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Conserved Critical Evolutionary Gene Structures in Orthologs.

Miguel A Fuertes1, José R Rodrigo2, Carlos Alonso3

  • 1Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Universidad Autónoma de Madrid, c/Nicolás Cabrera 1, 28049, Madrid, Spain. mafuertes@cbm.csic.es.

Journal of Molecular Evolution
|March 1, 2019
PubMed
Summary

Researchers found a novel, highly conserved gene structure in orthologs, suggesting a new mechanism for coordinated evolution across species. This emergent structure is maintained during speciation, offering insights into gene function and evolution.

Keywords:
Gene structureHuman–mouse orthologsMolecular evolutionTriplet-composon

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Area of Science:

  • Genomics
  • Evolutionary Biology
  • Bioinformatics

Background:

  • Gene structure is influenced by evolutionary history and functional constraints.
  • The coordinated evolution of orthologs during speciation suggests underlying conserved mechanisms.
  • The existence of a conserved, emergent gene structure in orthologs has been hypothesized.

Purpose of the Study:

  • To investigate the presence of conserved hypothetical structures within ortholog gene sequences.
  • To determine if these conserved structures are maintained during speciation events.
  • To explore the concept of critical gene structure in evolutionary genomics.

Main Methods:

  • Comparative analysis of ortholog gene sequences across a broad range of species.
  • Identification and characterization of conserved compositional structures.
  • Correlation analysis between nucleotide sequence identity and conserved compositional structure identity during speciation.

Main Results:

  • Most studied orthologs exhibit previously unobserved, highly conserved compositional structures.
  • Conserved compositional structures are maintained across a wide range of species.
  • While nucleotide sequence identity correlates with composon sequence identity, the number of conserved emergent structures does not correlate with percent identity during speciation.

Conclusions:

  • Evidence supports the hypothesis of an emergent, highly conserved gene structure in orthologs.
  • This conserved structure plays a role in the coordinated evolution of genes during speciation.
  • The findings contribute to understanding gene function, evolution, and the concept of critical gene structure.