Allosteric activation in Bacillus stearothermophilus lactate dehydrogenase investigated by an X-ray crystallographic analysis of a mutant designed to prevent tetramerization of the enzyme.


The crystal structure of a mutant Bacillus stearothermophilus lactate dehydrogenase, into which an additional loop has been engineered in order to prevent tetramerization of the enzyme, has been solved and refined at 2.4 A. The minimal repeat unit in the crystal is a dimer and the tetramer cannot be generated by any of the crystallographic symmetry… (More)


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