Adaptive Evolution of Hox Gene Homeodomains
Author Information
Author(s): Vincent J. Lynch, Jutta J. Roth, Günter P. Wagner
Primary Institution: Yale University
Hypothesis
Did positive selection act on Hox gene homeodomains after cluster duplications?
Conclusion
Positive selection acted on the homeodomain of Hox genes immediately after cluster duplications, influencing protein-protein interactions.
Supporting Evidence
- The homeodomain of Hox genes was under positive Darwinian selection after cluster duplications.
- Amino acid substitutions at specific sites were identified as targets of positive selection.
- The study compiled a database of Hox genes with extensive taxon sampling.
Takeaway
The study found that after certain genes duplicated, they changed in ways that helped them work better with other proteins, which is important for how animals develop.
Methodology
The study used dN/dS ratio tests, amino acid conservation patterns, and relative rate ratio tests to analyze Hox gene homeodomains.
Limitations
The study may not account for all factors influencing Hox gene evolution due to the complexity of gene interactions.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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