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Frequent gene fissions associated with human pathogenic bacteria
Ioanna Karamichali1, V Lila Koumandou1, Amalia D Karagouni2
1Biomedical Research Foundation, Academy of Athens, Soranou Efesiou 4, 115 27 Athens, Greece.
Genomics
|February 18, 2014
Summary
Gene fissions unexpectedly dominate gene fusions in human bacterial pathogens, with many events occurring multiple times. This finding is linked to their pathogenic lifestyle and recent evolution.
Area of Science:
- Evolutionary biology
- Genomics
- Microbiology
Background:
- Gene fusion and fission events are crucial for understanding genome evolution and predicting protein interactions.
- Traditionally, gene fusions are observed to be more common than gene fissions and occur as singular evolutionary events.
Purpose of the Study:
- To investigate the prevalence and evolutionary patterns of gene fusion and fission events in 104 human bacterial pathogens.
- To compare these events in pathogens versus their non-pathogenic relatives to understand the influence of lifestyle.
Main Methods:
- Analysis of gene fusion and fission events across the genomes of 104 human bacterial pathogens.
- Identification of 141 protein pairs involved in these events.
- Comparative genomics analysis with closely related non-pathogenic bacterial species.
Main Results:
- Gene fissions were found to be more prevalent than gene fusions in the studied human bacterial pathogens.
- A significant proportion (23%) of identified gene fusion and fission events occurred multiple times independently.
- The observed patterns of gene fusion and fission are strongly associated with the recent evolutionary history of these pathogens.
Conclusions:
- The predominance of gene fissions over fusions and the recurrence of these events in human bacterial pathogens are linked to their pathogenic lifestyle.
- These findings highlight the dynamic nature of bacterial genomes during adaptation to pathogenicity.
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