Summary
Crude extracts from Hydrogenomonas eutropha strain H 16 catalyze the biosynthesis of phosphoenolpyruvate from pyruvate and adenosine triphosphate. Under identical conditions extracts from Escherichia coli synthesized phosphoenol-pyruvate from pyruvate also.
The reaction product phosphoenolpyruvate has been identified by paper chromatography, by employing radioactive pyruvate and by a coupled enzyme assay, using a purified preparation of 3-deoxy-d-arabino-heptulonic acid-7-phosphate synthase. AMP has been found as the second product of the PEP-synthase reaction. From these results it is concluded that strain H 16 contains an enzyme phosphorylating pyruvate directly.
Zusammenfassung
Zellfreie Extrakte aus Hydrogenomonas eutropha Stamm H 16 katalysieren die Biosynthese von Phosphoenolpyruvat aus Pyruvat und Adenosintriphosphat. Unter identischen Bedingungen erfolgte diese Synthese auch durch Extrakte aus Escherichia coli.
Das Reaktionsprodukt Phosphoenolpyruvat wurde durch Papierchromatographie, durch Anwendung von radioaktivem Pyruvat und durch einen gekoppelten enzymatischen Test unter Einsatz eines gereinigten Präparates von 3-Desoxy-d-arabino-heptulosonsäure-7-phosphat Synthase, AMP wurde als zweites Produkt der PEP-Synthasereaktion nachgewiesen. Die Versuchsergebnisse lassen darauf schließen, daß der Stamm H 16 über ein Enzym verfügt, welches Pyruvat direkt phosphoryliert.
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Abbreviations
- DAHP:
-
3-Desoxy-d-arabino-heptulosonsäure-7-phosphat
- DTT:
-
Dithiothreitol
- PEP:
-
Phosphoenolpyruvat
- P:
-
ortho-Phosphat
- PP:
-
Pyrophosphat
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Frings, W., Schlegel, H.G. Synthese von Phosphoenolpyruvat aus Pyruvat durch Extrakte aus Hydrogenomonas eutropha Stamm H 16 . Archiv. Mikrobiol. 79, 220–230 (1971). https://doi.org/10.1007/BF00408785
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DOI: https://doi.org/10.1007/BF00408785