Fikret Mamedov
Professor at Department of Chemistry - Ångström Laboratory; Molecular Biomimetics; Biophysical and Bioinorganic Chemistry
- Telephone:
- +46 18 471 65 81
- E-mail:
- Fikret.Mamedov@kemi.uu.se
- Visiting address:
- Ångströmlaboratoriet, Lägerhyddsvägen 1
75120 Uppsala - Postal address:
- Box 523
75120 Uppsala
- ORCID:
- 0000-0002-6218-3039
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Research
We are focused in studying photosynthetic light reactions, in particular the water oxidation and proton coupled electron transfer in photosystem II. We use interdisciplinary approach combining a variety of biochemical, biophysical and spectroscopic techniques. Our primary method is Electron Paramagnetic Resonance Spectroscopy which is well suited to study the electron transfer reactions in biological systems.
Publications
Selection of publications
- Structural evidence for intermediates during O2 formation in photosystem II (2023)
- Molecular basis for turnover inefficiencies (misses) during water oxidation in photosystem II (2022)
- Assessment of the manganese cluster's oxidation state via photoactivation of photosystem II microcrystals (2020)
- Photosystem ratio imbalance promotes direct sustainable H-2 production in Chlamydomonas reinhardtii (2019)
- Tyrosine D oxidation and redox equilibrium in Photosystem II (2017)
- A five-coordinate Mn(IV) intermediate in biological water oxidation (2016)
- Photodamage of iron–sulphur clusters in photosystem I induces non-photochemical energy dissipation (2016)
- Hydrogen photoproduction in green algae Chlamydomonas reinhardtii under magnesium deprivation (2015)
- Spectroscopic Evidence for a Redox-Controlled Proton Gate at Tyrosine D in Photosystem II (2014)
- Increased photosystem II stability promotes H-2 production in sulfur-deprived Chlamydomonas reinhardtii (2013)
- Stability of the S(3) and S(2) State Intermediates in Photosystem II Directly Probed by EPR Spectroscopy (2012)
- Misses during Water Oxidation in Photosystem II Are S State-dependent (2012)
- Two tyrosines that changed the world (2012)
- Photosystem II Function and Dynamics in Three Widely Used Arabidopsis thaliana Accessions (2012)
- Electron paramagnetic resonance study of the electron transfer reactions in photosystem II membrane preparations from Arabidopsis thaliana (2011)
- S-state dependence of misses in the OEC probed by EPR spectroscopy of individual S-states (2008)
- IR-induced photochemistry in photosystem II (2008)
- Oxygen-induced changes in the redox state of the cytochrome b559 in photosystem II depend on the integrity of the Mn cluster (2007)
- Functional characterization of monomeric photosystem II core preparations from Thermosynechococcus elongatus with or without the Psb27 protein (2007)
- Functional Heterogeneity of Photosystem II in Domain Specific Regions of the Thylakoid Membrane of Spinach (Spinacia oleracea L.) (2007)
- Dimeric and monomeric organization of photosystem II. Distribution of five distinct complexes in the different domains of the thylakoid membrane. (2006)
- Spectral resolution of the split EPR signals induced by illumination at 5 K from the S1, S3, and S0 states in photosystem II. (2006)
- Split EPR signals from photosystem II are modified by methanol, reflecting S state-dependent binding and alterations in the magnetic coupling in the CaMn4 cluster. (2006)
- Logistics in the life cycle of photosystem II during maturation (2003)
- Photosystem II in different parts of the thylakoid membrane: a functional comparison between different domains (2000)
- Involvement of histidine 190 on the D1 protein in electron/proton transfer reactions on the donor side of photosystem II (1998)
- Coupled modification of the acceptor side of photosystem II during photoactivation of the oxygen evolving complex (1998)
Recent publications
- Improved hydrogen production in immobilized Chlamydomonas reinhardtii cells with inhibited inter-photosystem electron transfer (2024)
- The S1 to S2 and S2 to S3 state transitions in plant photosystem II: relevance to the functional and structural heterogeneity of the water oxidizing complex (2024)
- Differential FeS cluster photodamage plays a critical role in regulating excess electron flow through photosystem I (2024)
- Structural evidence for intermediates during O2 formation in photosystem II (2023)
