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Fisher, Karl; Lowe, David J; Tavares, Pedro et al. (2007) Conformations generated during turnover of the Azotobacter vinelandii nitrogenase MoFe protein and their relationship to physiological function. J Inorg Biochem 101:1649-56
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Xiao, Yuming; Fisher, Karl; Smith, Matt C et al. (2006) How nitrogenase shakes--initial information about P-cluster and FeMo-cofactor normal modes from nuclear resonance vibrational spectroscopy (NRVS). J Am Chem Soc 128:7608-12
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Durrant, Marcus C; Francis, Amanda; Lowe, David J et al. (2006) Evidence for a dynamic role for homocitrate during nitrogen fixation: the effect of substitution at the alpha-Lys426 position in MoFe-protein of Azotobacter vinelandii. Biochem J 397:261-70
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Fisher, Karl; Dilworth, Michael J; Newton, William E (2006) Azotobacter vinelandii vanadium nitrogenase: formaldehyde is a product of catalyzed HCN reduction, and excess ammonia arises directly from catalyzed azide reduction. Biochemistry 45:4190-8
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Maskos, Zofia; Fisher, Karl; Sorlie, Morten et al. (2005) Variant MoFe proteins of Azotobacter vinelandii: effects of carbon monoxide on electron paramagnetic resonance spectra generated during enzyme turnover. J Biol Inorg Chem 10:394-406
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Fisher, Karl; Newton, William E (2005) Nitrogenase proteins from Gluconacetobacter diazotrophicus, a sugarcane-colonizing bacterium. Biochim Biophys Acta 1750:154-65
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Han, Jaehong; Newton, William E (2004) Differentiation of acetylene-reduction sites by stereoselective proton addition during Azotobacter vinelandii nitrogenase-catalyzed C2D2 reduction. Biochemistry 43:2947-56
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Fisher, K; Newton, W E; Lowe, D J (2001) Electron paramagnetic resonance analysis of different Azotobacter vinelandii nitrogenase MoFe-protein conformations generated during enzyme turnover: evidence for S = 3/2 spin states from reduced MoFe-protein intermediates. Biochemistry 40:3333-9
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Fisher, K; Dilworth, M J; Kim, C H et al. (2000) Azotobacter vinelandii nitrogenases containing altered MoFe proteins with substitutions in the FeMo-cofactor environment: effects on the catalyzed reduction of acetylene and ethylene. Biochemistry 39:2970-9
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Fisher, K; Dilworth, M J; Kim, C H et al. (2000) Azotobacter vinelandii nitrogenases with substitutions in the FeMo-cofactor environment of the MoFe protein: effects of acetylene or ethylene on interactions with H+, HCN, and CN-. Biochemistry 39:10855-65
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