A Bioelectrochemical Approach to Characterize Extracellular Electron Transfer by Synechocystis sp. PCC6803
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{"title"=>"A bioelectrochemical approach to characterize extracellular electron transfer by synechocystis sp. PCC6803", "type"=>"journal", "authors"=>[{"first_name"=>"Angelo", "last_name"=>"Cereda", "scopus_author_id"=>"56989530800"}, {"first_name"=>"Andrew", "last_name"=>"Hitchcock", "scopus_author_id"=>"36486330100"}, {"first_name"=>"Mark D.", "last_name"=>"Symes", "scopus_author_id"=>"23037157700"}, {"first_name"=>"Leroy", "last_name"=>"Cronin", "scopus_author_id"=>"7006149049"}, {"first_name"=>"Thomas S.", "last_name"=>"Bibby", "scopus_author_id"=>"6701537962"}, {"first_name"=>"Anne K.", "last_name"=>"Jones", "scopus_author_id"=>"55475849700"}], "year"=>2014, "source"=>"PLoS ONE", "identifiers"=>{"issn"=>"19326203", "pui"=>"372838504", "pmid"=>"24637387", "isbn"=>"1932-6203", "doi"=>"10.1371/journal.pone.0091484", "sgr"=>"84898636536", "scopus"=>"2-s2.0-84898636536"}, "id"=>"e6d021ec-017d-3880-883f-0ce05cbed4b5", "abstract"=>"Biophotovoltaic devices employ photosynthetic organisms at the anode of a microbial fuel cell to generate electrical power. Although a range of cyanobacteria and algae have been shown to generate photocurrent in devices of a multitude of architectures, mechanistic understanding of extracellular electron transfer by phototrophs remains minimal. Here we describe a mediatorless bioelectrochemical device to measure the electrogenic output of a planktonically grown cyanobacterium, Synechocystis sp. PCC6803. Light dependent production of current is measured, and its magnitude is shown to scale with microbial cell concentration and light intensity. Bioelectrochemical characterization of a Synechocystis mutant lacking Photosystem II demonstrates conclusively that production of the majority of photocurrent requires a functional water splitting aparatus and electrons are likely ultimately derived from water. This shows the potential of the device to rapidly and quantitatively characterize photocurrent production by genetically modified strains, an approach that can be used in future studies to delineate the mechanisms of cyanobacterial extracellular electron transport.", "link"=>"http://www.mendeley.com/research/bioelectrochemical-approach-characterize-extracellular-electron-transfer-synechocystis-sp-pcc6803", "reader_count"=>79, "reader_count_by_academic_status"=>{"Unspecified"=>3, "Professor > Associate Professor"=>4, "Researcher"=>15, "Student > Doctoral Student"=>4, "Student > Ph. D. Student"=>31, "Student > Postgraduate"=>4, "Student > Master"=>6, "Other"=>3, "Student > Bachelor"=>4, "Professor"=>5}, "reader_count_by_user_role"=>{"Unspecified"=>3, "Professor > Associate Professor"=>4, "Researcher"=>15, "Student > Doctoral Student"=>4, "Student > Ph. D. Student"=>31, "Student > Postgraduate"=>4, "Student > Master"=>6, "Other"=>3, "Student > Bachelor"=>4, "Professor"=>5}, "reader_count_by_subject_area"=>{"Unspecified"=>7, "Engineering"=>8, "Environmental Science"=>10, "Biochemistry, Genetics and Molecular Biology"=>8, "Agricultural and Biological Sciences"=>26, "Design"=>1, "Physics and Astronomy"=>2, "Chemical Engineering"=>2, "Chemistry"=>12, "Earth and Planetary Sciences"=>2, "Energy"=>1}, "reader_count_by_subdiscipline"=>{"Design"=>{"Design"=>1}, "Engineering"=>{"Engineering"=>8}, "Chemistry"=>{"Chemistry"=>12}, "Energy"=>{"Energy"=>1}, "Physics and Astronomy"=>{"Physics and Astronomy"=>2}, "Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>2}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>26}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>8}, "Unspecified"=>{"Unspecified"=>7}, "Environmental Science"=>{"Environmental Science"=>10}, "Chemical Engineering"=>{"Chemical Engineering"=>2}}, "reader_count_by_country"=>{"United States"=>2, "United Kingdom"=>4, "Italy"=>1}, "group_count"=>2}

Scopus | Further Information