- Partial inhibition of the inter-photosystem electron transfer at cytochrome b6f complex promotes periodic surges of hydrogen evolution in Chlamydomonas reinhardtii (2023)
All publications
Articles
- Improved hydrogen production in immobilized Chlamydomonas reinhardtii cells with inhibited inter-photosystem electron transfer (2024)
- The S1 to S2 and S2 to S3 state transitions in plant photosystem II: relevance to the functional and structural heterogeneity of the water oxidizing complex (2024)
- Differential FeS cluster photodamage plays a critical role in regulating excess electron flow through photosystem I (2024)
- Structural evidence for intermediates during O2 formation in photosystem II (2023)
- Partial inhibition of the inter-photosystem electron transfer at cytochrome b6f complex promotes periodic surges of hydrogen evolution in Chlamydomonas reinhardtii (2023)
- Far-red photosynthesis (2023)
- Molecular basis for turnover inefficiencies (misses) during water oxidation in photosystem II (2022)
- The D1-V185N mutation alters substrate water exchange by stabilizing alternative structures of the Mn4Ca-cluster in photosystem II (2021)
- Upregulation of bundle sheath electron transport capacity under limiting light in C-4 Setaria viridis (2021)
- Photosynthetic hydrogen production: Novel protocols, promising engineering approaches and application of semi‐synthetic hydrogenases (2021)
- A conducting additive-free high potential quinone-based conducting redox polymer as lithium ion battery cathode (2021)
- Highly stable defective TiO2-x with tuned exposed facets induced by fluorine (2020)
- Assessment of the manganese cluster's oxidation state via photoactivation of photosystem II microcrystals (2020)
- Toward Sustainable H-2 Production (2020)
- PSB33 protein sustains photosystem II in plant chloroplasts under UV-A light (2020)
- The Low Molecular Mass Photosystem II Protein PsbTn Is Important for Light Acclimation (2019)
- Characterization of the transient fluorescence wave phenomenon that occurs during H-2 production in Chlamydomonas reinhardtii (2019)
- Photosystem ratio imbalance promotes direct sustainable H-2 production in Chlamydomonas reinhardtii (2019)
- "Birth defects' of photosystem II make it highly susceptible to photodamage during chloroplast biogenesis (2019)
- Efficient visible light-driven water oxidation catalysed by an iron(IV) clathrochelate complex (2019)
- Investigating electron transport in a PEDOT/Quinone conducting redox polymer with in situ methods (2019)
- Redox-State-Dependent Interplay between Pendant Group and Conducting Polymer Backbone in Quinone-Based Conducting Redox Polymers for Lithium Ion Batteries (2019)
- Formation of tyrosine radicals in photosystem II under far-red illumination (2018)
- Solar UV index and UV dose determination with photochromic hackmanites (2018)
- Long-Lasting Non-hydrogenated Dark Titanium Dioxide (2018)
- The wavelength of the incident light determines the primary charge separation pathway in Photosystem II (2018)
- Tyrosine D oxidation and redox equilibrium in Photosystem II (2017)
- Rearranging from 6-to 7-coordination initiates the catalytic activity (2017)
- Polaron Disproportionation Charge Transport in a Conducting Redox Polymer (2017)
- Sll1783, a monooxygenase associated with polysaccharide processing in the unicellular cyanobacterium Synechocystis PCC 6803 (2017)
- Lanthanide and Heavy Metal Free Long White Persistent Luminescence from Ti Doped Li-Hackmanite (2017)
- The protonation state around Tyr(D)/Tyr((D)) over dot in photosystem II is reflected in its biphasic oxidation kinetics (2017)
- Conducting redox polymers with non-activated charge transport properties (2017)
- Ultra long-lived electron-hole separation within water-soluble colloidal ZnO nanocrystals (2016)
- Photosystem II Repair and Plant Immunity (2016)
- Photosystem II repair and plant immunity (2016)
- Mechanisms of Tenebrescence and Persistent Luminescence in Synthetic Hackmanite Na8Al6Si6O24(Cl,S)(2) (2016)
- Challenges facing an understanding of the nature of low-energy excited states in photosynthesis (2016)
- A five-coordinate Mn(IV) intermediate in biological water oxidation (2016)
- Photodamage of iron–sulphur clusters in photosystem I induces non-photochemical energy dissipation (2016)
