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Literature DB >> 16656561

CO(2) Metabolism in Corn Roots. II. Intracellular Distribution of Enzymes.

Abstract

Three enzymes assumed to mediate CO(2) metabolism in corn root tips, P-enolpyruvate carboxylase, malic dehydrogenase, and the malic enzyme, were extracted to determine their relative specific activities and their partitioning between soluble and particulate fractions. The data indicated that the intracellular location of these 3 enzymes is nonparticulate and thus these enzymatic reactions of CO(2) metabolism are apparently nonparticulate. The soluble malic dehydrogenase fraction differed from the particulate fraction in several kinetic properties, viz., response to the thionicotinamide analog of nicotinamide-adenine dinucleotide, oxaloacetate substrate inhibition at pH 8.3, and Km's for nicotinamide-adenine dinucleotide and l-malate. It was concluded that the soluble-malic dehydrogenase differed from the particulate forms in both structure and function. The soluble malic dehydrogenase is apparently involved in CO(2) metabolism.

Entities: Chemical Species

Year: 1967 PMID： 16656561 PMCID： PMC1086608 DOI： 10.1104/pp.42.5.719

Source DB: PubMed Journal: Plant Physiol ISSN： 0032-0889 Impact factor: 8.340

13 in total

6. Carbon Dioxide Fixation by Lupin Root Nodules: I. Characterization, Association with Phosphoenolpyruvate Carboxylase, and Correlation with Nitrogen Fixation during Nodule Development.

Authors: J T Christeller; W A Laing; W D Sutton
Journal: Plant Physiol Date: 1977-07 Impact factor: 8.340

7. Anaerobic Accumulation of gamma-Aminobutyric Acid and Alanine in Radish Leaves (Raphanus sativus, L.).

Authors: J G Streeter; J F Thompson
Journal: Plant Physiol Date: 1972-04 Impact factor: 8.340

8. CO(2) Metabolism in Corn Roots. III. Inhibition of P-enolpyruvate Carboxylase by l-malate.

Authors: I P Ting
Journal: Plant Physiol Date: 1968-12 Impact factor: 8.340

9. Bicarbonate Fixation and Malate Compartmentation in Relation to Salt-induced Stoichiometric Synthesis of Organic Acid.

Authors: B Jacoby; G G Laties
Journal: Plant Physiol Date: 1971-04 Impact factor: 8.340

10. Carbon dioxide effects on fruits : III. The fixation of C(14)O 2 in lemon in an atmosphere enriched with carbon dioxide.

Authors: R E Young; J B Biale
Journal: Planta Date: 1968-09 Impact factor: 4.116

CO(2) Metabolism in Corn Roots. II. Intracellular Distribution of Enzymes.

1. Malic dehydrogenase. IV. pH dependence of the kinetic parametrs.

2. Further studies on the enzymatic synthesis of oxalacetate from phosphorylenolpyruvate and carbon dioxide.

3. Carbon Dioxide Fixation into Oxalacetate in Higher Plants.

4. Intracellular location and possible function of malic dehydrogenase isozymes from young maize root tissue.

5. Fixation of Carbon Dioxide in Particulate Preparations from Barley Roots.

6. Transhydrogenation in Root Tissue: Mediation by Carbon Dioxide.

Review 7. The role of CO2 fixation in metabolism.

8. Dark CO(2) Fixation and its Role in the Growth of Plant Tissue.

9. Purification and properties of apple fruit malic enzyme.

10. Compartmentation of Organic Acids in Corn Roots II. The Cytoplasmic Pool of Malic Acid.

1. Immunocytochemical study of phosphoenolpyruvate carboxylase in nodulated Alnus glutinosa.

2. A possible plasma membrane particle containing malic enzyme activity.

3. Intracellular location of NADP(+)-linked malic enzyme in C 3 plants.

4. Two forms of NADP-dependent malic enzyme in expanding maize leaves.

5. Interaction between electron transport at the plasma membrane and nitrate uptake by maize (Zea mays L.) roots.

6. Carbon Dioxide Fixation by Lupin Root Nodules: I. Characterization, Association with Phosphoenolpyruvate Carboxylase, and Correlation with Nitrogen Fixation during Nodule Development.

7. Anaerobic Accumulation of gamma-Aminobutyric Acid and Alanine in Radish Leaves (Raphanus sativus, L.).

8. CO(2) Metabolism in Corn Roots. III. Inhibition of P-enolpyruvate Carboxylase by l-malate.

9. Bicarbonate Fixation and Malate Compartmentation in Relation to Salt-induced Stoichiometric Synthesis of Organic Acid.

10. Carbon dioxide effects on fruits : III. The fixation of C(14)O 2 in lemon in an atmosphere enriched with carbon dioxide.