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/1423417"], "description"=>"<p>(A) Photocurrent from wild type, Δ<i>psbB</i>, Δ<i>psbB</i><sub>WV</sub>, wild type with 100 µM DCMU in solution (+DCMUa), or wild type mixed with 10 µM DCMU during application to the electrode (+DCMUb). Photocurrent is normalized to the cell density of the sample applied to the working electrode, and wild type photocurrent for each experiment is set at 100%. Strains were grown under photomixotrophic (wild type versus Δ<i>psbB</i>) or photoautotrophic (± DCMU) conditions (as described in experimental procedures) and harvested at a similar phase of growth (determined by OD<sub>750</sub>). (B) Inhibition of photocurrent in response to DCMU concentration. Photocurrent produced from wild type cells was measured following 5 min dark incubation in the presence of the indicated concentration of DCMU. Appropriate volumes of DCMU were added from a 10 mM stock. The percentage of photocurrent compared to the uninhibited value in the absence of DCMU (100%) is shown. For panels A and B, error bars represent the standard deviation from the mean of at least 2 independent experiments. (C) Oxygen evolution by wild type, <i>ΔpsbB</i>, and wild type with 10 µM DCMU <i>Synechocystis</i> cells. Data are the average of at least three biological replicates, and the error bars show the standard deviation from the mean. Rates are normalized to OD<sub>750</sub>. For DCMUa, the inhibitor was added directly to the oxygen electrode chamber, and for DCMUb cells were pre-incubated with the inhibitor for five min prior to addition to the measurement chamber.</p>", "links"=>[], "tags"=>["Biochemistry", "Bioenergetics", "metabolism", "biotechnology", "Bioengineering", "Biological systems engineering", "Applied microbiology", "Bionanotechnology", "Environmental biotechnology", "microbiology", "bacteriology", "Bacterial biochemistry", "chemistry", "Electrochemistry", "Electrochemical cells", "photocurrent", "produced", "evolved", "photosynthetically", "inhibited"], "article_id"=>964448, "categories"=>["Biological Sciences"], "users"=>["Angelo Cereda", "Andrew Hitchcock", "Mark D. Symes", "Leroy Cronin", "Thomas S. Bibby", "Anne K. Jones"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0091484.g004", "stats"=>{"downloads"=>1, "page_views"=>13, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Comparison_of_photocurrent_produced_A_B_and_oxygen_evolved_C_by_wild_type_or_photosynthetically_inhibited_Synechocystis_cells_/964448", "title"=>"Comparison of photocurrent produced (A, B) and oxygen evolved (C) by wild type or photosynthetically inhibited <i>Synechocystis</i> cells.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-03-17 03:38:49"}
  • {"files"=>["https://ndownloader.figshare.com/files/1423415"], "description"=>"<p>(A) The solid line shows a representative current-time trace for immobilized <i>Synechocystis</i> cells in a chronoamperometry experiment. The current output in the dark was allowed to stabilize prior to illumination, with the steady state increase in current output in the light measured as the photocurrent. Controls with heat inactivated <i>Synechocystis</i> cells (dotted line) did not produce current under dark or illuminated conditions. (B) Representative chronoamperometric trace showing photocurrent produced by <i>Synechocystis</i> exposed to three consecutive dark/light cycles. Stars mark electrical spikes caused by restarting the electrochemical equipment. For both panels, the black and white bars below the x-axis indicate periods of dark and illuminated conditions, respectively.</p>", "links"=>[], "tags"=>["Biochemistry", "Bioenergetics", "metabolism", "biotechnology", "Bioengineering", "Biological systems engineering", "Applied microbiology", "Bionanotechnology", "Environmental biotechnology", "microbiology", "bacteriology", "Bacterial biochemistry", "chemistry", "Electrochemistry", "Electrochemical cells", "photocurrent", "produced", "cells", "immobilized", "carbon"], "article_id"=>964446, "categories"=>["Biological Sciences"], "users"=>["Angelo Cereda", "Andrew Hitchcock", "Mark D. Symes", "Leroy Cronin", "Thomas S. Bibby", "Anne K. Jones"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0091484.g002", "stats"=>{"downloads"=>6, "page_views"=>54, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Chronoamperogram_showing_photocurrent_produced_by_Synechocystis_cells_immobilized_on_a_carbon_cloth_electrode_/964446", "title"=>"Chronoamperogram showing photocurrent produced by <i>Synechocystis</i> cells immobilized on a carbon cloth electrode.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-03-17 03:38:49"}
