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Synthesis and React...
Synthesis and Reactivity Studies of Model Complexes for Molybdopterin-Dependent Enzymes
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Thapper, Anders (author)
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Lorber, Christian (author)
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Fryxelius, Jacob (author)
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Behrens, Axel (author)
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- Nordlander, Ebbe (author)
- Lund University,Lunds universitet,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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(creator_code:org_t)
- 2000
- 2000
- English.
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In: Journal of Inorganic Biochemistry. - 1873-3344. ; 79:1-4, s. 67-74
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http://dx.doi.org/10...
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Abstract
Subject headings
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- The molybdenum cofactor (Moco)-containing enzymes are divided into three classes that are named after prototypical members of each family, viz. sulfite oxidase, DMSO reductase and xanthine oxidase. Functional or structural models have been prepared for these three prototypical enzymes: (i) The complex [MoO2(mnt)2]2− (mnt2−=1,2-dicyanoethylenedithiolate) has been found to be able to oxidize hydrogen sulfite to HSO4− and is thus a functional model of sulfite oxidase. Kinetic and computational studies indicate that the reaction proceeds via attack of the substrate at one of the oxo ligands of the complex, rather than at the metal. (ii) The coordination geometries of the mono-oxo [Mo(VI)(O-Ser)(S2)2] entity (S2=dithiolene moiety of molybdopterin) found in the crystal structure of R. sphaeroides DMSO reductase and the corresponding des-oxo Mo(IV) unit have been reproduced in the complexes [M(VI)O(OSiR3)(bdt)2] and [M(VI)O(OSiR3)(bdt)2] (M=Mo,W; bdt=benzene dithiolate). (iii) A facile route has been developed for the preparation of complexes containing a cis-Mo(VI)OS molybdenum oxo, sulfido moiety similar to that detected in the oxidized form of xanthine oxidase.
Subject headings
- NATURVETENSKAP -- Biologi -- Biokemi och molekylärbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biochemistry and Molecular Biology (hsv//eng)
Keyword
- Oxotransferase
- Molybdenum cofactor
- Molybdopterin
- Model complexes
Publication and Content Type
- art (subject category)
- ref (subject category)
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