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| 1 | Glutathione Peroxidase Revisited—Simulation of the Catalytic Cycle by Computer-Assisted Molecular Modelling显示文摘Glutathione peroxidase, the first example of selenoproteins identified in mammals, was subjected to force field calculations and molecular dynamics in order to enable a clearer comprehension of enzymatic selenium catalysis. Starting from the established X-ray structure of bovine GPX, all kinetically defined intermediates and enzyme substrate complexes were modelled. The models thus obtained support the hypothesis that the essential steps of the catalysis are three distinct redox changes of the active site selenium which, in the ground state, presents itself at the surface of selenoperoxidases as the center of a characteristic triad built by selenocysteine, glutarnine and tryptophan. In GPX, four arginine residues and a lysine residue provide an electrostatic architecture which, in each reductive step, directs the donor substrate GSH towards the catalytic center in such a way that 1ts sulfhydryl group must react with the selenium moiety. To this end, different equally efficient modes of substrate binding appear possible. The models are consistent with substrate specificity data, kinetic pattern and other functional characteristics of the enzyme. Comparison of molecular models of GPX with those of other members of the GPX superfamily reveals that the cosubstrate binding mechanisrns are unique for the classical type of cytosolic glutathione peroxidases but cannot operate e. g. in plasma GPX and phospholipid hydroperoxide GPX. The structural differences between the selenoperoxidases, shown to be relevant to their specificities, are discussed in terms of functional diversification within the GPX | K. -D. AUMANN N. BEDORF R. BRIGELIUS-FLOHED D. SCHOMBURG AND L. FLOHE(Gesellschaft fur Biotechnologische Forschung mbH (GBF) Mascheroder Weg 1, D-38124 Braunschweig, Germany Deutsches Institut fur Ernahrungsforschung (DIfE) Arthur-Scheunert-Allee 114 | 1997 | Biomedical and Environmental Sciences1997，10，2： | 6 |
| 2 | GC–MS libraries for the rapid identification of metabolites in complex biological samples显示文摘 | Nicolas Schauer Dirk Steinhauser Sergej Strelkov Dietmar Schomburg Gordon Allison Thomas Moritz Krister Lundgren Ute Roessner-Tunali Megan G. Forbes Lothar Willmitzer Alisdair R. Fernie Joachim Kopka | 2005 | FEBS Letters2005，，6： | 2 |
| 3 | Autonomic seizures versus syncope in 18q-deletion syndrome:a case report显示文摘 | Sturm K Knake S Schomburg U | 2000 | Epilepsia2000，41，8： | 1 |
| 4 | Capillary electrophoresis of DNA restriction fragments with solutions of entangled polymers 显示文摘 | Kleemiss MH Gilges M Schomburg G | 1993 | Electrophoresis1993，14，： | 1 |
| 5 | 3d-Structures of the lipase from Rbizomucor-Miehei at different temperatures and computer modeling of a complex of the l ipase with Trilauryl glycerol显示文摘 | Vasel B Hecht H J Schmid R D Schomburg D | 1993 | Journal of Biotechnology1993，28，1： | 1 |
| 6 | Selenium and seleno- proteins in mammals : extrodinary, essential, enigmatic 显示文摘 | L Schomburg U Schweizer J Kohrle | 2004 | CMLS Cell Mol Life Sci2004，61，： | 1 |
| 7 | Methods and techniques of gas chromatography with glass capillary columns显示文摘 | G. Schomburg H. Husmann | 1975 | Chromatographia1975，，9： | 1 |
| 8 | Isoflavones in seeds of Field-Grown Soybean:Variation Among Genetic Lines and Environmental Effects显示文摘 | Britz S J Schomburg C J kenworthy WJ | | 0，，06： | 1 |
| 9 | Selenoproteins of the thyroid gland: expression, localization and possible function of glutathione peroxidase显示文摘 | Schmutzler C Mentrup B Schomburg L | 2007 | Biol Chem2007，388，10： | 1 |
| 10 | Largescale production, purification and refolding of the full-length cellular prion protein from Syrian golden hamster in Escherichia coli using the glutathione Stransferase-fusion system 显示文摘 | Volkel D Blankenfeldt W Schomburg D | 1998 | Eur J Biochem1998，251，12： | 1 |
| 11 | Fluorine-18-Fluorodeoxyglucose Positron Emission Tomography in the Follow-up of Differentiated Thyroid Cancer显示文摘 | Grunwald F Schomburg A Bender H | 1996 | Eur J Nucl Med1996，23，3： | 1 |
| 12 | FPA,a gene involved in floral induction in Arabidopsis ,encodes a protein containing RNA-recognition motif显示文摘 | SCHOMBURG F M PATTON D A MEINKE D W | 2001 | Plant Cell2001，13，： | 1 |
| 13 | Mobilite international des etudiants et debuts de vie active 显示文摘 | SCHOMBURG H TEICHLER U | 2008 | Formation emploi2008，103，： | 1 |
| 14 | Inflavones inseeds of field - grown soybean : Variation among genetic lines and environmental effects 显示文摘 | Britz S J Schomburg C J Kenworthyw J | 2011 | Journal of the Amer- ican oil Chemsts Society2011，88，6： | 1 |
| 15 | Pressure sensor from a PVDF film显示文摘 | Shirinov A V Schomburg W K | | 0，，01： | 1 |
| 16 | Selenoprotein P in seminal fluid is a novel biomarker of sperm quality显示文摘 | Marten Michaelis Oliver Gralla Thomas Behrends Marcus Scharpf Tobias Endermann Eddy Rijntjes Nicole Pietschmann Birgit Hollenbach Lutz Schomburg | 2013 | Biochemical and Biophysical Research Communications2013，，： | 1 |
| 17 | Magnetically driven micro ball valves fabricated by multilayer adhesive film bonding 显示文摘 | FU C RUMMLER Z SCHOMBURG W | 2003 | Micromech Microeng2003，13，4： | 1 |
| 18 | Synthesis and metabolism of thyroid hormones is preferentially maintained in selenium - deficient transgenic mice显示文摘 | Schomburg L Riese C Michaelis M | 2006 | Endocrinology2006，147，3： | 1 |
| 19 | Review on micro molding of thermoplastic polymers显示文摘 | HECKELE M SCHOMBURG W K | 2004 | Journal of Micromechanics and Microengineering2004，20，14： | 1 |
| 20 | Selenium supple- mentation fails to correct the selenoprotein synthesis defect in subjects with SBP2 gene mutations 显示文摘 | Schomburg L Dumitrescu AM Liao XH | 2009 | Thyroid2009，19，3： | 1 |
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