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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Affinity labelling of the allosteric site of the L-lactate dehydrogenase of Lactobacillus casei.

Kinetic investigations employing the substrate analogues 2-oxoglutarate and phospho(enol)pyruvate indicate that the allosteric L-lactate dehydrogenase (EC 1.1.1.27) of Lactobacillus casei has a non-catalytic pyruvate-binding site to which, in addition to pyruvate, the allosteric effector fructose 1,6-bisphosphate can also be found. A modification using the 14C-labelled substrate analogue 3-bromopyruvate induces a loss of regulation by fructose 1,6-bisphosphate. The histidine residue labelled by 3-bromopyruvate is homologous to histidine-188 which is part of the anion-binding site of the non-allosteric vertebrate L-lactate dehydrogenases. Thus, the allosteric site of the allosteric L-lactate dehydrogenases corresponds to the anion-binding site of the non-allosteric vertebrate enzymes.[1]

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