The ispH Gen from Escherichia coli is coding for the 1-hydroxy-2-methyl-2-(E)-butenyl-4-diphosphat-reductase (IspH). This enzyme is catalyzing the final reaction of the deoxyxylulose-pathway, which leads to the isopronoid precursors. It could be shown, that the products of this reduction, isopentenylpyrophosphate and dimethylallylpyrophosphate, are formed in a molar ratio of 6:1. Using NMR-spectroscopy, the incorporation of a HSi-ligand from the solvant into position C-2 of isopentenylpyrophosphate could be elucidated. The enzyme was characterized biochemically. A [3Fe-4S]+-cluster was found in ESR-experiments. Additionally, the bifunctional IspDF enzyme from the humanpathogene bacterium Campylobacter jejuni was characterized biochemically.
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The ispH Gen from Escherichia coli is coding for the 1-hydroxy-2-methyl-2-(E)-butenyl-4-diphosphat-reductase (IspH). This enzyme is catalyzing the final reaction of the deoxyxylulose-pathway, which leads to the isopronoid precursors. It could be shown, that the products of this reduction, isopentenylpyrophosphate and dimethylallylpyrophosphate, are formed in a molar ratio of 6:1. Using NMR-spectroscopy, the incorporation of a HSi-ligand from the solvant into position C-2 of isopentenylpyrophosph...
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