Understanding Alignment Accuracy in Noncoding DNA
Author Information
Author(s): Pollard Daniel A, Moses Alan M, Iyer Venky N, Eisen Michael B
Primary Institution: University of California, Berkeley
Hypothesis
How does multiple alignment accuracy vary across sequence types and its impact on molecular evolutionary inferences?
Conclusion
Variation in alignment accuracy can lead to errors in molecular evolutionary inferences that could be misconstrued as biological variation.
Supporting Evidence
- The accuracy of multiple alignments is primarily determined by the pairwise divergence distance of the two most diverged species.
- Conserved transcription factor binding sites align better than surrounding noncoding DNA.
- Divergence estimates from multiple alignments tend to be overestimated at short divergence distances.
- Overall alignment accuracy varies greatly across branches in a tree.
Takeaway
This study shows that when scientists compare DNA sequences, mistakes can happen in how they align them, which can lead to wrong conclusions about evolution.
Methodology
The study developed a simulation platform called CisEvolver to assess alignment accuracy and its effects on evolutionary inferences.
Potential Biases
The accuracy of alignments varies across branches in a tree, potentially leading to biased evolutionary inferences.
Limitations
The study's findings may not apply to more complex evolutionary scenarios or to real datasets with more species.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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