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. 1991 Aug 15;88(16):6956–6960. doi: 10.1073/pnas.88.16.6956

Proton NMR investigation into the basis for the relatively high redox potential of lignin peroxidase.

L Banci 1, I Bertini 1, P Turano 1, M Tien 1, T K Kirk 1
PMCID: PMC52212  PMID: 11607206

Abstract

Lignin peroxidase shares several structural features with the well-studied horseradish peroxidase and cytochrome c peroxidase but carries a higher redox potential. Here the heme domain of lignin peroxidase and the lignin peroxidase cyanide adduct was examined by 1HNMR spectroscopy, including nuclear Overhauser effect and two-dimensional measurements, and the findings were compared with those for horseradish peroxidase and cytochrome c peroxidase. Structural information was obtained on the orientation of the heme vinyl and propionate groups and the proximal and distal histidines. The shifts of the epsilon1 proton of the proximal histidine were found to be empirically related to the Fe3+/Fe2+ redox potentials.

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Selected References

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