Holger Dau

Summary

Country: Germany

Publications

  1. ncbi request reprint The tetra-manganese complex of photosystem II during its redox cycle - X-ray absorption results and mechanistic implications
    H Dau
    Phillips Universität Marburg, FB Biologie, Lahnberge, D 35032, Marburg, Germany
    Biochim Biophys Acta 1503:24-39. 2001
  2. ncbi request reprint Considerations on the mechanism of photosynthetic water oxidation - dual role of oxo-bridges between Mn ions in (i) redox-potential maintenance and (ii) proton abstraction from substrate water
    Holger Dau
    Freie Universitat Berlin, FB Physik Arnimallee 14, 14195 Berlin, Germany
    Photosynth Res 84:325-31. 2005
  3. pmc On the structure of the manganese complex of photosystem II: extended-range EXAFS data and specific atomic-resolution models for four S-states
    Holger Dau
    Freie Universitat Berlin, FB Physik, Arnimallee 14, 14195 Berlin, Germany
    Philos Trans R Soc Lond B Biol Sci 363:1237-43; discussion 1243-4. 2008
  4. ncbi request reprint X-ray absorption spectroscopy to analyze nuclear geometry and electronic structure of biological metal centers--potential and questions examined with special focus on the tetra-nuclear manganese complex of oxygenic photosynthesis
    Holger Dau
    FB Physik, Freie Universitat Berlin, Arnimallee 14, 14195, Berlin, Germany
    Anal Bioanal Chem 376:562-83. 2003
  5. ncbi request reprint X-ray absorption spectroscopy to watch catalysis by metalloenzymes: status and perspectives discussed for the water-splitting manganese complex of photosynthesis
    Holger Dau
    Freie Universitat Berlin, FB Physik, Arnimallee 14, Germany
    J Synchrotron Radiat 10:76-85. 2003
  6. ncbi request reprint Eight steps preceding O-O bond formation in oxygenic photosynthesis--a basic reaction cycle of the Photosystem II manganese complex
    Holger Dau
    Freie Universitat Berlin, FB PhysikArnimallee 14, D 14195 Berlin, Germany
    Biochim Biophys Acta 1767:472-83. 2007
  7. ncbi request reprint The first room-temperature X-ray absorption spectra of higher oxidation states of the tetra-manganese complex of photosystem II
    Michael Haumann
    Fachbereich Physik, Freie Universitat Berlin, Arnimallee 14, D 14195, Berlin, Germany
    FEBS Lett 512:116-20. 2002
  8. ncbi request reprint Time-resolved X-ray spectroscopy leads to an extension of the classical S-state cycle model of photosynthetic oxygen evolution
    Holger Dau
    FB Physik, Freie Universitat Berlin, Arnimallee 14, 14195 Berlin, Germany
    Photosynth Res 92:327-43. 2007
  9. ncbi request reprint Rapid loss of structural motifs in the manganese complex of oxygenic photosynthesis by X-ray irradiation at 10-300 K
    Markus Grabolle
    Freie Universitat Berlin, FB Physik, Arnimallee 14, D 14195 Berlin, Germany
    J Biol Chem 281:4580-8. 2006
  10. ncbi request reprint First steps towards time-resolved BioXAS at room temperature: state transitions of the manganese complex of oxygenic photosynthesis
    Michael Haumann
    Freie Universitat Berlin, FB Physik, Arnimallee 14, D 14195 Berlin, Germany
    J Synchrotron Radiat 9:304-8. 2002

Collaborators

Detail Information

Publications45

  1. ncbi request reprint The tetra-manganese complex of photosystem II during its redox cycle - X-ray absorption results and mechanistic implications
    H Dau
    Phillips Universität Marburg, FB Biologie, Lahnberge, D 35032, Marburg, Germany
    Biochim Biophys Acta 1503:24-39. 2001
    ..According to this hypothesis, water oxidation is facilitated by manganese reduction that is coupled to proton transfer from a substrate water to bridging oxides...
