Ido Eisenberg
- Applied Physics Department, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 9190401, Israel
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 9190401, Israel
| | - Dvir Harris
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa, 3200003, Israel
| | - Yael Levi-Kalisman
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 9190401, Israel
- The Institute of Life Sciences, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 9190401, Israel
| | - Shira Yochelis
- Applied Physics Department, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 9190401, Israel
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 9190401, Israel
| | - Asaf Shemesh
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 9190401, Israel
- Institute of Chemistry, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 91904, Israel
| | - Gili Ben-Nissan
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Michal Sharon
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Uri Raviv
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 9190401, Israel
- Institute of Chemistry, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 91904, Israel
| | - Noam Adir
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa, 3200003, Israel
| | - Nir Keren
- Department of Plant and Environmental Sciences, Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 9190401, Israel
| | - Yossi Paltiel
- Applied Physics Department, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 9190401, Israel.
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 9190401, Israel.
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130
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Jiang L, Wang Y, Yin Q, Liu G, Liu H, Huang Y, Li B. Phycocyanin: A Potential Drug for Cancer Treatment. J Cancer 2017; 8:3416-3429. [PMID: 29151925 PMCID: PMC5687155 DOI: 10.7150/jca.21058] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 08/30/2017] [Indexed: 12/19/2022] Open
Abstract
Phycocyanin isolated from marine organisms has the characteristics of high efficiency and low toxicity, and it can be used as a functional food. It has been reported that phycocyanin has anti-oxidative function, anti-inflammatory activity, anti-cancer function, immune enhancement function, liver and kidney protection pharmacological effects. Thus, phycocyanin has an important development and utilization as a potential drug, and phycocyanin has become a new hot spot in the field of drug research. So far, there are more and more studies have shown that phycocyanin has the anti-cancer effect, which can block the proliferation of cancer cells and kill cancer cells. Phycocyanin exerts anti-cancer activity by blocking tumor cell cell cycle, inducing tumor cell apoptosis and autophagy, thereby phycocyanin can serve as a promising anti-cancer agent. This review discusses the therapeutic use of phycocyanin and focuses on the latest advances of phycocyanin as a promising anti-cancer drug.
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Affiliation(s)
- Liangqian Jiang
- Department of Genetics and Cell Biology, Basic medical college, 308 Ningxia Road, Qingdao University, Qingdao, China, 266071
| | - Yujuan Wang
- Department of Genetics and Cell Biology, Basic medical college, 308 Ningxia Road, Qingdao University, Qingdao, China, 266071
| | - Qifeng Yin
- Department of Genetics and Cell Biology, Basic medical college, 308 Ningxia Road, Qingdao University, Qingdao, China, 266071
| | - Guoxiang Liu
- Department of Genetics and Cell Biology, Basic medical college, 308 Ningxia Road, Qingdao University, Qingdao, China, 266071
| | - Huihui Liu
- Department of Genetics and Cell Biology, Basic medical college, 308 Ningxia Road, Qingdao University, Qingdao, China, 266071
| | - Yajing Huang
- Basic medical college, 308 Ningxia Road, Qingdao University, Qingdao, China, 266071
| | - Bing Li
- Department of Genetics and Cell Biology, Basic medical college, 308 Ningxia Road, Qingdao University, Qingdao, China, 266071
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131
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Direct single-molecule measurements of phycocyanobilin photophysics in monomeric C-phycocyanin. Proc Natl Acad Sci U S A 2017; 114:9779-9784. [PMID: 28847963 DOI: 10.1073/pnas.1705435114] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Phycobilisomes are highly organized pigment-protein antenna complexes found in the photosynthetic apparatus of cyanobacteria and rhodophyta that harvest solar energy and transport it to the reaction center. A detailed bottom-up model of pigment organization and energy transfer in phycobilisomes is essential to understanding photosynthesis in these organisms and informing rational design of artificial light-harvesting systems. In particular, heterogeneous photophysical behaviors of these proteins, which cannot be predicted de novo, may play an essential role in rapid light adaptation and photoprotection. Furthermore, the delicate architecture of these pigment-protein scaffolds sensitizes them to external perturbations, for example, surface attachment, which can be avoided by study in free solution or in vivo. Here, we present single-molecule characterization of C-phycocyanin (C-PC), a three-pigment biliprotein that self-assembles to form the midantenna rods of cyanobacterial phycobilisomes. Using the Anti-Brownian Electrokinetic (ABEL) trap to counteract Brownian motion of single particles in real time, we directly monitor the changing photophysical states of individual C-PC monomers from Spirulina platensis in free solution by simultaneous readout of their brightness, fluorescence anisotropy, fluorescence lifetime, and emission spectra. These include single-chromophore emission states for each of the three covalently bound phycocyanobilins, providing direct measurements of the spectra and photophysics of these chemically identical molecules in their native protein environment. We further show that a simple Förster resonant energy transfer (FRET) network model accurately predicts the observed photophysical states of C-PC and suggests highly variable quenching behavior of one of the chromophores, which should inform future studies of higher-order complexes.
