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Related Experiment Videos

Compositional properties of homologous coding sequences from plants

Carels1, Hatey, Jabbari

  • 1Laboratoire de Genetique Moleculaire, Institut Jacques Monod, 2 Place Jussieu, 75005 Paris, France.

Journal of Molecular Evolution
|February 6, 1998
PubMed
Summary

This study reveals distinct compositional patterns in plant nuclear coding sequences, highlighting evolutionary transitions and gene structure correlations in dicots and Gramineae. These findings offer insights into plant gene evolution.

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Editorial

Gene·1999

Area of Science:

  • Plant Molecular Biology
  • Genomics
  • Evolutionary Biology

Background:

  • Previous studies noted compositional differences between dicot and Gramineae plant groups.
  • Understanding gene compositional evolution is crucial for plant genomics.

Purpose of the Study:

  • To investigate compositional distributions and correlations in nuclear coding sequences of dicots and Gramineae.
  • To analyze compositional transitions during Gramineae emergence and exon-intron correlations.
  • To characterize compositional profiles of homologous angiosperm genes.

Main Methods:

  • Analysis of nuclear coding sequences (three codon positions) from six dicots and four Gramineae.
  • Examination of compositional correlations between homologous genes across plant groups.

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  • Assessment of compositional relationships between exons and introns.

    • Main Results:

    • Significant differences in compositional distributions were observed between dicots and Gramineae.
    • Homologous genes showed strong compositional correlations, with slopes near unity.
    • Gramineae exhibited strong exon-intron compositional correlations, unlike dicots.
    • Angiosperm homologous genes displayed characteristic GC-rich exon and GC-poor intron profiles.

    Conclusions:

    • Plant gene composition is shaped by evolutionary history, with distinct modes in dicots and Gramineae.
    • Compositional patterns reflect evolutionary transitions and gene structure, providing insights into angiosperm evolution.