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Michael Haumann

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Nils Leidel; Kajsa G V Sigfridsson; Petko Chernev; Marcetta Y Darensbourg; Chung-Hung Hsieh; Michael Haumann
Bridging-hydride influence on the electronic structure of an [FeFe] hydrogenase active-site model complex revealed by XAES-DFT.
Kajsa G V Sigfridsson; Petko Chernev; Astrid Gräslund; Nils Leidel; Ana Popovic-Bijelic; Michael Haumann
Rapid X-ray photoreduction of dimetal-oxygen cofactors in ribonucleotide reductase.
André Klauss; Michael Haumann; Holger Dau
Alternating electron and proton transfer steps in photosynthetic water oxidation.

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2013: Nils Leidel; Kajsa G V Sigfridsson; Petko Chernev; Marcetta Y Darensbourg; Chung-Hung Hsieh; Michael Haumann
Bridging-hydride influence on the electronic structure of an [FeFe] hydrogenase active-site model complex revealed by XAES-DFT.
Dalton transactions (Cambridge, England : 2003) 2013;42(21):7539-54.
2013: Kajsa G V Sigfridsson; Petko Chernev; Astrid Gräslund; Nils Leidel; Ana Popovic-Bijelic; Michael Haumann
Rapid X-ray photoreduction of dimetal-oxygen cofactors in ribonucleotide reductase.
The Journal of biological chemistry 2013;288(14):9648-61.
2012: André Klauss; Michael Haumann; Holger Dau
Alternating electron and proton transfer steps in photosynthetic water oxidation.
Proceedings of the National Academy of Sciences of the United States of America 2012;109(40):16035-40.
2012: Nils Leidel; Sascha Ott; Lennart Schwartz; Petko Chernev; Kajsa G V Havelius; Michael Haumann
Electronic structure of an [FeFe] hydrogenase model complex in solution revealed by X-ray absorption spectroscopy using narrow-band emission detection.
Journal of the American Chemical Society 2012;134(34):14142-57.
2012: Nils Leidel; Sascha Ott; Petko Chernev; Salah Ezzaher; Kajsa G V Havelius; Michael Haumann
Site-selective X-ray spectroscopy on an asymmetric model complex of the [FeFe] hydrogenase active site.
Inorganic chemistry 2012;51(8):4546-59.
2012: Holger Dau; Ivelina Zaharieva; Michael Haumann
Recent developments in research on water oxidation by photosystem II.
Current opinion in chemical biology 2012;16(1-2):3-10.
2012: Nils Leidel; Ana Popović-Bijelić; Nina Voevodskaya; Petko Chernev; Astrid Gräslund; Kajsa G V Havelius; Michael Haumann
High-valent [MnFe] and [FeFe] cofactors in ribonucleotide reductases.
Biochimica et biophysica acta 2012;1817(3):430-44.
2011: Camilla Lambertz; Nils Leidel; Jens Noth; Martin Winkler; Petko Chernev; Thomas Happe; Kajsa G V Havelius; Michael Haumann
O2 reactions at the six-iron active site (H-cluster) in [FeFe]-hydrogenase.
The Journal of biological chemistry 2011;286(47):40614-23.
2011: Nora Planas; Stenbjörn Styring; Laura Vigara; Pere Miró; Clyde Cady; Christopher J Cramer; Holger Dau; Laura Gagliardi; Leif Hammarström; Michael Haumann; Ping Huang; Nils Leidel; Antoni Llobet
Electronic structure of oxidized complexes derived from cis-[Ru(II)(bpy)2(H2O)2]2+ and its photoisomerization mechanism.
Inorganic chemistry 2011;50(21):11134-42.
2011: Johannes Fritsch; Holger Dau; Antonio L De Lacey; Bärbel Friedrich; Oliver Lenz; Simone Löscher; Marcus Ludwig; Oliver Sanganas; Elisabeth Siebert; Matthias Stein; Ingo Zebger; Michael Haumann
[NiFe] and [FeS] cofactors in the membrane-bound hydrogenase of Ralstonia eutropha investigated by X-ray absorption spectroscopy: insights into O(2)-tolerant H(2) cleavage.
Biochemistry 2011;50(26):5858-69.
2011: Petko Chernev; Ivelina Zaharieva; Holger Dau; Michael Haumann
Carboxylate shifts steer interquinone electron transfer in photosynthesis.
The Journal of biological chemistry 2011;286(7):5368-74.
2011: Kajsa G V Havelius; Stefan Reschke; Sebastian Horn; Alexander Döring; Dimitri Niks; Russ Hille; Carola Schulzke; Silke Leimkühler; Michael Haumann
Structure of the molybdenum site in YedY, a sulfite oxidase homologue from Escherichia coli.
