Synonymous and nonsynonymous rate variation in nuclear genes of mammals
@article{Yang2009SynonymousAN, title={Synonymous and nonsynonymous rate variation in nuclear genes of mammals}, author={Ziheng Yang and Rasmus Nielsen}, journal={Journal of Molecular Evolution}, year={2009}, volume={46}, pages={409-418} }
A maximum likelihood approach was used to estimate the synonymous and nonsynonymous substitution rates in 48 nuclear genes from primates, artiodactyls, and rodents. A codon-substitution model was assumed, which accounts for the genetic code structure, transition/transversion bias, and base frequency biases at codon positions. Likelihood ratio tests were applied to test the constancy of nonsynonymous to synonymous rate ratios among branches (evolutionary lineages). It is found that at 22 of the…
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References
SHOWING 1-10 OF 26 REFERENCES
Synonymous and nonsynonymous substitutions in mammalian genes and the nearly neutral theory
- BiologyJournal of Molecular Evolution
- 2004
The rate and pattern found here are consistent with the nearly neutral theory, such that the relative contributions of drift and selection differ between the two types of substitutions, and are also consistent with Gillespie's episodic selection theory.
A likelihood approach for comparing synonymous and nonsynonymous nucleotide substitution rates, with application to the chloroplast genome.
- BiologyMolecular biology and evolution
- 1994
Simulations help confirm previous suggestions that silent sites are saturated, leaving no evidence of heterogeneity in synonymous substitution rates, and confirm previous findings that substitution rates in the chloroplast genome are subject to both lineage-specific and locus-specific effects.
Unbiased estimation of the rates of synonymous and nonsynonymous substitution
- BiologyJournal of Molecular Evolution
- 2006
A new method that gives unbiased estimates is proposed and an application of the new and the old method to 14 pairs of mouse and rat genes shows that the new method gives aKS value very close to the number of substitutions per fourfold degenerate site whereas the oldmethod gives a value 30% higher.
Pattern of synonymous and nonsynonymous substitutions: An indicator of mechanisms of molecular evolution
- BiologyJournal of Genetics
- 2008
When the transition/transversion bias at the mutation level is strong, the numbers of synonymous and nonsynonymous substitutions are estimated more accurately by the PBL and Ina methods than by the NG, MY and LWL methods.
A method for estimating the numbers of synonymous and nonsynonymous substitutions per site
- BiologyJournal of Molecular Evolution
- 2004
Computer simulations indicate that the method presented gives more accurate Ks and Ka estimates than the aforementioned methods, and the obtention of confidence intervals for divergence estimates by computer simulation is proposed.
Correlated rates of synonymous site evolution across plant genomes.
- BiologyMolecular biology and evolution
- 1997
It is shown that grasses evolve more rapidly than palms at synonymous sites in a mitochondrial, a nuclear, and a plastid gene, and that the relative rates of synonymous substitution between grasses and palms are similar at the three loci.
Consistent variation in amino-acid substitution rate, despite uniformity of mutation rate: protein evolution in mammals is not neutral.
- BiologyMolecular biology and evolution
- 1994
It is shown that substitution rates at fourfold-degenerate sites and at sites in noncoding regions do not vary between the primate and rodent lineages, implying mutation-rate uniformity, and that this difference in substitution-rate pattern between the two types of site is incompatible with neutral theory.
Molecular evolution of mRNA: A method for estimating evolutionary rates of synonymous and amino acid substitutions from homologous nucleotide sequences and its application
- BiologyJournal of Molecular Evolution
- 2005
It is suggested that, in the coding regions surrounding the splicing points of intervening sequences ofβ-globin genes, there exist rigid secondary structures that show the slowing down of evolutionary rates of both synonymous and amino acid substitutions in the primate line.
Adaptive protein evolution at the Adh locus in Drosophila
- BiologyNature
- 1991
A simple statistical test of the neutral protein evolution hypothesis is proposed based on a comparison of the number of amino-acid replacement substitutions to synonymous substitutions in the coding region of a locus, finding that there are more fixed replacement differences between species than expected.
A simple method for estimating evolutionary rates of base substitutions through comparative studies of nucleotide sequences
- BiologyJournal of Molecular Evolution
- 2005
Some examples were worked out using reported globin sequences to show that synonymous substitutions occur at much higher rates than amino acid-altering substitutions in evolution.