Jun 7, 1976

Secondary kinase reactions catalyzed by yeast pyruvate kinase

Biochimica Et Biophysica Acta
D J Leblond, J L Robinson

Abstract

1. Yeast pyruvate kinase (EC 2.7.1.40) catalyzes, in addition to the primary, physiologically important reaction, three secondary kinase reactions, the ATP-dependent phosphorylations of fluoride (fluorokinase), hydroxylamine (hydroxylamine kinase) and glycolate (glycolate kinase). 2. These reactions are accelerated by fructose-1,6-bisphosphate, the allosteric activator of the primary reaction. Wth Mg2+ as the required divalent cation, none of these reactions are observed in the absence of fructose-biphosphate. With Mn2+, fructose-bisphosphate is required for the glycolate kinase reaction, but merely stimulates the other reactions. 3. The effect of other divalent cations and pH on three secondary kinase reactions was also examined. 4. Results are compared with those obtained from muscle pyruvate kinase and the implications of the results for the mechanism of the yeast enzyme are discussed.

  • References9
  • Citations5

References

  • References9
  • Citations5

Mentioned in this Paper

Manganese
Nickel
Hydroxylamines
Fructosephosphates
Fluorides
Zinc
Glycolate Ethers
R-Type Pyruvate Kinase
Saccharomyces cerevisiae
Striadyne

About this Paper

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