The "dispensable" portion of RAG2 is necessary for efficient V-to-DJ rearrangement during B and T cell development

Hong Erh Liang, Lih Yun Hsu, Dragana Cado, Lindsay G. Cowell, Garnett Kelsoe, Mark S. Schlissel

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124 Scopus citations


Previous in vitro studies defined the minimal regions of RAG1 and RAG2 essential for V(D)J recombination. In order to characterize the role of the C-terminal "dispensable" portion of RAG2, we generated core-RAG2 knock-in mice. We found that the core-RAG2-containing recombinase complex is selectively defective in catalyzing V-to-DJ rearrangement at the IgH and TCRβ loci, resulting in partial developmental blocks in B and T lymphopoiesis. Analysis of recombination intermediates showed defects at the cleavage phase of the reaction. We also observed a reduction in overall recombinase activity in core-RAG2-expressing thymocytes, leading us to suggest that the interaction of a defective recombinase with RSS sequences unique to VH and Vβ gene segments may underlie the specific V-to-DJ rearrangement defect in core-RAG2 mice.

Original languageEnglish (US)
Pages (from-to)639-651
Number of pages13
Issue number5
Publication statusPublished - Nov 1 2002


ASJC Scopus subject areas

  • Immunology and Allergy
  • Infectious Diseases
  • Immunology

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