  • {"files"=>["https://ndownloader.figshare.com/files/1423419"], "description"=>"<p><i>Synechocystis</i> sp. PCC 6803 strains used in this study.</p>", "links"=>[], "tags"=>["Biochemistry", "Bioenergetics", "metabolism", "biotechnology", "Bioengineering", "Biological systems engineering", "Applied microbiology", "Bionanotechnology", "Environmental biotechnology", "microbiology", "bacteriology", "Bacterial biochemistry", "chemistry", "Electrochemistry", "Electrochemical cells", "pcc", "6803", "strains"], "article_id"=>964450, "categories"=>["Biological Sciences"], "users"=>["Angelo Cereda", "Andrew Hitchcock", "Mark D. Symes", "Leroy Cronin", "Thomas S. Bibby", "Anne K. Jones"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0091484.t001", "stats"=>{"downloads"=>5, "page_views"=>14, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Synechocystis_sp_PCC_6803_strains_used_in_this_study_/964450", "title"=>"<i>Synechocystis</i> sp. PCC 6803 strains used in this study.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-03-17 03:38:49"}
  • {"files"=>["https://ndownloader.figshare.com/files/1423414"], "description"=>"<p>(A) Schematic representation of the bio-electrochemical device. The single chamber glass electrochemical cell contained 10 ml of BG11 as the electrolyte, a saturated Ag/AgCl reference electrode (2) and platinum wire as the counter electrode (3). <i>Synechocystis</i> cells (4) were dried onto the working carbon cloth electrode (1) and electrochemical measurements were performed using a CHI 1200A (CH instruments, Inc. Austin, Texas) potentiostat (5) with illumination provided by a red LED light source (6). (<b>B</b>) Scanning electron micrograph of wild type <i>Synechocystis</i> cells immobilized on a carbon cloth electrode.</p>", "links"=>[], "tags"=>["Biochemistry", "Bioenergetics", "metabolism", "biotechnology", "Bioengineering", "Biological systems engineering", "Applied microbiology", "Bionanotechnology", "Environmental biotechnology", "microbiology", "bacteriology", "Bacterial biochemistry", "chemistry", "Electrochemistry", "Electrochemical cells", "bio-electrochemical", "setup", "photocurrent"], "article_id"=>964445, "categories"=>["Biological Sciences"], "users"=>["Angelo Cereda", "Andrew Hitchcock", "Mark D. Symes", "Leroy Cronin", "Thomas S. Bibby", "Anne K. Jones"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0091484.g001", "stats"=>{"downloads"=>2, "page_views"=>21, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_The_bio_electrochemical_setup_used_to_measure_photocurrent_in_this_study_/964445", "title"=>"The bio-electrochemical setup used to measure photocurrent in this study.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-03-17 03:38:49"}
  • {"files"=>["https://ndownloader.figshare.com/files/1423423", "https://ndownloader.figshare.com/files/1423424", "https://ndownloader.figshare.com/files/1423425", "https://ndownloader.figshare.com/files/1423426"], "description"=>"<div><p>Biophotovoltaic devices employ photosynthetic organisms at the anode of a microbial fuel cell to generate electrical power. Although a range of cyanobacteria and algae have been shown to generate photocurrent in devices of a multitude of architectures, mechanistic understanding of extracellular electron transfer by phototrophs remains minimal. Here we describe a mediatorless bioelectrochemical device to measure the electrogenic output of a planktonically grown cyanobacterium, <i>Synechocystis</i> sp. PCC6803. Light dependent production of current is measured, and its magnitude is shown to scale with microbial cell concentration and light intensity. Bioelectrochemical characterization of a <i>Synechocystis</i> mutant lacking Photosystem II demonstrates conclusively that production of the majority of photocurrent requires a functional water splitting aparatus and electrons are likely ultimately derived from water. This shows the potential of the device to rapidly and quantitatively characterize photocurrent production by genetically modified strains, an approach that can be used in future studies to delineate the mechanisms of cyanobacterial extracellular electron transport.