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Dynamic Regulation of Antigen Receptor Gene Assembly

This chapter appears in the following book:

V(D)J Recombination

Edited by: Pierre Ferrier
ISBN: TBA
» Get more information about this book at landesbioscience.com «

Chapter authors:
Lance R. Thomas, Robin Milley Cobb and Eugene M. Oltz


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A hallmark feature of adaptive immunity is the production of lymphocytes bearing an enormous repertoire of receptors for foreign antigens. This repertoire is generated early in B and T‑cell development by the process of V(D)J recombination, which randomly assembles functional immunoglobulin (Ig) and T‑cell receptor (TCR) genes from large arrays of DNA segments. Precursor lymphocytes must target then retarget a single V(D)J recombinase enzyme to distinct regions within antigen receptor loci to guide lymphocyte development and to ensure that each mature B and T‑cell expresses only a single antigen receptor specificity. Proper targeting of V(D)J recombinase is also essential to avoid chromosomal aberrations that result in lymphoid malignancies. Early studies suggested that changes in the specificity of V(D)J recombination are achieved by differentially opening or closing chromatin associated with Ig and TCR gene segments at the proper developmental time point. This accessibility model has been extended significantly in recent years and it has become clear that control mechanisms governing antigen receptor gene assembly are multifaceted and vary from locus to locus. In this chapter we review how genetic and epigenetic mechanisms as well as widespread changes in chromosomal conformation synergize to orchestrate the diversification of genes encoding B and T‑cell antigen receptors.

Lance R. Thomas

Robin Milley Cobb

Eugene M. Oltz
Department of Microbiology and Immunology, Vanderbilt University

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Additional chapters from this book:

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The developmental control of V(D)J recombination is imposed at the level of chromatin accessibility of recombination signal sequences (RSSs) to the recombinase machinery. Cis‑acting transcriptio...

Dynamic Regulation of Antigen Receptor Gene Assembly

Lance R. Thomas, Robin Milley Cobb and Eugene M. Oltz

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V(D)J recombination is initiated by the synapsis and cleavage of a complementary (12/23) pair of recombination signal sequences (RSSs) by the RAG1 and RAG2 proteins. Our understanding of these process...


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