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Regulation of Pyruvate,Orthophosphate Dikinase From Maize Leaves.Magnesium-dependent Dimer-tetramer Interconversion

  • Hitoshi Nakamoto

Abstract

Pyruvate, orthophosphate dikinase(PPDK, EC 2.7.9.1.), a key enzyme in the C4 pathway of photosynthesis, catalyzes the formation of phosphoenolpyruvate(PEP) as follows: Pyruvate + MgATP + Pi = PEP + AMP + MgPPi The amount of magnesium ion required for the reaction appears to be much more than that required for the formation of MgATP and MgPPi complexes(1). The plant enzyme is a homotetramer and dissociates to inactive dimer or monomer in the absence of magnesium ion or under cold treatment(1).

Keywords

Closed Circle Elution Profile Incubation Mixture Quaternary Structure Basic Buffer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Edwards, G.E.,Nakamoto, H.,Burnell, J.N. and Hatch, M.D. (1985) Ann.Rev. Plant Physiol. 36, 255–286.CrossRefGoogle Scholar
  2. 2.
    Nakamoto, H. and Edwards, G.E. (1987) Biochim.Biophys.Acta 924,360–368.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Hitoshi Nakamoto
    • 1
  1. 1.Dept of Biochemistry, Faculty of ScienceSaitama UniversityUrawa, Saitama 338Japan

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