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132
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Light harvesting in phototrophic bacteria: structure and function. Biochem J 2017; 474:2107-2131. [DOI: 10.1042/bcj20160753] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 04/03/2017] [Accepted: 04/06/2017] [Indexed: 12/23/2022]
Abstract
This review serves as an introduction to the variety of light-harvesting (LH) structures present in phototrophic prokaryotes. It provides an overview of the LH complexes of purple bacteria, green sulfur bacteria (GSB), acidobacteria, filamentous anoxygenic phototrophs (FAP), and cyanobacteria. Bacteria have adapted their LH systems for efficient operation under a multitude of different habitats and light qualities, performing both oxygenic (oxygen-evolving) and anoxygenic (non-oxygen-evolving) photosynthesis. For each LH system, emphasis is placed on the overall architecture of the pigment–protein complex, as well as any relevant information on energy transfer rates and pathways. This review addresses also some of the more recent findings in the field, such as the structure of the CsmA chlorosome baseplate and the whole-cell kinetics of energy transfer in GSB, while also pointing out some areas in need of further investigation.
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133
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Nganou C, Lackner G, Teschome B, Deen MJ, Adir N, Pouhe D, Lupascu DC, Mkandawire M. Energy Transfer Kinetics in Photosynthesis as an Inspiration for Improving Organic Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2017; 9:19030-19039. [PMID: 28497947 DOI: 10.1021/acsami.7b04028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Clues to designing highly efficient organic solar cells may lie in understanding the architecture of light-harvesting systems and exciton energy transfer (EET) processes in very efficient photosynthetic organisms. Here, we compare the kinetics of excitation energy tunnelling from the intact phycobilisome (PBS) light-harvesting antenna system to the reaction center in photosystem II in intact cells of the cyanobacterium Acaryochloris marina with the charge transfer after conversion of photons into photocurrent in vertically aligned carbon nanotube (va-CNT) organic solar cells with poly(3-hexyl)thiophene (P3HT) as the pigment. We find that the kinetics in electron hole creation following excitation at 600 nm in both PBS and va-CNT solar cells to be 450 and 500 fs, respectively. The EET process has a 3 and 14 ps pathway in the PBS, while in va-CNT solar cell devices, the charge trapping in the CNT takes 11 and 258 ps. We show that the main hindrance to efficiency of va-CNT organic solar cells is the slow migration of the charges after exciton formation.
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Affiliation(s)
- Collins Nganou
- Verschuren Centre for Sustainability in Energy and the Environment, Cape Breton University , 1250 Grand Lake Road, Sydney, Nova Scotia B1P 6L2, Canada
| | - Gerhard Lackner
- Institute for Materials Science, University of Duisburg-Essen and Centre for Nanointegration Duisburg-Essen (CeNIDE) , Essen 45141, Germany
| | - Bezu Teschome
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf , 01328 Dresden, Germany
| | - M Jamal Deen
- Electrical and Computer Engineering, McMaster University , 1280 Main Street, West Hamilton, Ontario L8S 4K1, Canada
| | - Noam Adir
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology , Haifa, 32000 Israel
| | - David Pouhe
- Reutlingen University of Applied Sciences , Alteburgstrase 150, 72762 Reutlingen, Germany
| | - Doru C Lupascu
- Institute for Materials Science, University of Duisburg-Essen and Centre for Nanointegration Duisburg-Essen (CeNIDE) , Essen 45141, Germany
| | - Martin Mkandawire
- Verschuren Centre for Sustainability in Energy and the Environment, Cape Breton University , 1250 Grand Lake Road, Sydney, Nova Scotia B1P 6L2, Canada
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134
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Dagnino-Leone J, Figueroa M, Mella C, Vorphal MA, Kerff F, Vásquez AJ, Bunster M, Martínez-Oyanedel J. Structural models of the different trimers present in the core of phycobilisomes from Gracilaria chilensis based on crystal structures and sequences. PLoS One 2017; 12:e0177540. [PMID: 28542288 PMCID: PMC5436742 DOI: 10.1371/journal.pone.0177540] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 04/28/2017] [Indexed: 11/25/2022] Open
Abstract
Phycobilisomes (PBS) are accessory light harvesting protein complexes that directionally transfer energy towards photosystems. Phycobilisomes are organized in a central core and rods radiating from it. Components of phycobilisomes in Gracilaria chilensis (Gch) are Phycobiliproteins (PBPs), Phycoerythrin (PE), and Phycocyanin (PC) in the rods, while Allophycocyanin (APC) is found in the core, and linker proteins (L). The function of such complexes depends on the structure of each component and their interaction. The core of PBS from cyanobacteria is mainly composed by cylinders of trimers of α and β subunits forming heterodimers of Allophycocyanin, and other components of the core including subunits αII and β18. As for the linkers, Linker core (LC) and Linker core membrane (LCM) are essential for the final emission towards photoreaction centers. Since we have previously focused our studies on the rods of the PBS, in the present article we investigated the components of the core in the phycobilisome from the eukaryotic algae, Gracilaria chilensis and their organization into trimers. Transmission electron microscopy provided the information for a three cylinders core, while the three dimensional structure of Allophycocyanin purified from Gch was determined by X-ray diffraction method and the biological unit was determined as a trimer by size exclusion chromatography. The protein sequences of all the components of the core were obtained by sequencing the corresponding genes and their expression confirmed by transcriptomic analysis. These subunits have seldom been reported in red algae, but not in Gracilaria chilensis. The subunits not present in the crystallographic structure were modeled to build the different composition of trimers. This article proposes structural models for the different types of trimers present in the core of phycobilisomes of Gch as a first step towards the final model for energy transfer in this system.