  2. ncbi request reprint Considerations on the mechanism of photosynthetic water oxidation - dual role of oxo-bridges between Mn ions in (i) redox-potential maintenance and (ii) proton abstraction from substrate water
    Holger Dau
    Freie Universitat Berlin, FB Physik Arnimallee 14, 14195 Berlin, Germany
    Photosynth Res 84:325-31. 2005
    ....
  3. pmc On the structure of the manganese complex of photosystem II: extended-range EXAFS data and specific atomic-resolution models for four S-states
    Holger Dau
    Freie Universitat Berlin, FB Physik, Arnimallee 14, 14195 Berlin, Germany
    Philos Trans R Soc Lond B Biol Sci 363:1237-43; discussion 1243-4. 2008
    ..This specific working model may permit discussion, verification and invalidation of its various features in comparison with experimental and theoretical findings...
  4. ncbi request reprint X-ray absorption spectroscopy to analyze nuclear geometry and electronic structure of biological metal centers--potential and questions examined with special focus on the tetra-nuclear manganese complex of oxygenic photosynthesis
    Holger Dau
    FB Physik, Freie Universitat Berlin, Arnimallee 14, 14195, Berlin, Germany
    Anal Bioanal Chem 376:562-83. 2003
    ..Furthermore, the potential of modern XANES theory is demonstrated by presenting first simulations of the dichroism in the XANES spectra of the PSII manganese complex...
  5. ncbi request reprint X-ray absorption spectroscopy to watch catalysis by metalloenzymes: status and perspectives discussed for the water-splitting manganese complex of photosynthesis
    Holger Dau
    Freie Universitat Berlin, FB Physik, Arnimallee 14, Germany
    J Synchrotron Radiat 10:76-85. 2003
    ....
  6. ncbi request reprint Eight steps preceding O-O bond formation in oxygenic photosynthesis--a basic reaction cycle of the Photosystem II manganese complex
    Holger Dau
    Freie Universitat Berlin, FB PhysikArnimallee 14, D 14195 Berlin, Germany
    Biochim Biophys Acta 1767:472-83. 2007
    ..Furthermore we discuss how the I-cycle model addresses the redox-potential problem of PSII water oxidation and we propose that the accumulated bases facilitate dioxygen formation by acting as proton acceptors...
  7. ncbi request reprint The first room-temperature X-ray absorption spectra of higher oxidation states of the tetra-manganese complex of photosystem II
    Michael Haumann
    Fachbereich Physik, Freie Universitat Berlin, Arnimallee 14, D 14195, Berlin, Germany
    FEBS Lett 512:116-20. 2002
    ..The room temperature data is compatible with the formation of a third di-mu-oxo bridge between two Mn atoms upon the S(2)-->S(3) transition...
  8. ncbi request reprint Time-resolved X-ray spectroscopy leads to an extension of the classical S-state cycle model of photosynthetic oxygen evolution
    Holger Dau
    FB Physik, Freie Universitat Berlin, Arnimallee 14, 14195 Berlin, Germany
    Photosynth Res 92:327-43. 2007
    ..This leads us to an extension of the classical S-state cycle towards a basic model which describes sequence and interplay of electron and proton abstraction events at the donor side of PSII [Dau and Haumann, Science 312:1471-1472, 2006]...
  9. ncbi request reprint Rapid loss of structural motifs in the manganese complex of oxygenic photosynthesis by X-ray irradiation at 10-300 K
    Markus Grabolle
    Freie Universitat Berlin, FB Physik, Arnimallee 14, D 14195 Berlin, Germany
    J Biol Chem 281:4580-8. 2006
    ..It is proposed to employ controlled x-ray photoreduction in metalloprotein research for: (i) population of distinct reduced states, (ii) estimating the redox potential of buried metal centers, and (iii) research on protein dynamics...
  10. ncbi request reprint First steps towards time-resolved BioXAS at room temperature: state transitions of the manganese complex of oxygenic photosynthesis
    Michael Haumann
    Freie Universitat Berlin, FB Physik, Arnimallee 14, D 14195 Berlin, Germany
    J Synchrotron Radiat 9:304-8. 2002
    ..In this work, first time-resolved XAS results under quasi-physiological conditions (at room temperature, non-crystalline samples) on PSII are presented. Perspectives of time-resolved BioXAS are discussed...
