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Related Concept Videos

Multi-species Conserved Sequences02:51

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Updated: Oct 29, 2025

An Integrated Approach for Microprotein Identification and Sequence Analysis
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Evolutionary conservation in noncoding genomic regions.

Nicole A Leypold1, Michael R Speicher2

  • 1Institute of Human Genetics, Diagnostic and Research Center for Molecular Biomedicine, Medical University of Graz, 8010 Graz, Austria.

Trends in Genetics : TIG
|July 9, 2021
PubMed
Summary
This summary is machine-generated.

Humans share more genomic similarities with other species than expected. Conserved noncoding elements (CNEs) represent a significant portion of the human genome, offering insights into evolution and disease.

Keywords:
comparative genomicsconservationevolutionmultispecies analysisnoncodingwhole-genome sequencing

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Area of Science:

  • Genomics
  • Evolutionary Biology
  • Bioinformatics

Background:

  • Current estimates suggest ~5% of the human genome is functionally constrained.
  • Protein-coding genes occupy ~1.5%, leaving a substantial portion for conserved noncoding elements (CNEs).
  • Approximately 3.5% of the human genome may consist of CNEs conserved across species over millions of years.

Purpose of the Study:

  • To discuss the phenomenon of noncoding conservation.
  • To explore the significance of CNEs in phenotype variation and disease.
  • To highlight the necessity of interpreting variations in CNEs as whole-genome sequencing becomes standard.

Main Methods:

  • Discussion of noncoding conservation across four dimensions: sequence, regulatory conservation, spatiotemporal expression, and structure.
  • Review of existing literature on conserved noncoding elements.
  • Analysis of the functional and mechanistic roles of CNEs.

Main Results:

  • A significant portion of the human genome comprises functionally constrained noncoding elements.
  • Conserved noncoding elements (CNEs) are preserved across species due to evolutionary pressures.
  • CNEs play a crucial role in phenotype variation and can be associated with diseases.

Conclusions:

  • Genomic commonalities between humans and other species may be underestimated.
  • Understanding CNEs is essential for interpreting genetic variations from whole-genome sequencing.
  • Conserved noncoding elements have significant implications for human health and disease research.