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Active conservation of noncoding sequences revealed by three-way species comparisons
I Dubchak1, M Brudno, G G Loots
1Center for Bioinformatics and Computational Genomics, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Genome Research
|September 14, 2000
Summary
Comparing human and mouse genomes helps find gene regulatory elements. Many conserved noncoding sequences exist, but their functional importance versus lack of divergence time remains unclear.
Area of Science:
- Genomics
- Comparative Genomics
- Evolutionary Biology
Background:
- Human and mouse genomic sequence comparisons are crucial for identifying evolutionarily conserved gene regulatory elements.
- Large-scale studies have identified numerous conserved noncoding sequences between humans and mice.
Purpose of the Study:
- To investigate whether conserved noncoding sequences are primarily conserved due to functional constraints or a lack of evolutionary divergence time.
- To address the functional significance of identified conserved noncoding sequences.
Main Methods:
- Comparative genomic analysis of human and mouse DNA sequences.
- Identification of conserved noncoding sequences (CNSs).
Main Results:
- Numerous CNSs have been discovered through human-mouse DNA comparisons.
- Only a small fraction of these CNSs have undergone functional investigation.
Conclusions:
- The functional relevance of the majority of conserved noncoding sequences requires further investigation.
- Distinguishing functional constraint from lack of divergence time is key to understanding noncoding sequence evolution.