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Affiliation(s)
- Jorge Dagnino-Leone
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Maximiliano Figueroa
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Claudia Mella
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - María Alejandra Vorphal
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Frédéric Kerff
- Centre d'Ingéniérie des Protéines, Université de Liège, Liège, Belgium
| | - Aleikar José Vásquez
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Marta Bunster
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - José Martínez-Oyanedel
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
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135
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Nguyen AY, Bricker WP, Zhang H, Weisz DA, Gross ML, Pakrasi HB. The proteolysis adaptor, NblA, binds to the N-terminus of β-phycocyanin: Implications for the mechanism of phycobilisome degradation. PHOTOSYNTHESIS RESEARCH 2017; 132:95-106. [PMID: 28078551 PMCID: PMC5576716 DOI: 10.1007/s11120-016-0334-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 12/27/2016] [Indexed: 06/06/2023]
Abstract
Phycobilisome (PBS) complexes are massive light-harvesting apparati in cyanobacteria that capture and funnel light energy to the photosystem. PBS complexes are dynamically degraded during nutrient deprivation, which causes severe chlorosis, and resynthesized during nutrient repletion. PBS degradation occurs rapidly after nutrient step down, and is specifically triggered by non-bleaching protein A (NblA), a small proteolysis adaptor that facilitates interactions between a Clp chaperone and phycobiliproteins. Little is known about the mode of action of NblA during PBS degradation. In this study, we used chemical cross-linking coupled with LC-MS/MS to investigate the interactions between NblA and phycobiliproteins. An isotopically coded BS3 cross-linker captured a protein interaction between NblA and β-phycocyanin (PC). LC-MS/MS analysis identified the amino acid residues participating in the binding reaction, and demonstrated that K52 in NblA is cross-linked to T2 in β-PC. These results were modeled onto the existing crystal structures of NblA and PC by protein docking simulations. Our data indicate that the C-terminus of NblA fits in an open groove of β-PC, a region located inside the central hollow cavity of a PC rod. NblA may mediate PBS degradation by disrupting the structural integrity of the PC rod from within the rod. In addition, M1-K44 and M1-K52 cross-links between the N-terminus of NblA and the C-terminus of NblA are consistent with the NblA crystal structure, confirming that the purified NblA is structurally and biologically relevant. These findings provide direct evidence that NblA physically interacts with β-PC.
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Affiliation(s)
- Amelia Y Nguyen
- Department of Biology, Washington University, Campus Box 1095, One Brookings Drive, St. Louis, MO, 63130-4899, USA
- US Environmental Protection Agency, 1200 Pennsylvania Ave, NW (MC-7403M), Washington, DC, 20460, USA
| | - William P Bricker
- Laboratory for Computational Biology & Biophysics, Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Hao Zhang
- Department of Chemistry, Washington University, St. Louis, MO, 63130, USA
| | - Daniel A Weisz
- Department of Biology, Washington University, Campus Box 1095, One Brookings Drive, St. Louis, MO, 63130-4899, USA
- Department of Chemistry, Washington University, St. Louis, MO, 63130, USA
| | - Michael L Gross
- Department of Chemistry, Washington University, St. Louis, MO, 63130, USA
| | - Himadri B Pakrasi
- Department of Biology, Washington University, Campus Box 1095, One Brookings Drive, St. Louis, MO, 63130-4899, USA.
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136
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Su HN, Wang QM, Li CY, Li K, Luo W, Chen B, Zhang XY, Qin QL, Zhou BC, Chen XL, Zhang YZ, Xie BB. Structural insights into the cold adaptation of the photosynthetic pigment-protein C-phycocyanin from an Arctic cyanobacterium. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2017; 1858:325-335. [DOI: 10.1016/j.bbabio.2017.02.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 01/26/2017] [Accepted: 02/06/2017] [Indexed: 10/20/2022]
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137
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Thurotte A, Bourcier de Carbon C, Wilson A, Talbot L, Cot S, López-Igual R, Kirilovsky D. The cyanobacterial Fluorescence Recovery Protein has two distinct activities: Orange Carotenoid Protein amino acids involved in FRP interaction. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2017; 1858:308-317. [PMID: 28188781 DOI: 10.1016/j.bbabio.2017.02.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 01/17/2017] [Accepted: 02/05/2017] [Indexed: 12/21/2022]
Abstract
To deal with fluctuating light condition, cyanobacteria have developed a photoprotective mechanism which, under high light conditions, decreases the energy arriving at the photochemical centers. It relies on a photoswitch, the Orange Carotenoid Protein (OCP). Once photoactivated, OCP binds to the light harvesting antenna, the phycobilisome (PBS), and triggers the thermal dissipation of the excess energy absorbed. Deactivation of the photoprotective mechanism requires the intervention of a third partner, the Fluorescence Recovery Protein (FRP). FRP by interacting with the photoactivated OCP accelerates its conversion to the non-active form and its detachment from the phycobilisome. We have studied the interaction of FRP with free and phycobilisome-bound OCP. Several OCP variants were constructed and characterized. In this article we show that OCP amino acid F299 is essential and D220 important for OCP deactivation mediated by FRP. Mutations of these amino acids did not affect FRP activity as helper to detach OCP from phycobilisomes. In addition, while mutated R60L FRP is inactive on OCP deactivation, its activity on the detachment of the OCP from the phycobilisomes is not affected. Thus, our results demonstrate that FRP has two distinct activities: it accelerates OCP detachment from phycobilisomes and then it helps deactivation of the OCP. They also suggest that different OCP and FRP amino acids could be involved in these two activities.