  11. doi request reprint Protein-protein complex formation affects the Ni-Fe and Fe-S centers in the H2-sensing regulatory hydrogenase from Ralstonia eutropha H16
    Simone Löscher
    Experimental Physics, Freie Universitat Berlin, Arnimallee 14, 14195 Berlin, Germany
    Chemphyschem 11:1297-306. 2010
    ..Both one Fe-S cluster in HoxB and an oxygen-rich Ni coordination seem to be stabilized by RH dimerization involving the C-terminus of HoxB and by complex formation with HoxJ...
  12. ncbi request reprint A novel BioXAS technique with sub-millisecond time resolution to track oxidation state and structural changes at biological metal centers
    Michael Haumann
    Freie Universitat Berlin, FB Physik, Arnimallee 14, D 14195 Berlin, Germany
    J Synchrotron Radiat 12:35-44. 2005
    ..Oxidation-state changes are monitored with a time resolution as good as 200 micros. The current prospects and limitations as well as future perspectives of time-resolved BioXAS are discussed...
  13. pmc Enthalpy changes during photosynthetic water oxidation tracked by time-resolved calorimetry using a photothermal beam deflection technique
    Roland Krivanek
    Freie Universitat Berlin, Fachbereich Physik, Berlin, Germany
    Biophys J 94:1890-903. 2008
    ..A prominent nonthermal photothermal beam deflection signal (apparent DeltaV of about +42 A(3)) may reflect O(2) and proton release from the manganese complex, but also reorganization of the protein matrix...
  14. pmc Stepwise transition of the tetra-manganese complex of photosystem II to a binuclear Mn2(micro -O)2 complex in response to a temperature jump: a time-resolved structural investigation employing x-ray absorption spectroscopy
    Pavel Pospisil
    Freie Universitat Berlin, FB Physik, D 14195 Berlin, Germany
    Biophys J 84:1370-86. 2003
    ..3) Finally, the tightly-bound Mn(2)( micro -O)(2) unit is slowly reduced and released (k(3) = 0.014 min(-1))...
  15. ncbi request reprint Spare quinones in the QB cavity of crystallized photosystem II from Thermosynechococcus elongatus
    Roland Krivanek
    Freie Universitat Berlin, FB Physik, Arnimallee 14, D 14195 Berlin, Germany
    Biochim Biophys Acta 1767:520-7. 2007
    ..We propose that the extra quinones are located in the Q(B) cavity and serve as a PSII intrinsic pool of electron acceptors...
  16. ncbi request reprint Intermediates in assembly by photoactivation after thermally accelerated disassembly of the manganese complex of photosynthetic water oxidation
    Marcos Barra
    Freie Universitat Berlin, FB Physik, Arnimallee 14, D 14195 Berlin, Germany
    Biochemistry 45:14523-32. 2006
    ..It is proposed that a MnIII2(di-mu-oxo) complex is a key intermediate both in the disassembly and in the assembly reaction paths...
  17. ncbi request reprint Bromide does not bind to the Mn4Ca complex in its S1 state in Cl(-)-depleted and Br(-)-reconstituted oxygen-evolving photosystem II: evidence from X-ray absorption spectroscopy at the Br K-edge
    Michael Haumann
    Freie Universitat Berlin, FB Physik, Arnimallee 14, D 14195 Berlin, Germany
    Biochemistry 45:13101-7. 2006
    ..The native Cl(-) ion may bind at a similar distance. Accordingly, water oxidation may not require binding of a halide directly to the metal ions of the Mn complex in its S(1) state...
  18. ncbi request reprint Photosynthetic dioxygen formation studied by time-resolved delayed fluorescence measurements--method, rationale, and results on the activation energy of dioxygen formation
    Joachim Buchta
    Freie University Berlin, FB Physik, Arnimallee 14, D 14195 Berlin, Germany
    Biochim Biophys Acta 1767:565-74. 2007
    ....
