Analysis of the amino acid residues involved in the thermal properties of the monomeric isocitrate dehydrogenases of the psychrophilic bacterium Colwellia maris and the mesophilic bacterium Azotobacter vinelandii.

Abstract excerpt

Cold-adapted monomeric isocitrate dehydrogenase of a psychrophilic bacterium, Colwellia maris, (CmIDH) showed a high degree of amino acid sequential identity (69.5%) to a mesophilic nitrogen-fixing bacterium, Azotobacter vinelandii, (AvIDH). In this study, three Ala residues of CmIDH and the corresponding Pro residues of AvIDH were exchanged by site-directed mutagenesis, and several properties of single, double,...

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