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Affiliation(s)
- Adrien Thurotte
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Université Paris-Sud, Université Paris-Saclay, 91198 Gif sur Yvette, France; Institut de Biologie et Technologies de Saclay (iBiTec-S), Commissariat à l'Energie Atomique (CEA), 91191 Gif-sur-Yvette, France
| | - Céline Bourcier de Carbon
- Institut de Biologie et Technologies de Saclay (iBiTec-S), Commissariat à l'Energie Atomique (CEA), 91191 Gif-sur-Yvette, France; Phycosource, 13 boulevard de l'Hautil, 95092 Cergy Cedex, France
| | - Adjélé Wilson
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Université Paris-Sud, Université Paris-Saclay, 91198 Gif sur Yvette, France; Institut de Biologie et Technologies de Saclay (iBiTec-S), Commissariat à l'Energie Atomique (CEA), 91191 Gif-sur-Yvette, France
| | - Léa Talbot
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Université Paris-Sud, Université Paris-Saclay, 91198 Gif sur Yvette, France; Institut de Biologie et Technologies de Saclay (iBiTec-S), Commissariat à l'Energie Atomique (CEA), 91191 Gif-sur-Yvette, France
| | - Sandrine Cot
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Université Paris-Sud, Université Paris-Saclay, 91198 Gif sur Yvette, France; Institut de Biologie et Technologies de Saclay (iBiTec-S), Commissariat à l'Energie Atomique (CEA), 91191 Gif-sur-Yvette, France
| | - Rocio López-Igual
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Université Paris-Sud, Université Paris-Saclay, 91198 Gif sur Yvette, France; Institut de Biologie et Technologies de Saclay (iBiTec-S), Commissariat à l'Energie Atomique (CEA), 91191 Gif-sur-Yvette, France
| | - Diana Kirilovsky
- Institute for Integrative Biology of the Cell (I2BC), CNRS, CEA, Université Paris-Sud, Université Paris-Saclay, 91198 Gif sur Yvette, France; Institut de Biologie et Technologies de Saclay (iBiTec-S), Commissariat à l'Energie Atomique (CEA), 91191 Gif-sur-Yvette, France.
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138
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Eisenberg I, Caycedo-Soler F, Harris D, Yochelis S, Huelga SF, Plenio MB, Adir N, Keren N, Paltiel Y. Regulating the Energy Flow in a Cyanobacterial Light-Harvesting Antenna Complex. J Phys Chem B 2017; 121:1240-1247. [DOI: 10.1021/acs.jpcb.6b10590] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ido Eisenberg
- Applied
Physics Department and The Center for Nano-Science and Nano-Technology, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Felipe Caycedo-Soler
- Institute
of Theoretical Physics, Ulm University, Albert Einstein Alle 11, 89069 Ulm, Germany
| | - Dvir Harris
- Schulich
Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 32000, Israel
| | - Shira Yochelis
- Applied
Physics Department and The Center for Nano-Science and Nano-Technology, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Susana F. Huelga
- Institute
of Theoretical Physics, Ulm University, Albert Einstein Alle 11, 89069 Ulm, Germany
| | - Martin B. Plenio
- Institute
of Theoretical Physics, Ulm University, Albert Einstein Alle 11, 89069 Ulm, Germany
| | - Noam Adir
- Schulich
Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 32000, Israel
| | - Nir Keren
- Department
of Plant and Environmental Sciences, Alexander Silberman Institute
of Life Sciences, The Hebrew University of Jerusalem, Givat Ram, Jerusalem 9190401, Israel
| | - Yossi Paltiel
- Applied
Physics Department and The Center for Nano-Science and Nano-Technology, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
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139
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Huang X, Zang X, Wu F, Jin Y, Wang H, Liu C, Ding Y, He B, Xiao D, Song X, Liu Z. Transcriptome Sequencing of Gracilariopsis lemaneiformis to Analyze the Genes Related to Optically Active Phycoerythrin Synthesis. PLoS One 2017; 12:e0170855. [PMID: 28135287 PMCID: PMC5279760 DOI: 10.1371/journal.pone.0170855] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 01/11/2017] [Indexed: 11/18/2022] Open
Abstract
Gracilariopsis lemaneiformis (aka Gracilaria lemaneiformis) is a red macroalga rich in phycoerythrin, which can capture light efficiently and transfer it to photosystemⅡ. However, little is known about the synthesis of optically active phycoerythrinin in G. lemaneiformis at the molecular level. With the advent of high-throughput sequencing technology, analysis of genetic information for G. lemaneiformis by transcriptome sequencing is an effective means to get a deeper insight into the molecular mechanism of phycoerythrin synthesis. Illumina technology was employed to sequence the transcriptome of two strains of G. lemaneiformis- the wild type and a green-pigmented mutant. We obtained a total of 86915 assembled unigenes as a reference gene set, and 42884 unigenes were annotated in at least one public database. Taking the above transcriptome sequencing as a reference gene set, 4041 differentially expressed genes were screened to analyze and compare the gene expression profiles of the wild type and green mutant. By GO and KEGG pathway analysis, we concluded that three factors, including a reduction in the expression level of apo-phycoerythrin, an increase of chlorophyll light-harvesting complex synthesis, and reduction of phycoerythrobilin by competitive inhibition, caused the reduction of optically active phycoerythrin in the green-pigmented mutant.