</p></div>", "links"=>[], "tags"=>["Biochemistry", "Bioenergetics", "metabolism", "biotechnology", "Bioengineering", "Biological systems engineering", "Applied microbiology", "Bionanotechnology", "Environmental biotechnology", "microbiology", "bacteriology", "Bacterial biochemistry", "chemistry", "Electrochemistry", "Electrochemical cells", "bioelectrochemical", "extracellular", "electron", "pcc6803"], "article_id"=>964452, "categories"=>["Biological Sciences"], "users"=>["Angelo Cereda", "Andrew Hitchcock", "Mark D. Symes", "Leroy Cronin", "Thomas S. Bibby", "Anne K. Jones"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0091484.s001", "https://dx.doi.org/10.1371/journal.pone.0091484.s002", "https://dx.doi.org/10.1371/journal.pone.0091484.s003", "https://dx.doi.org/10.1371/journal.pone.0091484.s004"], "stats"=>{"downloads"=>7, "page_views"=>18, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/A_Bioelectrochemical_Approach_to_Characterize_Extracellular_Electron_Transfer_by_Synechocystis_sp_PCC6803/964452", "title"=>"A Bioelectrochemical Approach to Characterize Extracellular Electron Transfer by <i>Synechocystis</i> sp. PCC6803", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2014-03-17 03:38:49"}
  • {"files"=>["https://ndownloader.figshare.com/files/1423418"], "description"=>"a<p>For primers p2 and p3 the italicised sequence is homologous to the 5′ (p2) or 3′ (p3) end of the zeocin resistance cassette.</p>", "links"=>[], "tags"=>["Biochemistry", "Bioenergetics", "metabolism", "biotechnology", "Bioengineering", "Biological systems engineering", "Applied microbiology", "Bionanotechnology", "Environmental biotechnology", "microbiology", "bacteriology", "Bacterial biochemistry", "chemistry", "Electrochemistry", "Electrochemical cells", "primers"], "article_id"=>964449, "categories"=>["Biological Sciences"], "users"=>["Angelo Cereda", "Andrew Hitchcock", "Mark D. Symes", "Leroy Cronin", "Thomas S. Bibby", "Anne K. Jones"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0091484.t002", "stats"=>{"downloads"=>1, "page_views"=>9, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Oligonucleotide_primers_used_in_this_study_a_/964449", "title"=>"Oligonucleotide primers used in this study<sup>a</sup>.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-03-17 03:38:49"}
  • {"files"=>["https://ndownloader.figshare.com/files/1423416"], "description"=>"<p>Dependence of photocurrent on cell density (A) and light intensity (B). Part (C) shows the effect of light intensity on the initial rate of increase in photocurrent upon illumination. The inset panels in parts (B) and (C) show only the linear portions of the curves. For (B–C) a cell density of ∼35–50 was used. In A and C, illumination was at a fixed intensity of 20 W m<sup>−2</sup>. The correlation coefficient (R<sup>2</sup>) is given to indicate the linearity of relationships, and error bars represent one standard deviation from the mean of at least 2 independent experiments. Lines show the best linear fit to the data.</p>", "links"=>[], "tags"=>["Biochemistry", "Bioenergetics", "metabolism", "biotechnology", "Bioengineering", "Biological systems engineering", "Applied microbiology", "Bionanotechnology", "Environmental biotechnology", "microbiology", "bacteriology", "Bacterial biochemistry", "chemistry", "Electrochemistry", "Electrochemical cells", "affecting", "photocurrent"], "article_id"=>964447, "categories"=>["Biological Sciences"], "users"=>["Angelo Cereda", "Andrew Hitchcock", "Mark D. Symes", "Leroy Cronin", "Thomas S. Bibby", "Anne K. Jones"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0091484.g003", "stats"=>{"downloads"=>1, "page_views"=>18, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Quantitative_analysis_of_key_parameters_affecting_photocurrent_generation_/964447", "title"=>"Quantitative analysis of key parameters affecting photocurrent generation.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-03-17 03:38:49"}

PMC Usage Stats | Further Information

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  • {"unique-ip"=>"8", "full-text"=>"8", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"5"}
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  • {"unique-ip"=>"7", "full-text"=>"7", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"8"}
  • {"unique-ip"=>"7", "full-text"=>"9", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"9"}
  • {"unique-ip"=>"7", "full-text"=>"9", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"7", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"10"}
  • {"unique-ip"=>"7", "full-text"=>"4", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2017", "month"=>"11"}
  • {"unique-ip"=>"7", "full-text"=>"8", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"3", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"12"}
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Relative Metric

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