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Reaction of pyridoxal 5′-phosphate with TRIS

Reaktion von Pyridoxal-5′-phosphat mit TRIS

  • Organische Chemie Und Biochemie
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Abstract

Kinetic and equilibrium studies are presented on the reaction of pyridoxal 5′-phosphate withTris. Upon raising thepH from 7.3 to 9.3 at 25°C, the second-order rate constant increases from 1.05 M−1 s−1 to 3.79 M−1 s−1, whereas the apparent dissociation constant varies from 2 to 8 mM. These results demonstrate the significance of this reaction whenTris buffer is used in studies of pyridoxal 5′-phosphate-dependent enzymes.

Zusammenfassung

Es werden Untersuchungen über die Kinetik und das Gleichgewicht der Reaktion von Pyridoxal-5′-phosphat mitTRIS vorgelegt. Wenn derpH bei 25°C von 7,3 auf 9,3 erhöht wird, steigt die Geschwindigkeitskonstante zweiter Ordnung von 1,05 M−1 s−1 auf 3,79 M−1 s−1, während die scheinbare Dissoziationskonstante sich im Bereich von 2 bis 8 mM verändert. Die Ergebnisse zeigen, welche Bedeutung diese Reaktion für Untersuchungen von Pyridoxal-5′-phosphat-abhängigen Enzymen bei Verwendung vonTRIS-Puffer hat.

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Davis, M.D., Edmondson, D.E. & McCormick, D.B. Reaction of pyridoxal 5′-phosphate with TRIS. Monatsh Chem 113, 999–1004 (1982). https://doi.org/10.1007/BF00799241

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  • DOI: https://doi.org/10.1007/BF00799241

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