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Prokaryotes are small unicellular organisms that include the domains—Archaea and Bacteria. Bacteria include many common organisms, such as Salmonella and E. coli, while the Archaea include extremophiles that live in harsh environments, such as volcanic springs.
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The present-day mitochondrial and chloroplast genomes have retained some of the characteristics of their ancestral prokaryotes and also have acquired new attributes during their evolution within eukaryotic cells. Like prokaryotic genomes, mitochondrial and chloroplast genomes neither bind with histone-like proteins nor show complex packaging into chromosome-like structures, as observed in eukaryotes. Unlike mitotic cell divisions observed in eukaryotic cells, mitochondria and chloroplasts...
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Prokaryote pangenomes are dynamic entities.

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Prokaryote pangenomes are dynamic and constantly changing due to environmental factors. Future models must include eco-evolutionary dynamics to accurately represent these complex gene pool shifts.

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Area of Science:

  • Microbiology
  • Evolutionary Biology
  • Genomics

Background:

  • Prokaryote pangenomes are significantly shaped by environmental influences and gene transfer events.
  • Understanding the eco-evolutionary dynamics that shape pangenomes is crucial as pangenome analysis advances.

Purpose of the Study:

  • To review and assess current models of prokaryote pangenome evolution.
  • To emphasize the dynamic nature of pangenomes and the impact of environment-pangenome interactions.
  • To highlight the need for updated classifications and nomenclature for core and accessory genes.

Main Methods:

  • Review of existing literature on pangenome evolution models.
  • Analysis of the interplay between environmental factors and gene gain/loss dynamics.
  • Discussion of current and proposed gene classifications.

Main Results:

  • Pangenomes are not static but are in constant flux, influenced by bidirectional interactions with their environment.
  • Existing models may not fully capture the complexity of eco-evolutionary forces acting on pangenomes.
  • Current classifications of core and accessory genes require ongoing evaluation.

Conclusions:

  • Future models of prokaryote pangenome evolution must integrate eco-evolutionary dynamics.
  • A dynamic view is essential for accurately describing the changeable nature of pangenomes.
  • Continuous re-evaluation of nomenclature is necessary in this rapidly evolving field.