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Compositional properties of coding sequences and mammalian phylogeny

D Mouchiroud1, G Bernardi

  • 1Laboratoire de Biométrie, Génétique et Biologie des Populations, U.R.A. 243, Université Claude Bernard, Villeurbanne, France.

Journal of Molecular Evolution
|August 1, 1993
PubMed
Summary

Large DNA fragment composition reveals evolutionary relationships in mammalian genomes. Analysis of coding sequences and gene bases supports distinct compositional patterns for mammals and Myomorpha.

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Area of Science:

  • Genomics
  • Bioinformatics
  • Evolutionary Biology

Background:

  • Mammalian genomes exhibit compositional patterns related to isochores.
  • DNA composition analysis offers insights into phylogenetic relationships.

Purpose of the Study:

  • To investigate compositional patterns in mammalian genomes.
  • To determine if these patterns provide phylogenetic insights.
  • To identify distinct compositional patterns within mammalian subgroups.

Main Methods:

  • Analyzing compositional patterns of large DNA fragments.
  • Examining compositional patterns of coding sequences and codon positions.
  • Comparing base compositions of codon positions from homologous genes across species.

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Main Results:

  • Results support a general compositional pattern for mammalian genomes.
  • A distinct compositional pattern was identified for Myomorpha.
  • The study confirmed the reflection of isochore patterns in DNA composition.

Conclusions:

  • Mammalian genome composition follows general and specific patterns.
  • Isochore patterns are reflected in DNA fragment and coding sequence composition.
  • Further research is needed to test special compositional patterns in other species.