Cited by 811DNA Repair MechanismsT-cell and B-cell ImmunologyGenomics and Chromatin Dynamics

Transposition mediated by RAG1 and RAG2 and its implications for the evolution of the immune system

Agrawal, Alka, Eastman, Quinn M., Schatz, David G.·1998·Nature

Abstract

Immunoglobulin and T-cell-receptor genes are assembled from component gene segments in developing lymphocytes by a site-specific recombination reaction, V(D)J recombination. The proteins encoded by the recombination-activating genes, RAG1 and RAG2, are essential in this reaction, mediating sequence-specific DNA recognition of well-defined recombination signals and DNA cleavage next to these signals. Here we show that RAG1 and RAG2 together form a transposase capable of excising a piece of DNA containing recombination signals from a donor site and inserting it into a target DNA molecule. The products formed contain a short duplication of target DNA immediately flanking the transposed fragment, a structure like that created by retroviral integration and all known transposition reactions. The results support the theory that RAG1 and RAG2 were once components of a transposable element, and that the split nature of immunoglobulin and T-cell-receptor genes derives from germline insertion of this element into an ancestral receptor gene soon after the evolutionary divergence of jawed and jawless vertebrates.

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Crossref · 10.1038/29457

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Authors
Agrawal, A., Eastman, Q. M., & Schatz, D. G.
Affiliations
  • Yale University (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
Schatz, David G.
Venue
Nature
Published
1998-08
Volume
394
Issue
6695
Pages
744-751
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1513093379
Cited by
811
References
44
Citations by year
2026: 6 · 2025: 10 · 2024: 19 · 2023: 9 · 2022: 12 · 2021: 13 · 2020: 27 · 2019: 18 · 2018: 12 · 2017: 11 · 2016: 17 · 2015: 24 · 2014: 18 · 2013: 16 · 2012: 37
FWCI
20.82
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
RAG1, RAG2, V(D)J recombination, transposition, transposase, immunoglobulin genes, T cell receptor genes, transposable elements, immune system evolution, jawless fishes
MeSH terms
Amino Acid Sequence, Animals, Antibodies, B-Lymphocytes, Binding Sites, Catalysis, Cell Line, DNA, DNA Transposable Elements, DNA-Binding Proteins, DNA, Circular, Drug Resistance, Microbial, High Mobility Group Proteins, Immune System, Molecular Sequence Data, Receptors, Antigen, T-Cell, Recombination, Genetic, Vertebrates, Restriction Mapping, Gene Rearrangement, B-Lymphocyte, Gene Rearrangement, T-Lymphocyte, Homeodomain Proteins, Evolution, Molecular, Transposases, Mice

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