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Published on: March 16, 2014
Pumilio genes from the Platyhelminthes
Uriel Koziol1, Monica Marín, Estela Castillo
1Sección Bioquímica, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo, Uruguay.
Development Genes and Evolution
|January 9, 2008
Summary
Pumilio proteins regulate stem cell proliferation. This study found gene duplications in parasitic flatworms (Platyhelminthes), suggesting an ancient role in their evolution and development.
Area of Science:
- Molecular Biology
- Evolutionary Biology
- Genomics
Background:
- Pumilio proteins are crucial for stem cell proliferation via post-transcriptional regulation.
- Their evolutionary history across diverse phyla remains largely unexplored.
Purpose of the Study:
- To investigate the evolutionary history of pumilio homology domain (PUM-HD) genes in Platyhelminthes.
- To identify gene duplication events and their implications for parasitic flatworm evolution.
Main Methods:
- Bioinformatic analysis of PUM-HD sequences across various Platyhelminthes species (Cestoda, Trematoda, Tricladida).
- Phylogenetic analysis to construct evolutionary relationships between PUM-HD sequences.
Main Results:
- Identified one PUM-HD sequence in triclad species and two in parasitic species.
- Discovered two distinct clades: PlatyPum1 (all species) and PlatyPum2 (neodermatan parasites).
- Evidence for a pumilio gene duplication event predating cestode and trematode divergence.
Conclusions:
- The findings suggest a significant duplication event in pumilio genes occurred early in flatworm evolution.
- The PlatyPum2 clade indicates a specific expansion in parasitic lineages.
- This is the first comparative PUM-HD analysis in Platyhelminthes and Lophotrochozoa.
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