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Affiliation(s)
- Xiaoyun Huang
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, Qingdao, Shandong, China
| | - Xiaonan Zang
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, Qingdao, Shandong, China
- * E-mail:
| | - Fei Wu
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, Qingdao, Shandong, China
| | - Yuming Jin
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, Qingdao, Shandong, China
| | - Haitao Wang
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, Qingdao, Shandong, China
| | - Chang Liu
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, Qingdao, Shandong, China
| | - Yating Ding
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, Qingdao, Shandong, China
| | - Bangxiang He
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, Qingdao, Shandong, China
| | - Dongfang Xiao
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, Qingdao, Shandong, China
| | - Xinwei Song
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, Qingdao, Shandong, China
| | - Zhu Liu
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, Qingdao, Shandong, China
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140
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Esquivel-Hernández DA, Rodríguez-Rodríguez J, Rostro-Alanis M, Cuéllar-Bermúdez SP, Mancera-Andrade EI, Núñez-Echevarría JE, García-Pérez JS, Chandra R, Parra-Saldívar R. Advancement of green process through microwave-assisted extraction of bioactive metabolites from Arthrospira Platensis and bioactivity evaluation. BIORESOURCE TECHNOLOGY 2017; 224:618-629. [PMID: 27838319 DOI: 10.1016/j.biortech.2016.10.061] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 10/19/2016] [Accepted: 10/20/2016] [Indexed: 06/06/2023]
Abstract
Bioactivity and functional properties of cyanobacterial extract mostly depends on process of extraction, temperature and solvent used (polar or non-polar). To evaluate these parameters a design of experiment (DOE; using a 2k design) was performed with Arthrospira platensis. Extraction process was optimized through microwave-assisted extraction considering solvent ratio, temperature and time of extraction with polar (PS) and non-polar (NPS). Maximum extract yield obtained was 4.32±0.25% and 5.26±0.11% (w/w) respectively for PS and NPS. Maximum content of bioactive metabolites in PS extracts were thiamine (846.57±14.12μg/g), riboflavin (101.09±1.63μg/g), C-phycocyanin (2.28±0.10μg/g) and A-phycocyanin (4.11±0.03μg/g), while for NPS extracts were α-tocopherol (37.86±0.78μg/g), β-carotene (123.64±1.45μg/g) and 19.44±0.21mg/g of fatty acids. A. platensis PS extracts showed high antimicrobial activity and PS extracts had antioxidant activity of 0.79±0.12μmolTE/g for FRAP assay, while for NPS extracts 1.03±0.08μmol α-TE/g for FRAP assay.
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Affiliation(s)
- Diego A Esquivel-Hernández
- Tecnologico de Monterrey, Escuela Nacional de Ciencias, Ingenieria y Tecnologia, Campus Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey, N.L. 64849, Mexico
| | - José Rodríguez-Rodríguez
- Tecnologico de Monterrey, Escuela Nacional de Ciencias, Ingenieria y Tecnologia, Campus Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey, N.L. 64849, Mexico
| | - Magdalena Rostro-Alanis
- Tecnologico de Monterrey, Escuela Nacional de Ciencias, Ingenieria y Tecnologia, Campus Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey, N.L. 64849, Mexico
| | | | - Elena I Mancera-Andrade
- Tecnologico de Monterrey, Escuela Nacional de Ciencias, Ingenieria y Tecnologia, Campus Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey, N.L. 64849, Mexico
| | - Jade E Núñez-Echevarría
- Tecnologia Ambiental Biomex S.A. de C.V., Volcan Jorullo 5268, Zapopan, Jalisco 45070, Mexico
| | - J Saúl García-Pérez
- Tecnologico de Monterrey, Escuela Nacional de Ciencias, Ingenieria y Tecnologia, Campus Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey, N.L. 64849, Mexico
| | - Rashmi Chandra
- Tecnologico de Monterrey, Escuela Nacional de Ciencias, Ingenieria y Tecnologia, Campus Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey, N.L. 64849, Mexico
| | - Roberto Parra-Saldívar
- Tecnologico de Monterrey, Escuela Nacional de Ciencias, Ingenieria y Tecnologia, Campus Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey, N.L. 64849, Mexico.
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141
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Kirilovsky D, Kerfeld CA. Cyanobacterial photoprotection by the orange carotenoid protein. NATURE PLANTS 2016; 2:16180. [PMID: 27909300 DOI: 10.1038/nplants.2016.180] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 10/20/2016] [Indexed: 05/18/2023]
Abstract
In photosynthetic organisms, the production of dangerous oxygen species is stimulated under high irradiance. To cope with this stress, these organisms have evolved photoprotective mechanisms. One type of mechanism functions to decrease the energy arriving at the photochemical centres by increasing thermal dissipation at the level of antennae. In cyanobacteria, the trigger for this mechanism is the photoactivation of a soluble carotenoid protein, the orange carotenoid protein (OCP), which is a structurally and functionally modular protein. The inactive orange form (OCPo) is compact and globular, with the carotenoid spanning the effector and the regulatory domains. In the active red form (OCPr), the two domains are completely separated and the carotenoid has translocated entirely into the effector domain. The activated OCPr interacts with the phycobilisome (PBS), the cyanobacterial antenna, and induces excitation-energy quenching. A second protein, the fluorescence recovery protein (FRP), dislodges the active OCPr from the PBSs and accelerates its conversion to the inactive OCP.
