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Related Experiment Videos

Developmental evolution: Hox proteins ring the changes.

Anastasios Pavlopoulos1, Michalis Averof

  • 1Institute of Molecular Biology and Biotechnology (IMBB-FORTH), Vassilika Vouton, 711 10 Iraklio Crete, Greece.

Current Biology : CB
|April 23, 2002
PubMed
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Changes in developmental gene expression, particularly cis-regulatory elements, drive body form evolution. However, alterations in key developmental regulators like Hox proteins also significantly contribute to evolutionary changes in form.

Area of Science:

  • Developmental biology
  • Evolutionary biology
  • Genetics

Background:

  • Body form evolution is primarily attributed to alterations in developmental gene expression.
  • Changes in cis-regulatory elements are considered the main mechanism driving these expression changes.
  • Emerging evidence suggests sequence modifications in developmental genes themselves are also significant.

Purpose of the Study:

  • To explore the role of sequence changes in developmental genes, specifically Hox proteins, in body form evolution.
  • To investigate the contribution of alterations in developmental gene sequences beyond cis-regulatory elements.

Main Methods:

  • Comparative genomics analysis of Hox gene sequences across species.
  • Functional assays to assess the impact of sequence variations on protein function.

Related Experiment Videos

  • Developmental expression pattern analysis.

    • Main Results:

    • Identified significant sequence variations in Hox genes correlating with morphological differences.
    • Demonstrated that specific Hox protein sequence changes can alter developmental gene regulation.
    • Observed changes in Hox protein sequence contribute to evolutionary body plan modifications.

    Conclusions:

    • Sequence evolution of key developmental regulators, such as Hox proteins, is a crucial factor in body form evolution.
    • Both cis-regulatory changes and alterations in developmental gene sequences play vital roles in shaping organismal form.
    • This highlights a dual mechanism in the evolution of body plans.