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Published April 20, 1998 | Supplemental Material
Journal Article Open

Manganese Microperoxidase-8

Abstract

Demetalation of Fe(III) microperoxidase-8 (MP8) by anhydrous HF gives metal-free MP8, a convenient starting material for a wide variety of metal-substituted MP8 derivatives, including Mn(III)MP8. Mn(III)MP8 was produced by treatment of metal-free MP8 with manganous acetate in aerated aqueous solution; it was characterized by mass spectrometry and UV−visible absorption spectroscopy. Resonance Raman spectra suggest that Mn(III)MP8 contains histidine and water axial ligands at neutral pH. The Mn(IV)=O derivative is readily prepared by oxidation of Mn(III)MP8 with hydrogen peroxide or Ru(bpy)_3^(3+) (bpy = 2,2'-bipyridine).

Additional Information

© 1998 American Chemical Society. ReceiVed September 13, 1997. We thank Jane Saunders, Gary Hathaway, and Peter Green for assistance with mass spectrometry. S.A. was a participant in the Caltech SURF program. D.W.L. acknowledges a fellowship from the Parsons Foundation. This work was supported by the NSF.

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August 19, 2023
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