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The Tn21 subgroup of bacterial transposable elements.
J Grinsted1, F de la Cruz, R Schmitt
1Department of Microbiology, University of Bristol, Medical School, University Walk, U.K.
Plasmid
|November 1, 1990
Summary
The Tn3 family, a successful bacterial mobile DNA group, includes the Tn21 subgroup. These elements drive antibiotic resistance variation in gram-negative bacteria.
Area of Science:
- Microbiology
- Genetics
- Molecular Biology
Background:
- The Tn3 family represents a highly successful and widespread group of bacterial transposable elements.
- The Tn21 subgroup, within the Tn3 family, is notable for its genetic diversity and significant role in antibiotic resistance.
Purpose of the Study:
- To review the structure and transposition mechanisms of Tn3-like elements.
- To explore the acquisition of accessory genes and evolutionary pathways of these elements.
Main Methods:
- Literature review and synthesis of existing research on Tn3 family and Tn21 subgroup.
- Comparative analysis of genetic structures and transposition mechanisms.
- Analysis of gene acquisition strategies and evolutionary trends.
Main Results:
- Tn3 elements are widely distributed across bacterial species.
- The Tn21 subgroup exhibits significant variation and is a primary driver of multidrug resistance in gram-negative bacteria.
- Key aspects of Tn3 element structure, transposition, gene acquisition, and evolution are detailed.
Conclusions:
- The Tn3 family, particularly the Tn21 subgroup, plays a critical role in bacterial evolution and the spread of antibiotic resistance.
- Understanding these mobile genetic elements is crucial for combating antimicrobial resistance.