On average, the mutational properties (per-generation change in mean relative fitness, mutational variance, and Bateman-Mukai estimates of genomic mutation rate and average mutational effect) of the high-fitness and low-fitness did not differ significantly, and averaged over all lines, the point estimates were extremely close to those of the first-order MA experiment after 200 generations of MA.
In 1979 he was chairman of an academy committee on the mutational effect of environmental chemicals.
22– 29 We previously characterized the individual or collective mutational effect of Tyr, Thr, and Ser of Gh-TDH on hemolytic activity, the Arrhenius effect, and biophysical properties, and identified its hepatotoxicity.
Mutational effect of recombination or biased gene conversion can also operate, but this needs to be confirmed as even in Drosophila, the effect of biased gene conversion is only suspected but unwarranted [ 22, 23].
Because the most deleterious mutations are expected to be ephemeral (Fu et al. 2013; Kiezun et al. 2013), in order to accurately quantify the mutational effect of the repetitive sequences and the selection acting on variation surrounding these regions, the analysis needs to focus on the comparison of closely related species or individuals within the same species.
A lack of discrimination on 3′ nucleotides was also shown in vitro for APOBEC3B (Burns et al., 2013), and reflected in the mutational effect of APOBECs on HIV (Bishop et al., 2004; Doehle et al., 2005), and in this case the very low preference toward TpCpG (opposite strand CpGpA), reflected the strong bias against CpG in the HIV genome (van der Kuyl and Berkhout, 2012).
In silico analyses of the mutational effect on pre-mRNA splicing were inconsistent.
In this study, we have established an in vivo assay system to analyze mutational effects of Ralstonia eutropha polymerase (termed PhbCRe) on the level of PHB accumulation in recombinant strains of Escherichia coli.
Among the main findings are a major conformational change (>20 Å) in the catalytic loop, which revealed a gatinglike dynamics, and a transient intraloop structure, which provided a rationale for the mutational effects of several residues on the loop including Q148, P145, and Y143.
The mutational effects of other amino acid changes, however, are less straightforward, in part because the regulation mechanism of irrE itself has not been elucidated.
Evidence comes from the study of mutational effects of individual proteins [ 25].
