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Related Experiment Videos

A possible link between molecular evolution and tissue evolution demonstrated by tissue specific genes

T Miyata1, K Kuma, N Iwabe

  • 1Department of Biophysics, Faculty of Science, Kyoto University, Japan.

Idengaku Zasshi
|October 1, 1994
PubMed
Summary

Molecular evolution rates vary by tissue, with brain genes evolving slower than immune genes. This suggests functional constraints link molecular and tissue evolution, particularly in early chordates.

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Area of Science:

  • Evolutionary biology
  • Molecular evolution
  • Developmental biology

Background:

  • Gene evolutionary rates differ significantly across tissues.
  • Tissue-specific gene expression implies tissue-level functional constraints.
  • Understanding the link between molecular and tissue evolution is crucial.

Purpose of the Study:

  • To investigate the relationship between molecular evolution and tissue evolution.
  • To explore the impact of functional constraints on evolutionary rates.
  • To analyze gene duplication and amino acid substitution patterns in chordate evolution.

Main Methods:

  • Comparative analysis of evolutionary rates for tissue-specific genes.
  • Molecular phylogenetic analysis of tissue-specific isoforms.

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  • Examination of gene duplication and amino acid substitution rates.

    • Main Results:

    • Evolutionary rates of tissue-specific genes vary widely, with brain genes evolving slower than immune genes.
    • Functional constraints at the tissue level influence molecular evolutionary rates.
    • Frequent gene duplications and rapid amino acid substitutions observed in early chordate evolution.

    Conclusions:

    • A strong correlation exists between molecular evolution and tissue evolution.
    • Functional constraints provide a framework for understanding this correlation.
    • The findings offer insights into the evolutionary processes shaping tissues and organs.