Interactions of Phosphoenolpyruvate Carboxylase and Pyruvic Kinase in Developing Soybean Seeds

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概要

• 論文の詳細を見る

• Developing soybean seeds contain phosphoenolpyruvate (PEP) carboxylase, pyruvic kinase, malate dehydrogenase, aspartate aminotransferase, alanine aminotransferase and malic enzyme activities. PEP carboxylase may be important in competing with pyruvic kinase and directing a portion of glycolytic carbon towards oxaloacetate synthesis. The oxaloacetate can then be converted to aspartate and malate. Malic enzyme produces pyruvate and NADPH from malate, and this may be an important additional source of reducing power for lipid biosynthesis. In the presence of high levels of PEP carboxylase it is possible to demonstrate PEP formation by pyruvic kinase. PEP carboxylase and pyruvic kinase independently compete for PEP in a mixed system. Soybean seed extracts readily converted radioactive PEP into alanine and aspartate when supplemented with ADP, Mg^<2+>, K^+, HCO_3^- and glutamate. Under varying conditions of pH, metal ions, PEP, enzyme concentration and time both alanine and aspartate were always produced. Possibly the final products of glycolysis should be considered as pyruvate and oxaloacetate in plants.

• 日本植物生理学会の論文

著者

• Rinne Rovert

  Department Of Agronomy And Usda-sea-ar University Of Illinois Urbana

• Adams Clifford

  Department of Agronomy and USDA-SEA-AR, University of Illinois Urbana

• Adams Clifford

  Department Of Agronomy And Usda-ars University Of Illinois

• Adams Clifford

  Department Of Agronomy And Usda-sea-ar University Of Illinois Urbana

関連論文

• Interactions of Phosphoenolpyruvate Carboxylase and Pyruvic Kinase in Developing Soybean Seeds
• Use of [3,4-^C] Glucose to Assess in vivo Competition for Phosphoenolpyruvate Between Phosphoenolpyruvate Carboxylase and Pyruvate Kinase in Developing Soybean Seeds

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