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Inactivation of Maize Leaf Phosphoenolpyruvate Carboxylase by the Binding to Chloroplast Membranes 1

Authors
Publication Date
Source
PMC
Keywords
  • Metabolism And Enzymology
Disciplines
  • Biology

Abstract

Phosphoenolpyruvate carboxylase (PEPC) purified from maize (Zea mays L.) leaves associates with maize leaf chloroplast membrane in vitro. The binding of PEPC to the membrane results in enzyme inactivation. A protein isolated from a maize leaf chloroplast membrane preparation inactivated PEPC. Treatment with membrane preparation or with partially purified inactivating protein accelerates PEPC inactivation at low temperature (4°C). Interaction of PEPC with chloroplast membrane or inactivating protein may inactivate the enzyme by influencing dissociation of the enzyme active tetramer.

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