EPR and redox properties of Desulfovibrio vulgaris Miyazaki hydrogenase: comparison with the Ni-Fe enzyme from Desulfovibrio gigas. |
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| Authors: | M Asso B Guigliarelli T Yagi P Bertrand |
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| Institution: | Laboratoire d'Electronique des Milieux Condensés-URA CNRS 784, Université de Provence, Centre St Jér?me, Marseille, France. |
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| Abstract: | We have carried out a detailed redox titration monitored by EPR on the hydrogenase from Desulfovibrio vulgaris Miyazaki. Typical 3Fe and nickel signals have been observed, which are very similar to those given by Desulfovibrio gigas hydrogenase in all the characteristic redox states of the enzyme. This confirms that D. vulgaris Miyazaki hydrogenase is a Ni-Fe enzyme closely related to that from D. gigas, as was recently proposed on the basis of sequence comparisons (Deckers, H.M., Wilson, F.R. and Voordouw, G. (1990) J. Gen. Microb. 136, 2021-2028). |
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