  19. ncbi request reprint Bias from H2 cleavage to production and coordination changes at the Ni-Fe active site in the NAD+-reducing hydrogenase from Ralstonia eutropha
    Simone Löscher
    Freie Universitat Berlin, Institut fur Experimentalphysik, Arnimallee 14, D 14195 Berlin, Germany
    Biochemistry 45:11658-65. 2006
    ..Electrons derived from H2 cleavage, on the other hand, are transferred to NAD+ via a different pathway involving a [4Fe-4S] cluster in HoxY, which is reducible only in wild-type SH but not in the H16L variant...
  20. doi request reprint Energetics and kinetics of photosynthetic water oxidation studied by photothermal beam deflection (PBD) experiments
    André Klauss
    FB Physik, Institut fur Experimentalphysik, Freie Universitat Berlin, Arnimallee 14, 14195 Berlin, Germany
    Photosynth Res 102:499-509. 2009
    ..Detailed PBD studies on all S-transitions will contribute to the progress in PSII research by providing insights not accessible by other spectroscopic methods...
  21. pmc Alternating electron and proton transfer steps in photosynthetic water oxidation
    André Klauss
    Physics Department, Freie Universitat Berlin, 14195 Berlin, Germany
    Proc Natl Acad Sci U S A 109:16035-40. 2012
    ....
  22. ncbi request reprint Efficiency and role of loss processes in light-driven water oxidation by PSII
    Markus Grabolle
    Freie Universitat Berlin, FB Physik, Arnimallee 14, D 14195 Berlin, Germany
    Physiol Plant 131:50-63. 2007
    ..A physiological function of the recombination losses could be limitation of the lifetime of the reactive donor-side tyrosine radical (Y(.) (Z)) in the case of low-pH blockage of water oxidation...
  23. ncbi request reprint Hydrogen-induced structural changes at the nickel site of the regulatory [NiFe] hydrogenase from Ralstonia eutropha detected by X-ray absorption spectroscopy
    Michael Haumann
    Institut fur Experimentalphysik, Freie Universitat Berlin, Arnimallee 14, D 14195 Berlin, Germany
    Biochemistry 42:11004-15. 2003
    ..Implications of the structural features of the Ni site of the RH in relation to its function, hydrogen sensing, are discussed...
  24. ncbi request reprint Reduction of unusual iron-sulfur clusters in the H2-sensing regulatory Ni-Fe hydrogenase from Ralstonia eutropha H16
    Thorsten Buhrke
    Humboldt Universitat zu Berlin, Institut für Biologie Mikrobiologie, Berlin, Germany
    J Biol Chem 280:19488-95. 2005
    ..eutropha...
  25. doi request reprint Water oxidation by electrodeposited cobalt oxides--role of anions and redox-inert cations in structure and function of the amorphous catalyst
    Marcel Risch
    FB Physik, Freie Universitat Berlin, Berlin, Germany
    ChemSusChem 5:542-9. 2012
    ..On these grounds, structure-activity relations are discussed...
  26. pmc Thermodynamic limitations of photosynthetic water oxidation at high proton concentrations
    Ivelina Zaharieva
    Fachbereich Physik, Freie Universitat Berlin, Arnimallee 14, 14195 Berlin, Germany
    J Biol Chem 286:18222-8. 2011
    ..They also imply that, in intact organisms, the pH in the lumen compartment can hardly drop below 5, thereby limiting the ΔpH contribution to the driving force of ATP synthesis...
  27. doi request reprint Water oxidation by photosystem II: H(2)O-D(2)O exchange and the influence of pH support formation of an intermediate by removal of a proton before dioxygen creation
    Laszlo Gerencser
    Freie Universität Berlin, FB Physik, Arnimallee 14, D 14195 Berlin, Germany
    Biochemistry 49:10098-106. 2010
    ....
  28. ncbi request reprint Specific loss of the extrinsic 18 KDa protein from photosystem II upon heating to 47 degrees C causes inactivation of oxygen evolution likely due to Ca release from the Mn-complex
    Marcos Barra
    FB Physik, Freie Universitat Berlin, Arnimallee 14, 14195 Berlin, Germany
    Photosynth Res 84:231-7. 2005
    ..The S2-state multiline EPR signal of the Mn complex was still generated in heat-treated PS II presumably lacking Ca, but retaining four Mn ions...
