Carboxylierungsreaktionen in Agaricus bisporus III. Pyruvat und Phosphoenolpyruvat als CO2-Acceptoren View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1968-09

AUTHORS

Reinhard Bachofen, Dora Rast

ABSTRACT

Cell-free extracts from Agaricus bisporus catalyze the synthesis of malate, fumarate and aspartate from pyruvate and CO2 in the presence of Mn2+, and from phosphoenolpyruvate and CO2 with Mg2+ (partially replaceable by Mn2+).The carboxylation of pyruvate is highly stimulated by ATP and NADPH2, but is not affected by CoA-esters. The reaction is inhibited by pCMB, oxalate and avidin.The carboxylation of phosphoenolpyruvate is stimulated by ADP, but not by IDP and GDP.From cofactor-requirement and inhibitor studies it is concluded, that there are two enzymes, pyruvatecarboxylase and malic enzyme, which catalyze the carboxylation of pyruvate. Phosphoenolpyruvate carboxykinase is responsible for the CO2-fixation into oxaloacetate.The significance of these three enzymes is discussed in connection with the nutrition of the fungus from its natural growth substrate and with the regulation of glycogenesis and the citric acid cycle. More... »

PAGES

217-234

References to SciGraph publications

  • 1965-12. Zum Abbau der l-Äpfelsäure durch Milchsäurebakterien in ARCHIVES OF MICROBIOLOGY
  • 1967-12. Carboxylierungsreaktionen in Agaricus bisporus in ARCHIVES OF MICROBIOLOGY
  • 1967-12. Carboxylierungsreaktionen in Agaricus bisporus in ARCHIVES OF MICROBIOLOGY
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/bf00413489

    DOI

    http://dx.doi.org/10.1007/bf00413489

    DIMENSIONS

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