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sine oculis in basal Metazoa
Ilona G Bebenek1, Ruth D Gates, Joshua Morris
1Department of Organismic Biology Ecology and Evolution, University of California Los Angeles, 621 Charles E. Young Drive South, Los Angeles, CA 90095-1606, USA.
Development Genes and Evolution
|June 29, 2004
Summary
The Six1/2/sine oculis (so) gene, crucial for development, is highly conserved across diverse animal groups, including sponges and jellyfish. This finding highlights its ancient evolutionary role in metazoan development.
Area of Science:
- Developmental Biology
- Evolutionary Biology
- Genetics
Background:
- The Six-gene family, including Six1/2/sine oculis (so), plays a vital role in animal development.
- Understanding the evolutionary conservation of developmental genes provides insights into early animal evolution.
Purpose of the Study:
- To investigate the presence and conservation of Six1/2/sine oculis (so) homologs in basal Metazoa.
- To explore the evolutionary history of the so gene across diverse animal phyla.
Main Methods:
- Sequence recovery of so homologs from various basal metazoans using PCR and 3' RACE.
- Phylogenetic analysis using parsimony based on nucleic and amino acid sequences.
- Preliminary expression analysis of so homologs in Aurelia aurita.
Main Results:
- so homologs were identified in a wide range of basal Metazoa, including Porifera, Cnidaria, Ctenophora, Platyhelminthes, Echiura, and Mollusca.
- Phylogenetic analyses confirmed the conserved nature of so across these diverse taxa.
- so transcripts were detected in specific structures (manubrium, rhopalia) of Aurelia aurita during development.
Conclusions:
- The so gene is a highly conserved developmental gene throughout the animal kingdom.
- This conservation suggests a fundamental role for so in metazoan development since early evolutionary stages.
- Further research into so gene function across different phyla will illuminate its role in evolutionary developmental biology.