Inorganic chemistry 2011;50(3):741-8.
2011: Ilka Czech; Sven Stripp; Oliver Sanganas; Nils Leidel; Thomas Happe; Michael Haumann
The [FeFe]-hydrogenase maturation protein HydF contains a H-cluster like [4Fe4S]-2Fe site.
FEBS letters 2011;585(1):225-30.
2010: Simone Löscher; Antje Gebler; Matthias Stein; Oliver Sanganas; Thorsten Buhrke; Ingo Zebger; Holger Dau; Bärbel Friedrich; Oliver Lenz; Michael Haumann
Protein-protein complex formation affects the Ni-Fe and Fe-S centers in the H2-sensing regulatory hydrogenase from Ralstonia eutropha H16.
Chemphyschem : a European journal of chemical physics and physical chemistry 2010;11(6):1297-306.
2009: André Klauss; Roland Krivanek; Holger Dau; Michael Haumann
Energetics and kinetics of photosynthetic water oxidation studied by photothermal beam deflection (PBD) experiments.
Photosynthesis research 2009;102(2-3):499-509.
2009: Sven T Stripp; Gabrielle Goldet; Caterina Brandmayr; Oliver Sanganas; Kylie A Vincent; Michael Haumann; Fraser A Armstrong; Thomas Happe
How oxygen attacks [FeFe] hydrogenases from photosynthetic organisms.
Proceedings of the National Academy of Sciences of the United States of America 2009;106(41):17331-6.
2009: Sébastien Dementin; Fanny Leroux; Laurent Cournac; Antonio L De Lacey; Anne Volbeda; Christophe Léger; Bénédicte Burlat; Nicolas Martinez; Stéphanie Champ; Lydie Martin; Oliver Sanganas; Michael Haumann; Víctor M Fernández; Bruno Guigliarelli; Juan C Fontecilla-Camps; marc rousset
Introduction of methionines in the gas channel makes [NiFe] hydrogenase aero-tolerant.
Journal of the American Chemical Society 2009;131(29):10156-64.
2009: Sven Stripp; Oliver Sanganas; Thomas Happe; Michael Haumann
The structure of the active site H-cluster of [FeFe] hydrogenase from the green alga Chlamydomonas reinhardtii studied by X-ray absorption spectroscopy.
Biochemistry 2009;48(22):5042-9.
2008: Michael Haumann; Alexander Grundmeier; Ivelina Zaharieva; Holger Dau
Photosynthetic water oxidation at elevated dioxygen partial pressure monitored by time-resolved X-ray absorption measurements.
Proceedings of the National Academy of Sciences of the United States of America 2008;105(45):17384-9.
2008: Holger Dau; Alexander Grundmeier; Paola Loja; Michael Haumann
On the structure of the manganese complex of photosystem II: extended-range EXAFS data and specific atomic-resolution models for four S-states.
Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2008;363(1494):1237-43; discussion 1243-4.
2008: Roland Krivanek; Holger Dau; Michael Haumann
Enthalpy changes during photosynthetic water oxidation tracked by time-resolved calorimetry using a photothermal beam deflection technique.
Biophysical journal 2008;94(5):1890-903.
2007: Simone Löscher; Lennart Schwartz; Matthias Stein; Sascha Ott; Michael Haumann
Facilitated hydride binding in an Fe-Fe hydrogenase active-site biomimic revealed by X-ray absorption spectroscopy and DFT calculations.
Inorganic chemistry 2007;46(26):11094-105.
2007: Holger Dau; Michael Haumann
Eight steps preceding O-O bond formation in oxygenic photosynthesis--a basic reaction cycle of the Photosystem II manganese complex.
Biochimica et biophysica acta 2007;1767(6):472-83.
2007: Roland Krivanek; Jan Kern; Athina Zouni; Holger Dau; Michael Haumann
Spare quinones in the QB cavity of crystallized photosystem II from Thermosynechococcus elongatus.
Biochimica et biophysica acta 2007;1767(6):520-7.
2007: Holger Dau; Michael Haumann
Time-resolved X-ray spectroscopy leads to an extension of the classical S-state cycle model of photosynthetic oxygen evolution.
Photosynthesis research 2007;92(3):327-43.
2006: Marcos Barra; Michael Haumann; Paola Loja; Roland Krivanek; Alexander Grundmeier; Holger Dau
Intermediates in assembly by photoactivation after thermally accelerated disassembly of the manganese complex of photosynthetic water oxidation.
Biochemistry 2006;45(48):14523-32.
2006: Michael Haumann; Marcos Barra; Paola Loja; Simone Löscher; Roland Krivanek; Alexander Grundmeier; Lars-Erik Andreasson; Holger Dau
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.
