A universal polyphosphate kinase: PPK2c of Ralstonia eutropha accepts purine and pyrimidine nucleotides including uridine diphosphate

Polyphosphosphate kinases (PPKs) catalyse the reversible transfer of the γ-phosphate group of a nucleoside-triphosphate to a growing chain of polyphosphate. Most known PPKs are specific for ATP, but some can also use GTP as a phosphate donor. In this study, we describe the properties of a PPK2-type...

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Veröffentlicht in:Applied microbiology and biotechnology 2020-08, Vol.104 (15), p.6659-6667
Hauptverfasser: Hildenbrand, Jennie C., Teleki, Attila, Jendrossek, Dieter
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Teleki, Attila
Jendrossek, Dieter
description Polyphosphosphate kinases (PPKs) catalyse the reversible transfer of the γ-phosphate group of a nucleoside-triphosphate to a growing chain of polyphosphate. Most known PPKs are specific for ATP, but some can also use GTP as a phosphate donor. In this study, we describe the properties of a PPK2-type PPK of the β-proteobacterium Ralstonia eutropha . The purified enzyme (PPK2c) is highly unspecific and accepts purine nucleotides as well as the pyridine nucleotides including UTP as substrates. The presence of a polyP primer is not necessary for activity. The corresponding nucleoside diphosphates and microscopically detectable polyphosphate granules were identified as reaction products. PPK2c also catalyses the formation of ATP, GTP, CTP, dTTP and UTP from the corresponding nucleoside diphosphates, if polyP is present as a phosphate donor. Remarkably, the nucleoside-tetraphosphates AT(4)P, GT(4)P, CT(4)P, dTT(4)P and UT(4)P were also detected in substantial amounts. The low nucleotide specificity of PPK2c predestines this enzyme in combination with polyP to become a powerful tool for the regeneration of ATP and other nucleotides in biotechnological applications. As an example, PPK2c and polyP were used to replace ATP and to fuel the hexokinase-catalysed phosphorylation of glucose with only catalytic amounts of ADP. Key Points • PPK2c of R. eutropha can be used for regeneration of any NTP or dNTP. • PPK2c is highly unspecific and accepts all purine and pyrimidine nucleotides. • PPK2c forms polyphosphate granules in vitro from any NTP.
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Most known PPKs are specific for ATP, but some can also use GTP as a phosphate donor. In this study, we describe the properties of a PPK2-type PPK of the β-proteobacterium Ralstonia eutropha . The purified enzyme (PPK2c) is highly unspecific and accepts purine nucleotides as well as the pyridine nucleotides including UTP as substrates. The presence of a polyP primer is not necessary for activity. The corresponding nucleoside diphosphates and microscopically detectable polyphosphate granules were identified as reaction products. PPK2c also catalyses the formation of ATP, GTP, CTP, dTTP and UTP from the corresponding nucleoside diphosphates, if polyP is present as a phosphate donor. Remarkably, the nucleoside-tetraphosphates AT(4)P, GT(4)P, CT(4)P, dTT(4)P and UT(4)P were also detected in substantial amounts. The low nucleotide specificity of PPK2c predestines this enzyme in combination with polyP to become a powerful tool for the regeneration of ATP and other nucleotides in biotechnological applications. As an example, PPK2c and polyP were used to replace ATP and to fuel the hexokinase-catalysed phosphorylation of glucose with only catalytic amounts of ADP. Key Points • PPK2c of R. eutropha can be used for regeneration of any NTP or dNTP. • PPK2c is highly unspecific and accepts all purine and pyrimidine nucleotides. • PPK2c forms polyphosphate granules in vitro from any NTP.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><pmid>32500270</pmid><doi>10.1007/s00253-020-10706-9</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0003-3391-0425</orcidid><oa>free_for_read</oa></addata></record>
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subjects Adenosine diphosphate
Adenosine Diphosphate - metabolism
Adenosine triphosphate
Adenosine Triphosphate - metabolism
Alkaloids
ATP
Biomedical and Life Sciences
Biotechnologically Relevant Enzymes and Proteins
Biotechnology
CTP
Cupriavidus necator - enzymology
Cupriavidus necator - genetics
Cytidine triphosphate
Diphosphates
Dithiothreitol
Enzymes
Escherichia coli - genetics
Escherichia coli - metabolism
Granular materials
Guanosine triphosphate
Hexokinase
Kinases
Life Sciences
Microbial Genetics and Genomics
Microbiology
Nucleosides
Nucleotides
Phosphorylation
Phosphotransferases (Phosphate Group Acceptor) - genetics
Phosphotransferases (Phosphate Group Acceptor) - metabolism
Polyphosphate kinase
Purine Nucleotides - metabolism
Pyridine
Pyridine nucleotides
Pyridines
Pyrimidine nucleotides
Pyrimidine Nucleotides - metabolism
Pyrimidines
Ralstonia eutropha
Reaction products
Regeneration
Soil bacteria
Substrates
Uridine
Uridine Diphosphate - metabolism
title A universal polyphosphate kinase: PPK2c of Ralstonia eutropha accepts purine and pyrimidine nucleotides including uridine diphosphate
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