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Related Experiment Videos

Mobile group II introns.

Alan M Lambowitz1, Steven Zimmerly

  • 1Institute for Cellular and Molecular Biology, Department of Chemistry and Biochemistry, Section of Molecular Genetics and Microbiology, University of Texas at Austin, Texas 78712, USA. lambowitz@mail.utexas.edu

Annual Review of Genetics
|December 1, 2004
PubMed
Summary
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Mobile group II introns are catalytic RNAs that move within genomes. They splice into DNA targets and use reverse transcription for insertion, then self-excise to minimize host damage.

Area of Science:

  • Molecular Biology
  • Genetics
  • RNA Biology

Background:

  • Mobile group II introns are retrotransposable elements found in bacteria and organelles.
  • They possess unique mobility mechanisms involving RNA-mediated DNA insertion and reverse transcription.

Purpose of the Study:

  • To review the experimental basis of group II intron mobility mechanisms.
  • To discuss evolutionary relationships and recent advancements in gene-targeting applications.

Main Methods:

  • Review of genetic observations in yeast mitochondria.
  • Analysis of molecular mechanisms in bacterial and organellar group II introns.
  • Examination of bacterial genome sequencing data.

Main Results:

Related Experiment Videos

  • Detailed understanding of group II intron mobility, including reverse splicing into DNA targets and protein-assisted splicing.
  • Established links between intron mobility and DNA replication.
  • Insights into intron evolution and relationships with other mobile elements.

Conclusions:

  • Mobile group II introns have sophisticated mechanisms for propagation and host integration.
  • These introns are evolutionarily related to eukaryotic spliceosomal introns and non-LTR retrotransposons.
  • Mobile group II introns have been engineered into programmable gene-targeting vectors called "targetrons".