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The Catalytic Mechanisms of the Molybdenum and Tungsten Enzymes
Structure and Bonding, 2018Molybdenum and tungsten are, respectively, the only second and third transition metal ions with well-defined functions in living organisms and with a single exception are found in association with a novel pyranopterin dithiolene cofactor called molybdopterin.
Graham N. George +2 more
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Inorganic Chemistry Communication, 2008
Abstract First examples of tungsten complexes, (Et4N)2[WO(L0)2]((Et4N)2 [1a]) and (Et4N)2[WO2(L0)2]((Et4N)2 [1b]), containing pyranodithiolene were synthesized as new models of reaction center of tungsten enzymes. The complexes were characterized by IR, UV–Vis, Raman spectroscopies, and cyclic voltammogram (CV). The crystal structures were determined
Kunihisa Sugimoto, Hideki Sugimoto
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Abstract First examples of tungsten complexes, (Et4N)2[WO(L0)2]((Et4N)2 [1a]) and (Et4N)2[WO2(L0)2]((Et4N)2 [1b]), containing pyranodithiolene were synthesized as new models of reaction center of tungsten enzymes. The complexes were characterized by IR, UV–Vis, Raman spectroscopies, and cyclic voltammogram (CV). The crystal structures were determined
Kunihisa Sugimoto, Hideki Sugimoto
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CHAPTER 7. Computational Studies of Molybdenum and Tungsten Enzymes
, 2016 We review computational studies of three important mono-nuclear molybdenum oxo-transfer enzymes, dimethylsulfoxide reductase, sulfite oxidase and xanthine oxidase.
Ulf Ryde +4 more
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A Kinetic Method for Tungsten Determination in Tungsten-Containing Enzymes
Applied Biochemistry and Microbiology, 2001A highly sensitive method for tungsten detection in proteins based on the ability of this metal to catalyze the oxidation of rubeanic acid with hydrogen peroxide is described. The method allows the determination of tungsten in protein samples in the concentration range of 0.05 to 0.4 μg/ml.
A. N. Nosikov +2 more
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The active sites of molybdenum- and tungsten-containing enzymes
Current Opinion in Chemical Biology, 1998Protein X-ray crystallography has revealed the structures of the active sites of several molybdenum- and tungsten-containing enzymes that catalyze formal hydroxylation and oxygen atom transfer reactions. Each molybdenum (or tungsten) atom is coordinated by one (or two) ene-dithiolate groups of a novel pterin (molybdopterin), and the active sites are ...
J, McMaster, J H, Enemark
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Molybdenum and tungsten enzymes: the xanthine oxidase family
Current Opinion in Chemical Biology, 2006Mononuclear molybdenum and tungsten are found in the active site of a diverse group of enzymes that, in general, catalyze oxygen atom transfer reactions. Enzymes of the xanthine oxidase family are the best-characterized mononuclear Mo-containing enzymes. Several 3D structures of diverse members of this family are known.
Carlos D, Brondino +3 more
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Molybdopterin from molybdenum and tungsten enzymes
2001Publisher Summary This chapter focuses on the structural data describing molybdenum cofactor (Moco)-containing enzymes and discusses their respective catalytic mechanisms. The crystal structures of Moco-containing enzymes have revealed a remarkable degree of structural diversity in the overall polypeptide folds, as well as in the composition and ...
H, Schindelin +2 more
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Spectroscopic studies of molybdenum and tungsten enzymes
Coordination Chemistry Reviews, 2011Abstract Molybdenum and tungsten are the only second and third-row transition elements with a known function in living systems. Molybdenum fulfills functional roles in enzyme systems in almost all living creatures, from bacteria through plants to invertebrates and mammals, while tungsten takes the place of molybdenum in some prokaryotes, especially ...
M. Jake Pushie, Graham N. George
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Oxo–tungsten bis-dithiolene complexes relevant to tungsten centres in enzymes
Journal of the Chemical Society, Dalton Transactions, 1998The reaction of [WO2(CN)4]4– with a series of dimethylamino- or thione-protected asymmetric dithiolenes (ene-1,2-dithiolates) has been used to synthesise [WO(dithiolene)2]2– complexes (dithiolene = –SC(H)C(R)S–, R = phenyl, pyridin-2-yl, pyridin-3-yl, pyridin-4-yl or quinoxalin-2-yl), which have been characterised by elemental analysis, spectroscopy ...
E. Stephen Davies +8 more
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