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Related Experiment Videos

AID hits the jackpot when missing the target.

Amy L Kenter1, Satyendra Kumar1, Robert Wuerffel1

  • 1Department of Microbiology and Immunology, University of Illinois College of Medicine, Chicago, IL, USA.

Current Opinion in Immunology
|February 5, 2016
PubMed
Summary

Activation induced deaminase (AID) targets DNA for B cell mutation, but its specificity remains unclear. Research reveals AID

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Area of Science:

  • Immunology
  • Molecular Biology
  • Genetics

Background:

  • Activation induced deaminase (AID) is crucial for B cell antibody diversification.
  • AID targets immunoglobulin (Ig) genes for class switch recombination and somatic hypermutation.
  • AID can also target non-Ig DNA, contributing to DNA damage and lymphomagenesis.

Purpose of the Study:

  • To elucidate the mechanism governing AID targeting to DNA substrates.
  • To understand the relationship between AID targeting and transcription processes.
  • To reveal the rules dictating AID's specificity.

Main Methods:

  • Review and integration of existing research on AID targeting and DNA damage.
  • Analysis of the link between AID activity and transcriptional regulation.

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  • Synthesis of data to propose a model for AID specificity.

    • Main Results:

    • AID targeting to DNA substrates is intrinsically linked to transcription.
    • Specific transcription processes dictate the rules governing AID's attack specificity.
    • A surprising connection exists between AID function and global gene expression regulation.

    Conclusions:

    • Understanding AID targeting mechanisms is key to preventing AID-associated DNA damage.
    • The specificity of AID attack is governed by transcription-coupled processes.
    • AID's role extends beyond Ig loci, impacting global gene regulation.