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Affiliation(s)
- Diana Kirilovsky
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette, France
- Institut de Biologie et Technologies de Saclay (iBiTec-S), Commissariat à l'Energie Atomique (CEA), 91191 Gif-sur-Yvette, France
| | - Cheryl A Kerfeld
- MSU-DOE Plant Research Laboratory and Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Berkeley Synthetic Biology Institute, Berkeley, California 94720, USA
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142
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Vajravel S, Kovács L, Kis M, Rehman AU, Vass I, Gombos Z, Toth TN. β-Carotene influences the phycobilisome antenna of cyanobacterium Synechocystis sp. PCC 6803. PHOTOSYNTHESIS RESEARCH 2016; 130:403-415. [PMID: 27165097 DOI: 10.1007/s11120-016-0273-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Accepted: 05/01/2016] [Indexed: 06/05/2023]
Abstract
We investigated the relation between the carotenoid composition and the structure of phycobilisome (PBS) antenna of cyanobacterium Synechocystis sp. PCC 6803. PBS is a large soluble protein complex enhances the light harvesting efficiency of the cells. It is composed of a central allophycocyanin core and radial phycocyanin rods, but it does not contain carotenoids. However, the absence or low level of carotenoids were previously shown to lead the co-existence of unconnected rod units and assembled PBS with shorter peripheral rods. Here we show that the lack of β-carotene, but not of xanthophylls or the distortion of photosystem structure, evoked unconnected rods. Thus, these essential β-carotene molecules are not bound by Photosystem I or Photosystem II. Our results do not show correlation between the reactive oxygen species (ROS) and PBS distortion despite the higher singlet oxygen producing capacity and light sensitivity of the mutant cells. Reduced cellular level of those linker proteins attaching the rod units together was also observed, but the direct damage of the linkers by ROS are not supported by our data. Enzymatic PBS proteolysis induced by nitrogen starvation in carotenoid mutant cells revealed a retarded degradation of the unconnected rod units.
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Affiliation(s)
- Sindhujaa Vajravel
- Institute of Plant Biology, Biological Research Centre, Hungarian Academy of Sciences, P.O. Box 521, Szeged, 6701, Hungary
| | - László Kovács
- Institute of Plant Biology, Biological Research Centre, Hungarian Academy of Sciences, P.O. Box 521, Szeged, 6701, Hungary
| | - Mihály Kis
- Institute of Plant Biology, Biological Research Centre, Hungarian Academy of Sciences, P.O. Box 521, Szeged, 6701, Hungary
| | - Ateeq Ur Rehman
- Institute of Plant Biology, Biological Research Centre, Hungarian Academy of Sciences, P.O. Box 521, Szeged, 6701, Hungary
| | - Imre Vass
- Institute of Plant Biology, Biological Research Centre, Hungarian Academy of Sciences, P.O. Box 521, Szeged, 6701, Hungary
| | - Zoltan Gombos
- Institute of Plant Biology, Biological Research Centre, Hungarian Academy of Sciences, P.O. Box 521, Szeged, 6701, Hungary
| | - Tunde N Toth
- Institute of Plant Biology, Biological Research Centre, Hungarian Academy of Sciences, P.O. Box 521, Szeged, 6701, Hungary.
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143
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Heddam S. Multilayer perceptron neural network-based approach for modeling phycocyanin pigment concentrations: case study from lower Charles River buoy, USA. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:17210-17225. [PMID: 27221462 DOI: 10.1007/s11356-016-6905-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2016] [Accepted: 05/16/2016] [Indexed: 06/05/2023]
Abstract
This paper proposes multilayer perceptron neural network (MLPNN) to predict phycocyanin (PC) pigment using water quality variables as predictor. In the proposed model, four water quality variables that are water temperature, dissolved oxygen, pH, and specific conductance were selected as the inputs for the MLPNN model, and the PC as the output. To demonstrate the capability and the usefulness of the MLPNN model, a total of 15,849 data measured at 15-min (15 min) intervals of time are used for the development of the model. The data are collected at the lower Charles River buoy, and available from the US Environmental Protection Agency (USEPA). For comparison purposes, a multiple linear regression (MLR) model that was frequently used for predicting water quality variables in previous studies is also built. The performances of the models are evaluated using a set of widely used statistical indices. The performance of the MLPNN and MLR models is compared with the measured data. The obtained results show that (i) the all proposed MLPNN models are more accurate than the MLR models and (ii) the results obtained are very promising and encouraging for the development of phycocyanin-predictive models.
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Affiliation(s)
- Salim Heddam
- Faculty of Science, Agronomy Department, Hydraulics Division University, 20 Août 1955, Route EL Hadaik, BP 26, Skikda, Algeria.
