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Escherichia coli 5′-nucleotidase is a two-domain enzyme exhibiting a unique 96° domain motion that is required for catalysis. Here we present an integrated structural biology study that combines DEER distance distributions with structural information from X-ray crystallography and computational biology to describe the population of presumably almost isoenergetic open and closed states in solution...
The major AP endonuclease in Escherichia coli Exonuclease III (ExoIII) is frequently used in gene technology due to its strong exonucleolytic activity. A thermostabilized variant of ExoIII or a homologous enzyme from thermophilic organisms could be most useful for further applications. For this purpose we characterized a nuclease from the hyperthermophilic archaeon Archaeoglobus fulgidus (Af_Exo),...
Arylmalonate decarboxylase (AMDase) from Bordetella bronchiseptica catalyzes the enantioselective decarboxylation of arylmethylmalonates without the need for an organic cofactor or metal ion. The decarboxylation reaction is of interest for the synthesis of fine chemicals. As basis for an analysis of the catalytic mechanism of AMDase and for a rational enzyme design, we determined the X-ray structure...
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