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Characterization of a dUTPase from the hyperthermophilic archaeon Thermococcus onnurineus NA1 and its application in polymerase chain reaction amplification
Cho, Y.; Lee, H.S.; Kim, Y.J.; Kang, S.G.; Kim, S.J.; Lee, J.-H. (2007). Characterization of a dUTPase from the hyperthermophilic archaeon Thermococcus onnurineus NA1 and its application in polymerase chain reaction amplification. Mar. Biotechnol. 9(4): 450-458. https://dx.doi.org/10.1007/s10126-007-9002-8
In: Marine Biotechnology. Springer-Verlag: New York. ISSN 1436-2228; e-ISSN 1436-2236, meer
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Acids > Organic compounds > Organic acids > Nucleic acids > DNA
    DNA polymerase
    PCR
    Peptides > Proteins > Enzymes > Transferases > Nucleotidyltransferases > Dna polymerase
    Polymerase chain reaction
    Thermococcus onnurineus Bae, Kim, Yang, Lim, Heon, Lee, Kang, Kim & Lee, 2006 [WoRMS]
    Marien/Kust
Author keywords
    DNA polymerase; dUTPase; PCR amplification; Thermococcus onnurineus NA1
Auteurs  Top 
  • Cho, Y.
  • Lee, H.S.
  • Kim, Y.J.
  • Kang, S.G.
  • Kim, S.J.
  • Lee, J.-H.
Abstract
    Genomic analysis of the hyperthermophilic archaeon Thermococcus onnurineus NA1 (TNA1) revealed the presence of a 471-bp open reading frame with 93% similarity to the dUTPase from Pyrococcus furiosus. The dUTPase-encoding gene was cloned and expressed in Escherichia coli. The purified protein hydrolyzed dUTP at about a 10-fold higher rate than dCTP. The protein behaved as a dimer in gel filtration chromatography, even though it contains five motifs that are conserved in all homotrimeric dUTPases. The dUTPase showed optimum activity at 80°C and pH 8.0, and it was highly thermostable with a half-life (t 1/2) of 170 min at 95°C. The enzymatic activity of the dUTPase was largely unaffected by variations in MgCl2, KCl, (NH 4)2SO4, and Triton X-100 concentrations, although it was reduced by bovine serum albumin. Addition of the dUTPase to polymerase chain reactions (PCRs) run with TNA1 DNA polymerase significantly increased product yield, overcoming the inhibitory effect of dUTP. Further, addition of the dUTPase allowed PCR amplification of targets up to 15 kb in length using TNA1 DNA polymerase. This enzyme also improved the PCR efficiency of other archaeal family B type DNA polymerases, including Pfu and KOD.
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