The Life-Cycle of Operons
Author Information
Author(s): Price Morgan N, Arkin Adam P, Alm Eric J
Primary Institution: Lawrence Berkeley National Laboratory
Hypothesis
How and why operon structures vary in prokaryotic genomes?
Conclusion
Operon evolution may be driven by selection on gene expression patterns, with both creation and destruction of operons leading to significant changes in gene expression.
Supporting Evidence
- Operon creation and destruction lead to large changes in gene expression patterns.
- Some operons have undergone accelerated evolution with multiple new genes added in a short time.
- Highly expressed operons tend to have widely spaced genes due to regulatory fine-tuning.
Takeaway
Bacteria often group genes together in operons, which can change over time. This study shows that these changes can help bacteria adapt to their environments.
Methodology
The study compared gene order between Escherichia coli K12 and its relatives to identify newly formed and destroyed operons.
Potential Biases
Potential biases in operon predictions due to reliance on gene proximity and conservation.
Limitations
The predictions of new operons may be less reliable due to their lack of conservation across many genomes.
Statistical Information
P-Value
p = 0.03
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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