Evolution of the Immunoglobulin Heavy Chain Class Switch Recombination Mechanism

Jayanta Chaudhuri, Uttiya Basu, Ali Zarrin, Catherine Yan, Sonia Franco, Thomas Perlot, Bao Vuong, Jing Wang, Ryan T. Phan, Abhishek Datta, John Manis, Frederick W. Alt

Research output: Contribution to journalArticle

Abstract

To mount an optimum immune response, mature B lymphocytes can change the class of expressed antibody from IgM to IgG, IgA, or IgE through a recombination/deletion process termed immunoglobulin heavy chain (IgH) class switch recombination (CSR). CSR requires the activation-induced cytidine deaminase (AID), which has been shown to employ single-stranded DNA as a substrate in vitro. IgH CSR occurs within and requires large, repetitive sequences, termed S regions, which are parts of germ line transcription units (termed "CH genes") that are composed of promoters, S regions, and individual IgH constant region exons. CSR requires and is directed by germ line transcription of participating CH genes prior to CSR. AID deamination of cytidines in S regions appears to lead to S region double-stranded breaks (DSBs) required to initiate CSR. Joining of two broken S regions to complete CSR exploits the activities of general DNA DSB repair mechanisms. In this chapter, we discuss our current knowledge of the function of S regions, germ line transcription, AID, and DNA repair in CSR. We present a model for CSR in which transcription through S regions provides DNA substrates on which AID can generate DSB-inducing lesions. We also discuss how phosphorylation of AID may mediate interactions with cofactors that facilitate access to transcribed S regions during CSR and transcribed variable regions during the related process of somatic hypermutation (SHM). Finally, in the context of this CSR model, we further discuss current findings that suggest synapsis and joining of S region DSBs during CSR have evolved to exploit general mechanisms that function to join widely separated chromosomal DSBs.

Original languageEnglish (US)
Pages (from-to)157-214
Number of pages58
JournalAdvances in Immunology
Volume94
DOIs
StatePublished - 2007

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Immunoglobulin Heavy Chains
Genetic Recombination
Germ Cells
Chromosome Pairing
Cytidine
Deamination
Double-Stranded DNA Breaks
Immunoglobulin Isotypes
Nucleic Acid Repetitive Sequences
Single-Stranded DNA
Genetic Promoter Regions
DNA Repair
Immunoglobulin A
Immunoglobulin E
Transcriptional Activation
Genes
Immunoglobulin M
Exons

ASJC Scopus subject areas

  • Immunology

Cite this

Chaudhuri, J., Basu, U., Zarrin, A., Yan, C., Franco, S., Perlot, T., ... Alt, F. W. (2007). Evolution of the Immunoglobulin Heavy Chain Class Switch Recombination Mechanism. Advances in Immunology, 94, 157-214. https://doi.org/10.1016/S0065-2776(06)94006-1

Evolution of the Immunoglobulin Heavy Chain Class Switch Recombination Mechanism. / Chaudhuri, Jayanta; Basu, Uttiya; Zarrin, Ali; Yan, Catherine; Franco, Sonia; Perlot, Thomas; Vuong, Bao; Wang, Jing; Phan, Ryan T.; Datta, Abhishek; Manis, John; Alt, Frederick W.

In: Advances in Immunology, Vol. 94, 2007, p. 157-214.

Research output: Contribution to journalArticle

Chaudhuri, J, Basu, U, Zarrin, A, Yan, C, Franco, S, Perlot, T, Vuong, B, Wang, J, Phan, RT, Datta, A, Manis, J & Alt, FW 2007, 'Evolution of the Immunoglobulin Heavy Chain Class Switch Recombination Mechanism', Advances in Immunology, vol. 94, pp. 157-214. https://doi.org/10.1016/S0065-2776(06)94006-1
Chaudhuri, Jayanta ; Basu, Uttiya ; Zarrin, Ali ; Yan, Catherine ; Franco, Sonia ; Perlot, Thomas ; Vuong, Bao ; Wang, Jing ; Phan, Ryan T. ; Datta, Abhishek ; Manis, John ; Alt, