Despite this limitation, their study provides a large dataset of mutational effects to which we can compare our results.
To address this issue, we searched for the control-region mutational motif of Q (169-15953G-16255) in the whole GenBank dataset of bovine mtDNA sequences from both modern and ancient samples (a total of 4,770 sequences at the time of our analysis).
These point mutations were compared with a genome-wide collection of high-quality SNPs to assess whether these two datasets of mutational events show similar patterns in terms of distribution and surrounding sequence contexts.
To investigate the correlation between drug treatment and mutational patterns, we compiled six datasets of sequences, summarized in Table 1.
The consistent prediction in mammalian datasets of the G→T,T mutation, ranked second, was unexpected and did not correspond to any characterized mutational bias in mammalian genomes.
The dataset distribution of mutational changes was as follows: transition-type mutations (where a purine is substituted for a purine or pyrimidine for a pyrimidine) made up 74.8% of sequences identified as exonic and 67.8% of sequences identified as intronic.
Two datasets of anonymous samples were used.
The following dataset was generated: Bargavi Thyagarajan, Jesse Bloom, 2014, deep mutational scanning of WSN influenza hemagglutinin, http://www.ncbi.nlm.nih.gov/biosample/SAMN02719578, Publicly available at NCBI BioSample.
This allows investigators to rapidly identify sequence polymorphisms that are disproportionally represented in query datasets, and to discriminate between subtype-specific polymorphisms, sequence quality problems and mutational markers of prior-drug selection pressure.
Taiwan has the highest incidence of upper-urinary-tract cancer in the world, characterized by the mutational signature of BEN.
