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Gene expression divergence is coupled to evolution of DNA structure in coding regions
1School of Information Science and Technology, Sun Yat-Sen University, Guangzhou, China. zhimdai@gmail.com
Plos Computational Biology
|November 30, 2011
Summary
DNA structural evolution, not just sequence changes, drives gene expression differences between species. This impacts gene regulation and biological functions, revealing new cis-regulatory mechanisms.
Area of Science:
- Genomics
- Molecular Biology
- Evolutionary Biology
Background:
- Gene expression divergence between species is primarily attributed to cis-acting sequence changes.
- However, yeast species show a lack of correlation between sequence evolution and gene expression divergence, suggesting other cis-acting factors are involved.
Purpose of the Study:
- To investigate the role of DNA three-dimensional structural evolution as a cis-acting factor in gene expression divergence.
- To understand how DNA structure influences gene regulation and biological function.
Main Methods:
- Comparative analysis of DNA structure and gene expression patterns in yeast and Drosophila species.
- Investigating the association between DNA structure, chromatin modifier binding, and RNA polymerase II occupancy.
Main Results:
- A significant correlation was found between the evolution of DNA structure in coding regions and gene expression divergence in yeast and Drosophila.
- DNA structure variations are linked to the binding of chromatin remodelers and histone modifiers, affecting RNA polymerase II occupancy.
- Genes with similar DNA structures were found to participate in the same biological processes and functions.
Conclusions:
- DNA three-dimensional structure evolution is a significant cis-acting mechanism driving gene expression divergence.
- These structural changes influence gene regulation through epigenetic modifications and chromatin accessibility.
- Understanding DNA structural evolution provides new insights into the mechanisms of gene regulation and species evolution.
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