- Changes in the Photosystem II complex associated with hydrogen formation in sulfur deprived Chlamydomonas reinhardtii (2016)
- The PsbY protein of Arabidopsis Photosystem II is important for the redox control of cytochrome b(559) (2016)
- Photosystem II protein 33, a protein conserved in the plastid lineage, is associated with the chloroplast thylakoid membrane and provides stability to photosystem II supercomplexes in Arabidopsis (2015)
- Light acclimation involves dynamic re-organization of the pigment-protein megacomplexes in non-appressed thylakoid domains (2015)
- Hydrogen photoproduction in green algae Chlamydomonas reinhardtii under magnesium deprivation (2015)
- A Tandem Mass Spectrometric Method for Singlet Oxygen Measurement (2014)
- Defining the Far-red Limit of Photosystem I THE PRIMARY CHARGE SEPARATION IS FUNCTIONAL TO 840 nm (2014)
- The photochemistry in photosystem II at 5 K is different in visible and far-red light (2014)
- Spectroscopic Evidence for a Redox-Controlled Proton Gate at Tyrosine D in Photosystem II (2014)
- Dark-adapted spinach thylakoid protein heterogeneity offers insights into the Photosystem II repair cycle (2014)
- Split Electron Paramagnetic Resonance Signal Induction in Photosystem II Suggests Two Binding Sites in the S-2 State for the Substrate Analogue Methanol (2013)
- Split Electron Paramagnetic Resonance signal induction in photosystem II suggests two binding sites in the S2 state for the substrate analogue methanol (2013)
- Increased photosystem II stability promotes H-2 production in sulfur-deprived Chlamydomonas reinhardtii (2013)
- Stability of the S(3) and S(2) State Intermediates in Photosystem II Directly Probed by EPR Spectroscopy (2012)
- Misses during Water Oxidation in Photosystem II Are S State-dependent (2012)
- Two tyrosines that changed the world (2012)
- Photosystem II Function and Dynamics in Three Widely Used Arabidopsis thaliana Accessions (2012)
- Electron paramagnetic resonance study of the electron transfer reactions in photosystem II membrane preparations from Arabidopsis thaliana (2011)
- The PsbW protein stabilizes the supramolecular organization of photosystem II in higher plants (2011)
- Role of Novel Dimeric Photosystem II (PSII)-Psb27 Protein Complex in PSII Repair (2011)
- The formation of the split EPR signal from the S-3 state of Photosystem II does not involve primary charge separation (2011)
- Metalloradical EPR Signals from the Y-Z center dot S-State Intermediates in Photosystem II (2010)
- Effects of pH on the S3 State of the Oxygen Evolving Complex in Photosystem II Probed by EPR Split Signal Induction (2010)
- Comparison of the electron transport properties of the psbo1 and psbo2 mutants of Arabidopsis thaliana (2009)
- The S0 state of the water oxidizing complex in photosystem II (2009)
- Defining the Far-Red Limit of Photosystem II in Spinach (2009)
- Direct quantification of the four individual S states in Photosystem II using EPR spectroscopy (2008)
- EPR characterization of photosystem II from different domains of the thylakoid membrane (2008)
- Phosphorylation-dependent regulation of excitation energy distribution between the two photosystems in higher plants (2008)
- Insights into the function of PsbR protein in Arabidopsis thaliana (2007)
- Comparative study of the water oxidizing reactions and the millisecond delayed chlorophyll fluorescence in photosystem II at different pH (2007)
- Enhancement of Y-D(center dot) spin relaxation by the CaMn4 cluster in photosystem II detected at room temperature (2007)
- Oxygen-induced changes in the redox state of the cytochrome b559 in photosystem II depend on the integrity of the Mn cluster (2007)
- Functional characterization of monomeric photosystem II core preparations from Thermosynechococcus elongatus with or without the Psb27 protein (2007)
- Rhodobacter capsulatus magnesium chelatase subunit BchH contains an oxygen sensitive iron-sulfur cluster (2007)
- Formation Spectra of the EPR Split Signals from the S(0), S(1), and S(3) States in Photosystem II Induced by Monochromatic Light at 5 K (2007)
- Functional Heterogeneity of Photosystem II in Domain Specific Regions of the Thylakoid Membrane of Spinach (Spinacia oleracea L.) (2007)
- Dimeric and monomeric organization of photosystem II. Distribution of five distinct complexes in the different domains of the thylakoid membrane. (2006)