Biochemistry 2006;45(43):13101-7.
2006: Simone Löscher; Tanja Burgdorf; Ingo Zebger; Peter Hildebrandt; Holger Dau; Bärbel Friedrich; Michael Haumann
Bias from H2 cleavage to production and coordination changes at the Ni-Fe active site in the NAD+-reducing hydrogenase from Ralstonia eutropha.
Biochemistry 2006;45(38):11658-65.
2006: Ann Magnuson; Peter Liebisch; Joakim E P Högblom; Magnus F Anderlund; Reiner Lomoth; Wolfram Meyer-Klaucke; Michael Haumann; Holger Dau
Bridging-type changes facilitate successive oxidation steps at about 1 V in two binuclear manganese complexes--implications for photosynthetic water-oxidation.
Journal of inorganic biochemistry 2006;100(7):1234-43.
2006: Markus Grabolle; Michael Haumann; Claudia Müller; Peter Liebisch; Holger Dau
Rapid loss of structural motifs in the manganese complex of oxygenic photosynthesis by X-ray irradiation at 10-300 K.
The Journal of biological chemistry 2006;281(8):4580-8.
2006: Sabine Hermes; Oliver Bremm; Florian Garczarek; Valérie Derrien; Peter Liebisch; Paola Loja; Pierre Sebban; Klaus Gerwert; Michael Haumann
A time-resolved iron-specific X-ray absorption experiment yields no evidence for an Fe2+ --> Fe3+ transition during QA- --> QB electron transfer in the photosynthetic reaction center.
Biochemistry 2006;45(2):353-9.
2005: Michael Haumann; Peter Liebisch; Claudia Müller; Marcos Barra; Markus Grabolle; Holger Dau
Photosynthetic O2 formation tracked by time-resolved x-ray experiments.
Science (New York, N.Y.) 2005;310(5750):1019-21.
2005: Jürgen Clausen; Wolfgang Junge; Holger Dau; Michael Haumann
Photosynthetic water oxidation at high O2 backpressure monitored by delayed chlorophyll fluorescence.
Biochemistry 2005;44(38):12775-9.
2005: Simone Löscher; Ingo Zebger; Lars K Andersen; Peter Hildebrandt; Wolfram Meyer-Klaucke; Michael Haumann
The structure of the Ni-Fe site in the isolated HoxC subunit of the hydrogen-sensing hydrogenase from Ralstonia eutropha.
FEBS letters 2005;579(20):4287-91.
2005: Holger Dau; Michael Haumann
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.
Photosynthesis research 2005;84(1-3):325-31.
2005: Marcos Barra; Michael Haumann; Holger Dau
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.
Photosynthesis research 2005;84(1-3):231-7.
2005: Thorsten Buhrke; Simone Löscher; Oliver Lenz; Eberhard Schlodder; Ingo Zebger; Lars K Andersen; Peter Hildebrandt; Wolfram Meyer-Klaucke; Holger Dau; Bärbel Friedrich; Michael Haumann
Reduction of unusual iron-sulfur clusters in the H2-sensing regulatory Ni-Fe hydrogenase from Ralstonia eutropha H16.
The Journal of biological chemistry 2005;280(20):19488-95.
2005: Michael Haumann; Claudia Müller; Peter Liebisch; Lucia Iuzzolino; Jens Dittmer; Markus Grabolle; Thomas Neisius; Wolfram Meyer-Klaucke; Holger Dau
Structural and oxidation state changes of the photosystem II manganese complex in four transitions of the water oxidation cycle (S0 --> S1, S1 --> S2, S2 --> S3, and S3,4 --> S0) characterized by X-ray absorption spectroscopy at 20 K and room temperature.
Biochemistry 2005;44(6):1894-908.
2005: Simone Löscher; Tanja Burgdorf; Thorsten Buhrke; Bärbel Friedrich; Holger Dau; Michael Haumann
Non-standard structures of the Ni-Fe cofactor in the regulatory and the NAD-reducing hydrogenases from Ralstonia eutropha.
Biochemical Society transactions 2005;33(Pt 1):25-7.
2005: Tanja Burgdorf; Simone Löscher; Peter Liebisch; Eddy van der Linden; Marcus Galander; Friedhelm Lendzian; Wolfram Meyer-Klaucke; Simon P J Albracht; Bärbel Friedrich; Holger Dau; Michael Haumann
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.
Journal of the American Chemical Society 2005;127(2):576-92.
2005: Michael Haumann; Claudia Müller; Peter Liebisch; Thomas Neisius; Holger Dau
A novel BioXAS technique with sub-millisecond time resolution to track oxidation state and structural changes at biological metal centers.