  29. ncbi request reprint Water oxidation by amorphous cobalt-based oxides: volume activity and proton transfer to electrolyte bases
    Katharina Klingan
    FB Physik, Freie Universitat Berlin, Arnimallee 14, 14195 Berlin Germany
    ChemSusChem 7:1301-10. 2014
    ..The reported findings may be of general relevance for water oxidation catalyzed at moderate pH by amorphous transition-metal oxides. ..
  30. pmc Carboxylate shifts steer interquinone electron transfer in photosynthesis
    Petko Chernev
    Freie Universitat Berlin, Institut fur Experimentalphysik, 14195 Berlin, Germany
    J Biol Chem 286:5368-74. 2011
    ..Formation of a specific priming intermediate by nuclear rearrangements, setting the stage for subsequent ET, may be a common motif in reactions of biological redox cofactors...
  31. doi request reprint Principles, efficiency, and blueprint character of solar-energy conversion in photosynthetic water oxidation
    Holger Dau
    Freie Universitat Berlin, FB Physik, Arnimallee 14, D 14195 Berlin, Germany
    Acc Chem Res 42:1861-70. 2009
    ..In conclusion, photosynthetic water oxidation works at high efficiency and thus can serve as both an inspiring model and a benchmark in the development of future technologies for production of solar fuels...
  32. pmc Photosynthetic water oxidation at elevated dioxygen partial pressure monitored by time-resolved X-ray absorption measurements
    Michael Haumann
    Freie Universitat Berlin, Institut fur Experimentalphysik, Arnimallee 14, 14195 Berlin, Germany
    Proc Natl Acad Sci U S A 105:17384-9. 2008
    ..Our results suggest that photosynthesis at ambient conditions is not limited by product inhibition of the O(2) formation step...
  33. doi request reprint Extended protein/water H-bond networks in photosynthetic water oxidation
    Ana Nicoleta Bondar
    Department of Physics, Free University, Berlin, Germany
    Biochim Biophys Acta 1817:1177-90. 2012
    ..This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: from Natural to Artificial...
  34. doi request reprint Fast structural changes (200-900ns) may prepare the photosynthetic manganese complex for oxidation by the adjacent tyrosine radical
    André Klauss
    Physics Department, Free University, Berlin, Germany
    Biochim Biophys Acta 1817:1196-207. 2012
    ..This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: From Natural to Artificial...
  35. doi request reprint Nickel-oxido structure of a water-oxidizing catalyst film
    Marcel Risch
    Freie Universitat Berlin, FB Physik, Arnimallee 14, 14195 Berlin, Germany
    Chem Commun (Camb) 47:11912-4. 2011
    ..The structure is surprisingly similar to that of an analogous Co-based film and colloidal Mn-based catalysts. Structural requirements for water oxidation are discussed...
  36. pmc Structural basis of cyanobacterial photosystem II Inhibition by the herbicide terbutryn
    Matthias Broser
    Institut für Chemie Max Volmer Laboratorium für Biophysikalische Chemie, Technische Universitat Berlin, Berlin, Germany
    J Biol Chem 286:15964-72. 2011
    ..Kern, J., Gabdulkhakov, A., Broser, M., Zouni, A., and Saenger, W. (2009) Nat. Struct. Mol. Biol. 16, 334-342). This discovery is discussed in the context of proton transfer to the lumen...
  37. ncbi request reprint Energetics of primary and secondary electron transfer in Photosystem II membrane particles of spinach revisited on basis of recombination-fluorescence measurements
    Markus Grabolle
    Freie Universitat Berlin, FB Physik Arnimallee 14, D 14195 Berlin, Germany
    Biochim Biophys Acta 1708:209-18. 2005
    ..Assuming a QA-/QA redox potential of -0.08 V, the following redox-potential estimates are obtained: +1.25 V for P680/P680+; +1.21 V for Z/Z+ (at 10 mus); -0.42 V for Phe-/Phe; -0.58 V for P680*/P680+...
