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Updated: Aug 1, 2026
08:57
Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
Published on: August 14, 2018
Anomalous phylogenies based on bacterial catalase gene sequences
Journal of Molecular Evolution
|April 1, 1996
Summary
Prokaryotic catalase gene phylogenies do not align with ribosomal DNA phylogenies. This suggests repeated horizontal gene transfer of catalase sequences from eukaryotes to prokaryotes.
Area of Science:
- Biochemistry
- Molecular Biology
- Evolutionary Biology
Background:
- Catalases are essential enzymes found across all domains of life.
- Phylogenetic analysis is crucial for understanding evolutionary relationships.
- Previous studies have established phylogenetic trees based on ribosomal DNA (rDNA) and other genetic markers.
Purpose of the Study:
- To investigate the evolutionary history of the catalase gene.
- To compare phylogenetic trees derived from prokaryotic catalase sequences with those from rDNA and other established criteria.
- To determine the origin and transmission patterns of the catalase gene.
Main Methods:
- Phylogenetic analysis of nine prokaryotic catalase gene sequences.
- Comparison of catalase-based phylogenies with rDNA-based phylogenies and other known evolutionary criteria.
- Analysis of the phylogenetic relationship of eukaryotic catalase sequences.
Main Results:
- Phylogenetic analyses based on prokaryotic catalase sequences showed no correlation with phylogenies derived from rDNA or other established criteria.
- Eukaryotic catalase sequences exhibited a monophyletic relationship.
- The observed discrepancies suggest a complex evolutionary history for the catalase gene.
Conclusions:
- The catalase gene sequence likely originated in eukaryotes.
- Repeated horizontal gene transfer events from eukaryotes to prokaryotes are indicated.
- The evolutionary trajectory of the catalase gene differs significantly from that of the organismal phylogeny.
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