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

Effect of Cibacron Blue F3GA on phosphoglycerate kinase of Lactobacillus plantarum and phosphoglycerate mutase of Leuconostoc dextranicum.

Blue dextran or Cibacron Blue F3GA has been shown to inhibit yeast phosphoglycerate kinase [EC] competitively with respect to ATP (Thompson et al. (1975) Proc. Natl. Acad. Sci. U.S. 72, 663--667; Beissner and Rudolph (1979) J. Biol. Chem. 254, 6273--6277). However, we have found that phosphoglycerate kinase of Lactobacillus plantarum was inhibited by Cibacron Blue F3GA, the blue chromophore of blue dextran, noncompetitively with respect to ATP, but competitively with respect to 3-phosphoglycerate. Further inhibition studies with Cibacron Blue F3GA suggest that one molecule of the dye was bound per molecule of phosphoglycerate kinase at a saturated level of either substrate, but two molecules of the dye were bound per molecule of the kinase with an unsaturated level of either substrate used as a fixed substrate. Furthermore, phosphoglycerate mutase [EC] of Leuconostoc dextranicum was also inhibited by Cibacron Blue F3GA competitively with respect to 3-phosphoglycerate and noncompetitively with respect to 2,3-bisphosphoglycerate. These results suggest that the 3-phosphoglycerate-binding site on both phosphoglycerate kinase and phosphoglycerate mutase can interact with Cibacron Blue F3GA.[1]


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