Journal of synchrotron radiation 2005;12(Pt 1):35-44.
2004: Ute Christmann; Holger Dau; Michael Haumann; Erzsebet Kiss; Peter Liebisch; Dieter Rehder; Gabriella Santoni; Carola Schulzke
Substrate binding to vanadate-dependent bromoperoxidase from Ascophyllum nodosum: a vanadium K-edge XAS approach.
Dalton transactions (Cambridge, England : 2003) 2004;(16):2534-40.
2003: Michael Haumann; Antje Porthun; Thorsten Buhrke; Peter Liebisch; Wolfram Meyer-Klaucke; Bärbel Friedrich; Holger Dau
Hydrogen-induced structural changes at the nickel site of the regulatory [NiFe] hydrogenase from Ralstonia eutropha detected by X-ray absorption spectroscopy.
Biochemistry 2003;42(37):11004-15.
2003: Holger Dau; Peter Liebisch; Michael Haumann
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.
Analytical and bioanalytical chemistry 2003;376(5):562-83.
2003: Holger Dau; Michael Haumann
X-ray absorption spectroscopy to watch catalysis by metalloenzymes: status and perspectives discussed for the water-splitting manganese complex of photosynthesis.
Journal of synchrotron radiation 2003;10(Pt 1):76-85.
2002: Wolfgang Junge; Michael Haumann; Ralf Ahlbrink; Armen Y Mulkidjanian; Jürgen Clausen
Electrostatics and proton transfer in photosynthetic water oxidation.
Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2002;357(1426):1407-17; discussion 1417-20.
2002: Michael Haumann; Pavel Pospísil; Markus Grabolle; Claudia Müller; Peter Liebisch; V Armando Solé; Thomas Neisius; Jens Dittmer; Lucia Iuzzolino; Holger Dau
First steps towards time-resolved BioXAS at room temperature: state transitions of the manganese complex of oxygenic photosynthesis.
Journal of synchrotron radiation 2002;9(Pt 5):304-8.
2002: Markus Krüer; Michael Haumann; Wolfram Meyer-Klaucke; Rudolf K Thauer; Holger Dau
The role of zinc in the methylation of the coenzyme M thiol group in methanol:coenzyme M methyltransferase from Methanosarcina barkeri.
European journal of biochemistry / FEBS 2002;269(8):2117-23.
2002: Michael Haumann; Markus Grabolle; Thomas Neisius; Holger Dau
The first room-temperature X-ray absorption spectra of higher oxidation states of the tetra-manganese complex of photosystem II.
FEBS letters 2002;512(1-3):116-20.
1999: Michael Haumann; Armen Y Mulkidjanian; Wolfgang Junge
Tyrosine-Z in oxygen-evolving photosystem II: a hydrogen-bonded tyrosinate.
Biochemistry 1999;38(4):1258-67.
1998: Ralf Ahlbrink; Michael Haumann; Dmitry A Cherepanov; O Bögershausen; Armen Y Mulkidjanian; Wolfgang Junge
Function of tyrosine Z in water oxidation by photosystem II: electrostatical promotor instead of hydrogen abstractor.
Biochemistry 1998;37(4):1131-42.
1997: Michael Haumann; Armen Y Mulkidjanian; Wolfgang Junge
Electrogenicity of electron and proton transfer at the oxidizing side of photosystem II.
Biochemistry 1997;36(31):9304-15.
1997: Michael Haumann; Monika Hundelt; P Jahns; S Chroni; O Bögershausen; Demetrios F Ghanotakis; Wolfgang Junge
Proton release from water oxidation by photosystem II: similar stoichiometries are stabilized in thylakoids and PSII core particles by glycerol.
FEBS letters 1997;410(2-3):243-8.
1996: Armen Y Mulkidjanian; Dmitry A Cherepanov; Michael Haumann; Wolfgang Junge
Photosystem II of green plants: topology of core pigments and redox cofactors as inferred from electrochromic difference spectra.
Biochemistry 1996;35(9):3093-107.
1994: Michael Haumann; O Bögershausen; Wolfgang Junge
Photosynthetic oxygen evolution: net charge transients as inferred from electrochromic bandshifts are independent of proton release into the medium.
FEBS letters 1994;355(1):101-5.
1994: Michael Haumann; Wolfgang Junge
The rates of proton uptake and electron transfer at the reducing side of photosystem II in thylakoids.
FEBS letters 1994;347(1):45-50.
1994: Michael Haumann; Wolfgang Junge
Extent and rate of proton release by photosynthetic water oxidation in thylakoids: electrostatic relaxation versus chemical production.
Biochemistry 1994;33(4):864-72.