- Spectral resolution of the split EPR signals induced by illumination at 5 K from the S1, S3, and S0 states in photosystem II. (2006)
- Split EPR signals from photosystem II are modified by methanol, reflecting S state-dependent binding and alterations in the magnetic coupling in the CaMn4 cluster. (2006)
- PsbR, a missing link in the assembly of the oxygen-evolving complex of plant photosystem II. (2006)
- Modulation of photosynthetic electron transport in the absence of terminal electron acceptors: characterization of the rbcL deletion mutant of tobacco (2005)
- Quantification of photosystem I and II in different parts of the thylakoid membrane (2004)
- Relaxation behavior of the tyrosine YD radical in photosystem II: evidence for strong dipolar interaction with paramagnetic centers in the S1 and S2 States (2004)
- Molecular Interference of Cd2+ with Photosystem II (2004)
- Quinone-induced high-spin state of cytochrome b559 in photosystem II (2003)
- Logistics in the life cycle of photosystem II during maturation (2003)
- pH dependence of the donor side reactions in Ca2+-depleted photosystem II (2003)
- Influence of protein phosphorylation on the electron transport properties of photosystem II (2002)
- Photosystem II in different parts of the thylakoid membrane: a functional comparison between different domains (2000)
- Fractionation of the thylakoid membranes from tobacco. A tentative isolation of “end membrane” and purified “stroma lamellae” membranes (1999)
- Interconversion of low and high potential forms of cytochrome b559 in tris-washed photosystem II membranes under aerobic/anaerobic conditions (1999)
- The role of cytochrome b559 and tyrozineD in protection against photoinhibition during in vivo photoactivation of photosystem II (1999)
- Involvement of histidine 190 on the D1 protein in electron/proton transfer reactions on the donor side of photosystem II (1998)
- Coupled activation of the donor and acceptor side of photosystem II during activation of the oxygen evolving cluster (1998)
- Coupled activation of the donor and acceptor side of photosystem II during activation of the oxygen evolving cluster (1998)
- Photoactivation of modified and reactivated photosystem II oxygen evolving particles (1994)
- About the mechanism of PSII reaction center D1 protein degradation (1993)
- Effect of removal of peripheral polypeptides on photoinhibition of oxygen evolving PSII particles from spinach (1993)
- The same origin of the split EPR signal induced by visible or near-infrared light at liquid helium temperature from the S3-state of photosystem II
- Investigation and characterisation of EPR split signals in the native S2 state of Photosystem II
- Split EPR Signal Induction from the S2 State of the Oxygen Evolving Complex in Photosystem II is Steered by the Substrate Water Analogue Methanol
Chapters
Conferences
- S-state dependence of misses in the OEC probed by EPR spectroscopy of individual S-states (2008)
- The mechanism behind the formation of the “Split S3” EPR signal in photosystem II induced by visible or near-infrared light (2008)
- ESEEM study of the light-inducible Split S1 EPR signal from photosystem II (2008)
- IR-induced photochemistry in photosystem II (2008)
- Super-complex organization of photosystem II in the different domains of the thylakoid membrane (2005)
- Quantification of the light induced YZ·-split EPR-signals from photosystem II in the S0 and S1-states and the pH-dependence of “split S1” (2005)
- Conversion of the low potential form of cytochrome b559 into the high potential form in photosystem II under anaerobic and reducing conditions (1998)
- Changes in the oxidation state of cytochrome b559 and tyrosine-D during in vivo photoactivation of photosystem II (1998)
- Changes in the oxidation state of cytochrome b559 and tyrosine-D during in vivo photoactivation of photosystem II (1998)
- Coupled modification of the acceptor side of photosystem II during photoactivation of the oxygen evolving complex (1998)
- Structural assignments around tyrozine-Z in photosystem II using site-directed mutagenesis and structural modeling (1998)
- Chloroplasts largely devoid of grana stacks have full photosynthetic capability (1998)
- Effect of strong light on spinach photosystem II donor side reactions (1995)
- Light induced inhibition of oxygen evolution of photosystem II (1991)
