Publications

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1986

Resonance Raman spectra of rubredoxin: new assignments and vibrational coupling mechanism from iron-54/iron-56 isotope shifts and variable-wavelength excitation, Czernuszewicz, Roman S., Legall Jean, Moura Isabel, and Spiro Thomas G. , Inorganic Chemistry, 1986/02/01, Volume 25, Number 5, p.696-700, (1986) AbstractWebsite

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1983

Resonance Raman spectra of rubredoxin, desulforedoxin, and the synthetic analog Fe(S2-o-xyl)2: conformational effects, Yachandra, Vittal K., Hare Jeffrey, Moura I., and Spiro Thomas G. , Journal of the American Chemical Society, 1983/10/01, Volume 105, Number 21, p.6455-6462, (1983) AbstractWebsite

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1982

Role of vitamin B12 in methyl transfer for methane biosynthesis by Methanosarcina barkeri, Wood, J. M., Moura I., Moura J. J., Santos M. H., Xavier A. V., Legall J., and Scandellari M. , Science, Apr 16, Volume 216, Number 4543, p.303-5, (1982) AbstractWebsite

When Methanosarcina barkeri is grown on methanol as the sole carbon source, a B12-containing protein is synthesized by this organism. This B12 protein contains bound aquocobalamin, and when this cofactor is reduced and methylated with [14C]methyl iodide, the resultant [14C]methyl B12 protein is extremely active in the biosynthesis of 14C-labeled methane. These findings indicate that a B12-dependent system is operative in the biological formation of methane in addition to other systems that are B12-independent.

1981

Resonance Raman spectra of three-iron centers in ferredoxins from Desulfovibrio gigas, Johnson, M. K., Hare J. W., Spiro T. G., Moura J. J., Xavier A. V., and Legall J. , J Biol Chem, Oct 10, Volume 256, Number 19, p.9806-8, (1981) AbstractWebsite

The resonance Raman spectra of ferredoxins (Fd) I and II from Desulfovibrio gigas are reported using 4579 A Ar+ laser excitation. The (3Fe-3S) center in Fd II has a characteristic resonance Raman spectrum, readily distinguishable from those of (2Fe-2S) or (4Fe-4S) clusters. Reduction of Fd II produces a marked alteration in the resonance Raman spectrum. Fd I is shown to contain both (3Fe-3S) and (4Fe-4S) Fd-type clusters. The results illustrate the potential of resonance Raman spectroscopy in Fe-S cluster identification, even in cases where more than one cluster type is present.

1979

Redox studies on rubredoxins from sulphate and sulphur reducing bacteria, Moura, I., Moura J. J., Santos M. H., Xavier A. V., and Legall J. , FEBS Lett, Nov 15, Volume 107, Number 2, p.419-21, (1979) AbstractWebsite

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1977

Redox states of cytochrome c3 in the absence and presence of ferredoxin, Moura, J. J., Xavier A. V., Cookson D. J., Moore G. R., and Williams R. J. , FEBS Lett, Sep 15, Volume 81, Number 2, p.275-80, (1977) AbstractWebsite

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