Furthermore, we hope that this report will remind laboratorians of the need to understand the amplification characteristics of the thermostable
DNA polymerases that they use for PCR-based assays and to periodically review frequently updated SNP databases for uncommon polymorphisms that could disrupt amplification of any given target sequence.
It also inhibits B-family
DNA polymerases from eukaryotes [18-21], bacteria [22] and viruses [14; 23-25].
KlenTaq 1 (
DNA Polymerase Technology) and Taq (New England BioLabs) were used in this study.
As an enzyme for PCR, we used the following types of DNA-dependent
DNA polymerases: Taq
DNA polymerase, Tersus
DNA polymerase, Deep Vent
DNA polymerase and Phusion
DNA polymerase.
Hogrefe, "PCR fidelity of Pfu
DNA polymerase and other thermostable
DNA polymerases," Nucleic Acids Research, vol.
The concentrations used for each
DNA polymerase are specified in the respective figure legends.
However, researchers have been trying to produce such enzyme from various versions of Taq
DNA polymerase gene via genetic engineering.
Another tenable explanation for the presence of multiple specialised
DNA polymerases in vertebrates is that each evolved to accurately bypass a particular type of naturally occurring base damage.
Thus,
DNA polymerases might sensitively recognize the [gamma]-amidotriphosphate moiety of the substrates, and the geometrical fluctuation caused by non-cognate pairings, such as Ds-Ds and A-Pa, significantly reduces the interaction between the amino acid residues in the polymerase and the [gamma]-amidotriphosphate moiety, resulting in the loss of the function of the amidodiphosphate part as a leaving group, like the pyrophosphate moiety of triphosphate substrates.
Cloning and sequencing of lcr1 by Pfu
DNA polymerase: To determine whether the sequence variants were created during PCR due to Taq polymerase error, lcr1 was amplified from the parasite genomic DNA by Pfu
DNA polymerase (Fermentas Co., Ontario, Canada) which exhibits 3'[right arrow]5' exonuclease (proof reading) activity according to manufacturer's instructions.
Studies will determine the in vivo roles of
DNA polymerases and other proteins likely to be involved in UV mutagenesis.