Thermostable ATP regeneration system using polyphosphate kinase from Thermosynechococcus elongatus BP-1 for d-amino acid dipeptide synthesis

Masaru Sato, Yusuke Masuda, Kotaro Kirimura, Kuniki Kino

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    38 Citations (Scopus)

    Abstract

    d-Alanine-d-alanine ligase from Thermotoga maritima ATCC 43589 (TmDdl) was a useful biocatalyst for synthesizing d-amino acid dipeptides. TmDdl showed a broad substrate specificity at a high temperature; however, ATP was required for its reaction. One of the methods for an effective ATP supply was the coupling reaction with an ATP regeneration system. However, ATP regeneration systems consisted of enzymes from mesophiles and were difficult to operate at high temperatures. Therefore, an ATP regeneration system that could be used at high temperatures was desired to utilize TmDdl for the effective production of d-amino acid dipeptides. To establish a thermostable ATP regeneration system, polyphosphate kinase from a thermophile, Thermosynechococcus elongatus BP-1 (TePpk), was characterized. TePpk showed thermostability up to 70°C; therefore, it was considered that a thermostable ATP regeneration system could be established using TePpk. In the coupling reaction with purified TmDdl and TePpk at 60°C, the amount of ATP required for d-alanyl-d-alanine synthesis could be reduced to 1% of the theoretical amount required when there was no ATP regeneration. When the coupling reaction was applied to a resting cell reaction, ATP was regenerated from an adenosine scaffold in the cell, and d-alanyl-d-alanine was successfully synthesized in the maximum yield of 80% (mol/mol) without the addition of ATP. Thus, an effective synthesis of d-amino acid dipepitides was achieved using the thermostable ATP regeneration system.

    Original languageEnglish
    Pages (from-to)179-184
    Number of pages6
    JournalJournal of Bioscience and Bioengineering
    Volume103
    Issue number2
    DOIs
    Publication statusPublished - 2007 Feb

    Fingerprint

    Dipeptides
    Adenosinetriphosphate
    Amino acids
    Regeneration
    Adenosine Triphosphate
    Amino Acids
    Alanine
    Temperature
    polyphosphate kinase
    Thermotoga maritima
    Biocatalysts
    Enzymes
    Ligases
    Substrate Specificity
    Scaffolds
    Adenosine

    Keywords

    • ATP regeneration
    • d-alanine-d-alanine ligase
    • d-amino acid dipeptide
    • polyphosphate kinase
    • thermophile

    ASJC Scopus subject areas

    • Biotechnology
    • Bioengineering

    Cite this

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    abstract = "d-Alanine-d-alanine ligase from Thermotoga maritima ATCC 43589 (TmDdl) was a useful biocatalyst for synthesizing d-amino acid dipeptides. TmDdl showed a broad substrate specificity at a high temperature; however, ATP was required for its reaction. One of the methods for an effective ATP supply was the coupling reaction with an ATP regeneration system. However, ATP regeneration systems consisted of enzymes from mesophiles and were difficult to operate at high temperatures. Therefore, an ATP regeneration system that could be used at high temperatures was desired to utilize TmDdl for the effective production of d-amino acid dipeptides. To establish a thermostable ATP regeneration system, polyphosphate kinase from a thermophile, Thermosynechococcus elongatus BP-1 (TePpk), was characterized. TePpk showed thermostability up to 70°C; therefore, it was considered that a thermostable ATP regeneration system could be established using TePpk. In the coupling reaction with purified TmDdl and TePpk at 60°C, the amount of ATP required for d-alanyl-d-alanine synthesis could be reduced to 1{\%} of the theoretical amount required when there was no ATP regeneration. When the coupling reaction was applied to a resting cell reaction, ATP was regenerated from an adenosine scaffold in the cell, and d-alanyl-d-alanine was successfully synthesized in the maximum yield of 80{\%} (mol/mol) without the addition of ATP. Thus, an effective synthesis of d-amino acid dipepitides was achieved using the thermostable ATP regeneration system.",
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    AU - Kino, Kuniki

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