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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 | On the non-transferable utility value: a comment on the Roth-Shafer examples显示文摘 | Aumann R J | 1985 | Econometrica1985，53，： | 1 |
| 3 | Preparation of Targets of Ca, Ba, Fe, La, Pb, Tl, Bi, Th and Uby Electrodeposition From Organic Solutions显示文摘 | Aumann DC Mullen G | 1974 | Nucl Intr and Meth1974，115，： | 1 |
| 4 | Rationality and bounded rationality 显示文摘 | Aumann R | 1997 | Games and Economic Behavior1997，21，： | 1 |
| 5 | Central venous pressure:principles,measurement,and interpretation显示文摘 | Reems MM Aumann M | | 0，，1： | 1 |
| 6 | Interpolation with developable Bézier patches显示文摘 | Aumann G | 1991 | Computer Aided Geometric Design1991，8，5： | 1 |
| 7 | Effects of tiotropium with and without formoterol on airflow obstruction and resting hyperinflation in patients with COPD 显示文摘 | Nood JA Aumann JL Janssens E | 2006 | Chest2006，129，3： | 1 |
| 8 | An Experimental Adaptive Nulling Receiver Utilizing the Sample Matrix Inversion Algorithm with Channel Equalization显示文摘 | JOHNSON J R FENN A J AUMANN H M | 1991 | IEEE Trans on Microwave Theory and Techniques1991，39，5： | 1 |
| 9 | Rationality and bounded rationali-ty显示文摘 | | 1997 | Games and Economic Behavior1997，21，12： | 1 |
| 10 | Cooperative games with coalition structures 显示文摘 | AUMANN R J | 1974 | International Journal of Game Theory1974，，12： | 1 |
| 11 | Agreeing to Disagree 显示文摘 | Aumann | 1976 | Annals of Statistics1976，，4： | 1 |
| 12 | Rationality and bounded rationality 显示文摘 | Aumann Robert J | 1997 | Game and Economic Behavior1997，21，： | 1 |
| 13 | Handbook of Game Theory with Economic Applications 显示文摘 | Hart S | 1992 | New York N Y: NorthHolland1992，1，2： | 1 |
| 14 | Efficiency optimization potential in supercritical Organic Rankine Cycles显示文摘 | Schuster A Karellas S Aumann R | 2010 | Energy2010，35，2： | 1 |
| 15 | Diversity of glutathione peroxidases 显示文摘 | Maiorino F M Brigelius-Floh6 R Aumann K D | 1995 | Methods in En- zymology1995，252，： | 1 |
| 16 | Comparison of tiotropium once daily,fomloterol twice daily and both combined once daily in patients with COPD显示文摘 | Nood JA Aumann JI Janssens E | 2005 | Eur Respir J2005，26，3： | 1 |
| 17 | AIRS/AMSU/HSB on the Aqua Mission: Design, Science Obiectives, Data Products, and Processing Systems显示文摘 | Aumann H H | 2003 | IEEE Transactions on Geoscience and Remote Sens ing2003，41，2： | 1 |
| 18 | Integrals of set-valued function显示文摘 | Aumann R J | 1965 | J Math Anal Appl1965，12，： | 1 |
| 19 | Cooperation and bounded recall显示文摘 | Aumann R J Sorin S | 1989 | Games and Economic Behavior1989，1，1： | 1 |
| 20 | AIRS/AMSU/HSB on the aqua mission : Design, science objectives, data products, and processing systems显示文摘 | Aumann H H Chahine M T Gautier C | 2003 | IEEE Transactions on Geoscience and Re- mote Sensing2003，41，2： | 1 |
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