  38. doi request reprint Recent developments in research on water oxidation by photosystem II
    Holger Dau
    Freie Universitat Berlin, Institut fur Experimentalphysik, Arnimallee 14, 14195 Berlin, Germany
    Curr Opin Chem Biol 16:3-10. 2012
    ..A basic reaction-cycle model predicts an alternating proton and electron removal from the catalytic site, which facilitates energetically efficient water oxidation...
  39. doi request reprint Structural models of the manganese complex of photosystem II and mechanistic implications
    Alexander Grundmeier
    Freie Universitat Berlin, FB Physik Arnimalle 14, D 14195 Berlin, Germany
    Biochim Biophys Acta 1817:88-105. 2012
    ..On these grounds, mechanistic implications for the O−O bond formation chemistry are discussed. This article is part of a Special Issue entitled: Photosystem II...
  40. ncbi request reprint The role of zinc in the methylation of the coenzyme M thiol group in methanol:coenzyme M methyltransferase from Methanosarcina barkeri
    Markus Krüer
    Max Planck Institut für Terrestrische Mikrobiologie and Laboratorium für Mikrobiologie, Fachbereich Biologie der Philipps Universität, Marburg, Germany
    Eur J Biochem 269:2117-23. 2002
    ..In the His237-->Ala and Cys239-->Ala mutants, coenzyme M also seemed to bind efficiently by ligation to zinc indicating that some aspects of the zinc ligand environment are surprisingly uncritical for coenzyme M binding...
  41. ncbi request reprint Linear dichroism in the XANES of partially oriented samples: theory and application to the photosynthetic manganese complex
    Peter Liebisch
    , FB Physik, Arnimallee 14, D 14195 Berlin, Germany
    Chemphyschem 11:1236-47. 2010
    ..However, currently this assignment remains uncertain. In future studies, the LD-XANES analysis should play an important role in construction of unequivocal atomic-resolution model of the photosynthetic Mn complex...
  42. ncbi request reprint Valinomycin sensitivity proves that light-induced thylakoid voltages result in millisecond phase of chlorophyll fluorescence transients
    Pavel Pospisil
    FB Physik, Freie Universitat Berlin, Arminallee 14, D 14195 Dahlem, Berlin, Germany
    Biochim Biophys Acta 1554:94-100. 2002
    ..A putative role of thylakoid voltages in protection of PSII against photoinhibitory damage is discussed...
  43. pmc The photosystem II-associated Cah3 in Chlamydomonas enhances the O2 evolution rate by proton removal
    Tatiana Shutova
    Department of Plant Physiology, Umea Plant Science Centre, Umea University, Umea, Sweden
    EMBO J 27:782-91. 2008
    ..Our results underlie the general importance of proton release at the donor side of PSII during water oxidation...
  44. ncbi request reprint Structural and oxidation-state changes at its nonstandard Ni-Fe site during activation of the NAD-reducing hydrogenase from Ralstonia eutropha detected by X-ray absorption, EPR, and FTIR spectroscopy
    Tanja Burgdorf
    Humboldt Universitat zu Berlin, Mikrobiologie, Chausseestr 117, D 10115 Berlin, Germany
    J Am Chem Soc 127:576-92. 2005
    ..It is proposed that the predominant coordination by (CN),O ligands stabilizes the Ni(II) oxidation state throughout the catalytic cycle and is a prerequisite for the rapid activation of the SH in the presence of oxygen...
  45. ncbi request reprint Photosynthetic water oxidation at high O2 backpressure monitored by delayed chlorophyll fluorescence
    Jurgen Clausen
    Universitat Osnabruck, FB Biologie Chemie, Abt Biophysik, Barbarastrasse 11, D 49069 Osnabruck, Germany
    Biochemistry 44:12775-9. 2005
    ..The data are tentatively interpreted as the stabilization of a 2-fold oxidized state of the catalytic center (S2*) with bound peroxide and its slow conversion into the normal S2 state by the release of peroxide...