Cited by 225DNA Repair MechanismsT-cell and B-cell ImmunologyGenomics and Chromatin Dynamics

The Homeodomain Region of Rag-1 Reveals the Parallel Mechanisms of Bacterial and V(D)J Recombination

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Spanopoulou, Eugenia, Zaitseva, Florina, Wang, Fu-Hou, Santagata, Sandro, Baltimore, David, Panayotou, George·1996·Cell

Abstract

The V(D)J recombinase subunits Rag-1 and Rag-2 mediate assembly of antigen receptor gene segments. We studied the mechanisms of DNA recognition by Rag-1/Rag-2 using surface plasmon resonance. The critical step for signal recognition is binding of Rag-1 to the nonamer. This is achieved by a region of Rag-1 homologous to the DNA-binding domain of the Hin family of bacterial invertases and to homeodomain proteins. Strikingly, the Hin homeodomain can functionally substitute for the Rag-1 homologous region. Rag-1 also interacts with the heptamer but with low affinity. Rag-2 shows no direct binding to DNA. Once the Rag-1/Rag-2 complex is engaged on the DNA, subsequent cleavage is directed by the heptamer sequence. This order of events remarkably parallels mechanisms that mediate transposition in bacteria and nematodes.

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Crossref · 10.1016/s0092-8674(00)81344-6

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Authors
Spanopoulou, E., Zaitseva, F., Wang, F.-H., Santagata, S., Baltimore, D., & Panayotou, G.
Affiliations
  • Icahn School of Medicine at Mount Sinai (US)
  • Massachusetts Institute of Technology (US)
  • Ludwig Cancer Research (GB)
Corresponding author
Spanopoulou, Eugenia
Venue
Cell
Publisher
Elsevier BV
Published
1996-10
Volume
87
Issue
2
Pages
263-276
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2067022774
Cited by
225
References
62
Citations by year
2024: 3 · 2023: 3 · 2022: 2 · 2021: 1 · 2020: 3 · 2019: 2 · 2018: 1 · 2017: 2 · 2016: 2 · 2015: 5 · 2014: 4 · 2013: 4 · 2012: 4
FWCI
8.83
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • CaltechAUTHORS (California Institute of Technology) (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, homeodomain, DNA-binding domain, heptamer, transposon transposition, bacterial recombination, surface plasmon resonance
MeSH terms
Amino Acid Sequence, Binding Sites, DNA Transposable Elements, DNA Nucleotidyltransferases, DNA-Binding Proteins, Biological Evolution, Genes, Homeobox, Genes, Immunoglobulin, Humans, Molecular Sequence Data, Proteins, Recombinant Fusion Proteins, Recombinant Proteins, Recombination, Genetic, Structure-Activity Relationship, Transfection, Homeodomain Proteins

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