Related Experiment Videos
Mobile DNA in obligate intracellular bacteria
Seth R Bordenstein1, William S Reznikoff
1Josephine Bay Paul Center for Comparative Molecular Biology and Evolution, The Marine Biological Laboratory, 7 MBL Street, Woods Hole, Massachusetts 02543, USA. sbordenstein@mbl.edu
Nature Reviews. Microbiology
|September 3, 2005
Summary
Obligate intracellular bacteria genomes are not as stable as previously thought. Mobile DNA and genetic exchange are more prevalent, challenging reductive evolution theories.
Area of Science:
- Microbiology
- Genomics
- Evolutionary Biology
Background:
- Obligate intracellular bacteria possess small genomes, often assumed to be stable due to reductive evolution.
- Previous understanding suggested limited mobile DNA and genetic fluidity in these bacteria, impacting diversification.
Purpose of the Study:
- To challenge the long-held assumption of genome stability in obligate intracellular bacteria.
- To investigate the role of mobile genetic elements in the evolution of these bacteria.
Main Methods:
- Comparative genomics of obligate intracellular bacterial species.
- Analysis of mobile genetic elements and their association with bacterial genomes.
- Examination of gene synteny and genome fluidity.
Main Results:
- Complete genome sequences reveal a more dynamic genetic landscape than previously assumed.
- Evidence suggests mobile DNA and genetic exchange are more common in obligate intracellular bacteria.
- Gene synteny is not as universally conserved as once believed.
Conclusions:
- The notion of obligate intracellular bacterial genomes being impervious to mobile DNA is an oversimplification.
- Reductive evolution does not solely dictate the genome stability of these bacteria.
- A more complex evolutionary picture involving genetic fluidity is emerging for obligate intracellular bacteria.