4.7 Article

MoV electron paramagnetic resonance of sulfite oxidase revisited:: The low-pH chloride signal

Journal

INORGANIC CHEMISTRY
Volume 47, Issue 6, Pages 2033-2038

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/ic7017083

Keywords

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Funding

  1. NIBIB NIH HHS [P41 EB001980, P41 EB001980-31, EB001980] Funding Source: Medline
  2. NIGMS NIH HHS [R01 GM000091, GM 00091] Funding Source: Medline

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Valuable information on the active sites of molybdenum enzymes has been provided by Mo-V electron paramagnetic resonance (EPR) spectroscopy. In recent years, multiple resonance techniques have been extensively used to examine details of the active-site structure, but basic continuous-wave (CW) EPR has not been re-evaluated in several decades. Here, we present a re-examination of the CW EPR spectroscopy of the sulfite oxidase low-pH chloride species and provide evidence for direct coordination of molybdenum by chloride.

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