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144
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Gomaa M, Al-Haj L, Abed R. Metabolic engineering of Cyanobacteria and microalgae for enhanced production of biofuels and high-value products. J Appl Microbiol 2016; 121:919-31. [DOI: 10.1111/jam.13232] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 05/25/2016] [Accepted: 07/07/2016] [Indexed: 01/26/2023]
Affiliation(s)
- M.A. Gomaa
- Biology Department; College of Science; Sultan Qaboos University; Al Khoud Sultanate of Oman
| | - L. Al-Haj
- Biology Department; College of Science; Sultan Qaboos University; Al Khoud Sultanate of Oman
| | - R.M.M. Abed
- Biology Department; College of Science; Sultan Qaboos University; Al Khoud Sultanate of Oman
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145
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Mirkovic T, Ostroumov EE, Anna JM, van Grondelle R, Govindjee, Scholes GD. Light Absorption and Energy Transfer in the Antenna Complexes of Photosynthetic Organisms. Chem Rev 2016; 117:249-293. [PMID: 27428615 DOI: 10.1021/acs.chemrev.6b00002] [Citation(s) in RCA: 599] [Impact Index Per Article: 74.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The process of photosynthesis is initiated by the capture of sunlight by a network of light-absorbing molecules (chromophores), which are also responsible for the subsequent funneling of the excitation energy to the reaction centers. Through evolution, genetic drift, and speciation, photosynthetic organisms have discovered many solutions for light harvesting. In this review, we describe the underlying photophysical principles by which this energy is absorbed, as well as the mechanisms of electronic excitation energy transfer (EET). First, optical properties of the individual pigment chromophores present in light-harvesting antenna complexes are introduced, and then we examine the collective behavior of pigment-pigment and pigment-protein interactions. The description of energy transfer, in particular multichromophoric antenna structures, is shown to vary depending on the spatial and energetic landscape, which dictates the relative coupling strength between constituent pigment molecules. In the latter half of the article, we focus on the light-harvesting complexes of purple bacteria as a model to illustrate the present understanding of the synergetic effects leading to EET optimization of light-harvesting antenna systems while exploring the structure and function of the integral chromophores. We end this review with a brief overview of the energy-transfer dynamics and pathways in the light-harvesting antennas of various photosynthetic organisms.
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Affiliation(s)
- Tihana Mirkovic
- Department of Chemistry, University of Toronto , 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Evgeny E Ostroumov
- Department of Chemistry, Princeton University , Washington Road, Princeton, New Jersey 08544, United States
| | - Jessica M Anna
- Department of Chemistry, University of Pennsylvania , 231 S. 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Rienk van Grondelle
- Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam , De Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands
| | - Govindjee
- Department of Biochemistry, Center of Biophysics & Quantitative Biology, and Department of Plant Biology, University of Illinois at Urbana-Champaign , 265 Morrill Hall, 505 South Goodwin Avenue, Urbana, Illinois 61801, United States
| | - Gregory D Scholes
- Department of Chemistry, University of Toronto , 80 St. George Street, Toronto, Ontario M5S 3H6, Canada.,Department of Chemistry, Princeton University , Washington Road, Princeton, New Jersey 08544, United States
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146
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Senge MO, MacGowan SA, O'Brien JM. Conformational control of cofactors in nature - the influence of protein-induced macrocycle distortion on the biological function of tetrapyrroles. Chem Commun (Camb) 2016; 51:17031-63. [PMID: 26482230 DOI: 10.1039/c5cc06254c] [Citation(s) in RCA: 135] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Tetrapyrrole-containing proteins are one of the most fundamental classes of enzymes in nature and it remains an open question to give a chemical rationale for the multitude of biological reactions that can be catalyzed by these pigment-protein complexes. There are many fundamental processes where the same (i.e., chemically identical) porphyrin cofactor is involved in chemically quite distinct reactions. For example, heme is the active cofactor for oxygen transport and storage (hemoglobin, myoglobin) and for the incorporation of molecular oxygen in organic substrates (cytochrome P450). It is involved in the terminal oxidation (cytochrome c oxidase) and the metabolism of H2O2 (catalases and peroxidases) and catalyzes various electron transfer reactions in cytochromes. Likewise, in photosynthesis the same chlorophyll cofactor may function as a reaction center pigment (charge separation) or as an accessory pigment (exciton transfer) in light harvesting complexes (e.g., chlorophyll a). Whilst differences in the apoprotein sequences alone cannot explain the often drastic differences in physicochemical properties encountered for the same cofactor in diverse protein complexes, a critical factor for all biological functions must be the close structural interplay between bound cofactors and the respective apoprotein in addition to factors such as hydrogen bonding or electronic effects. Here, we explore how nature can use the same chemical molecule as a cofactor for chemically distinct reactions using the concept of conformational flexibility of tetrapyrroles. The multifaceted roles of tetrapyrroles are discussed in the context of the current knowledge on distorted porphyrins. Contemporary analytical methods now allow a more quantitative look at cofactors in protein complexes and the development of the field is illustrated by case studies on hemeproteins and photosynthetic complexes. Specific tetrapyrrole conformations are now used to prepare bioengineered designer proteins with specific catalytic or photochemical properties.
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Affiliation(s)
- Mathias O Senge
- School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, 152-160 Pearse Street, Dublin 2, Ireland and Medicinal Chemistry, Institute of Molecular Medicine, Trinity Centre for Health Sciences, Trinity College Dublin, St. James's Hospital, Dublin 8, Ireland.
| | - Stuart A MacGowan
- School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, 152-160 Pearse Street, Dublin 2, Ireland
| | - Jessica M O'Brien
- Medicinal Chemistry, Institute of Molecular Medicine, Trinity Centre for Health Sciences, Trinity College Dublin, St. James's Hospital, Dublin 8, Ireland.
