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Demonstration of the Sequence Alignment to Predict Across Species Susceptibility Tool for Rapid Assessment of Protein Conservation
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Conserved noncoding sequences conserve biological networks and influence genome evolution.
Jianbo Xie1,2, Kecheng Qian1,2, Jingna Si1,2
1National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing, 100083, P. R. China.
Heredity
|February 4, 2018
Summary
Conserved noncoding sequences (CNSs) in poplar genomes are vital for gene regulation and evolution. Most CNSs are conserved under purifying selection, with some showing adaptive evolution, impacting biological networks and adaptation.
Area of Science:
- Plant genomics
- Molecular evolution
- Bioinformatics
Background:
- Conserved noncoding sequences (CNSs) are identified in plant genomes, but their functional importance and evolutionary pressures are not fully understood.
- Understanding CNSs is crucial for deciphering gene regulation, genome evolution, and adaptation in plants.
Purpose of the Study:
- To investigate the functional importance and evolutionary dynamics of CNSs in the model tree Populus trichocarpa.
- To analyze DNA methylation patterns, gene expression, and evolutionary constraints on CNSs.
Main Methods:
- Comparative genomics
- DNA methylome analysis
- Microarray expression analysis
- Functional annotation
- Population genomics
Main Results:
- CNSs exhibit lower DNA methylation, particularly in 5'-upstream regions, compared to other genomic sites.
- CNSs are enriched near genes involved in transcription, binding functions, and are associated with syntenic and whole-genome duplication events.
- A positive correlation exists between CNS number and protein interactions, suggesting roles in biological network evolution.
- Most CNSs are under strong purifying selection, with a subset showing evidence of adaptive evolution, driving subfunctionalization of duplicated genes.
Conclusions:
- CNSs play a significant role in plant genome evolution and the maintenance of biological networks.
- The study provides insights into the evolutionary mechanisms, including duplication-degeneration-complementation, shaping CNSs and gene function.
- Findings lay the groundwork for future research on CNSs in local adaptation and transcriptional regulation.
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