Very general formation of tetrahydropterin cation radicals during reaction of iron porphyrins with tetrahydropterins: model for the corresponding NO-synthase reaction |
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Authors: | Mathieu Delphine Frapart Yves-Michel Bartoli Jean François Boucher Jean-Luc Battioni Pierrette Mansuy Daniel |
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Institution: | UMR 8601, Université Paris V, 45 rue des Saints-Pères, 75270 PARIS Cedex 06, France. |
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Abstract: | Electron transfer from tetrahydropterins to iron porphyrins, with formation of intermediate tetrahydropterin cation radicals, is a very general reaction that was shown to occur not only with tetrahydrobiopterin, as originally found in NO-synthases, but also with another important biological cofactor, tetrahydrofolate, and various iron porphyrins, either in their ferric state, or in the Fe(II)O(2) state, as in the first model of the corresponding NO-synthase reaction described in this paper. |
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