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147
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Tang Z, Jilu Zhao, Ju B, Li W, Wen S, Pu Y, Qin S. One-step chromatographic procedure for purification of B-phycoerythrin from Porphyridium cruentum. Protein Expr Purif 2016; 123:70-4. [PMID: 26851659 DOI: 10.1016/j.pep.2016.01.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 01/26/2016] [Accepted: 01/29/2016] [Indexed: 02/08/2023]
Abstract
B-phycoerythrin (B-PE) was separated and purified from microalga Porphyridium cruentum using one-step chromatographic method. Phycobiliproteins in P. cruentum was extracted by osmotic shock and initially purified by ultrafiltration. Further purification was carried out with a SOURCE 15Q exchange column and analytical grade B-PE was obtained with a purity ratio (A545/A280) of 5.1 and a yield of 68.5%. It showed a double absorption peaks at 545 nm and 565 nm and a shoulder peak at 498 nm, and displayed a fluorescence emission maximum at 580 nm. The analysis by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) showed a bulky band between 18 and 20 kDa which could be assigned to subunits α and β and a low intensity band of 27 kDa assigned to γ subunit. Our protocol provides attractive alternative to consider for the purification procedure to obtain analytical grade B-PE at commercial level.
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Affiliation(s)
- Zhihong Tang
- College of Life Science, Yantai University, 30 Qingquan Street, Yantai 264005, China.
| | - Jilu Zhao
- College of Life Science, Yantai University, 30 Qingquan Street, Yantai 264005, China
| | - Bao Ju
- College of Life Science, Yantai University, 30 Qingquan Street, Yantai 264005, China
| | - Wenjun Li
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 17 Chunhui Street, Yantai 264003, China
| | - Shaohong Wen
- College of Life Science, Yantai University, 30 Qingquan Street, Yantai 264005, China
| | - Yang Pu
- College of Agriculture, Ludong University, 186 Hongqizhong Street, Yantai 264025, China
| | - Song Qin
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 17 Chunhui Street, Yantai 264003, China
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148
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Malairaj S, Muthu S, Gopal VB, Perumal P, Ramasamy R. Qualitative and quantitative determination of R-phycoerythrin from Halymenia floresia (Clemente) C. Agardh by polyacrylamide gel using electrophoretic elution technique. J Chromatogr A 2016; 1454:120-6. [DOI: 10.1016/j.chroma.2016.05.063] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 05/14/2016] [Accepted: 05/19/2016] [Indexed: 10/21/2022]
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149
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Kumar V, Sonani RR, Sharma M, Gupta GD, Madamwar D. Crystal structure analysis of C-phycoerythrin from marine cyanobacterium Phormidium sp. A09DM. PHOTOSYNTHESIS RESEARCH 2016; 129:17-28. [PMID: 27068646 DOI: 10.1007/s11120-016-0259-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 03/31/2016] [Indexed: 05/22/2023]
Abstract
The role of unique sequence features of C-phycoerythrin, isolated from Phormidium sp. A09DM, has been investigated by crystallographic studies. Two conserved indels (i.e. inserts or deletions) are found in the β-subunit of Phormidium phycoerythrin that are distinctive characteristics of large number of cyanobacterial sequences. The identified signatures are a two-residue deletion from position 21 and a nine-residue insertion at position 146. Crystals of Phormidium phycoerythrin were obtained at pH values of 5 and 8.5, and structures have been resolved to high precision at 1.95 and 2.1 Å resolution, respectively. In both the structures, heterodimers of α- and β- subunits assemble as hexamers. The 7-residue insertion at position 146 significantly reduces solvent exposure of π-conjugated A-C rings of a phycoerythrobilin (PEB) chromophore, and can influence energy absorption and energy transfer characteristics. The structural analyses (with 12-fold redundancy) suggest that protein micro-environment alone dictates the conformation of bound chromophores. The low- and high-energy absorbing chromophores are identified based on A-B ring coplanarity. The spatial distribution of these is found to be similar to that observed in R-phycoerythrin, suggesting the direction of energy transfer from outer-surface of hexamer to inner-hollow cavity in the Phormidium protein. The crystal structures also reveal that a commonly observed Hydrogen-bonding network in phycobiliproteins, involving chromophore bound to α-subunit and amino acid at position 73 of β-subunit, may not be essential for structural and functional integrity of C-phycoerythrin orthologs. In solution, the protein displays slight red shift and decrease in fluorescence emission at acidic pH. The mechanism for which may be static and correlates with the proximity of +ve electric field of Arg148 to the C-ring of a PEB chromophore.
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Affiliation(s)
- Vinay Kumar
- Protein Crystallography Section, Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.
| | - Ravi R Sonani
- BRD School of Biosciences, Sardar Patel University, Vadtal Road, Satellite Campus, Post Box No-39, Vallabh Vidyanagar, 388120, India
| | - Mahima Sharma
- Protein Crystallography Section, Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Gagan D Gupta
- Protein Crystallography Section, Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Datta Madamwar
- BRD School of Biosciences, Sardar Patel University, Vadtal Road, Satellite Campus, Post Box No-39, Vallabh Vidyanagar, 388120, India.
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150
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Wu HL, Wang GH, Xiang WZ, Li T, He H. Stability and Antioxidant Activity of Food-Grade Phycocyanin Isolated from Spirulina platensis. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2016. [DOI: 10.1080/10942912.2015.1038564] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Hua-Lian Wu
- Key Laboratory of Tropical Marine Bio-Resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - Guang-Hua Wang
- Key Laboratory of Tropical Marine Bio-Resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - Wen-Zhou Xiang
- Key Laboratory of Tropical Marine Bio-Resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - Tao Li
- Key Laboratory of Tropical Marine Bio-Resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - Hui He
- Key Laboratory of Tropical Marine Bio-Resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
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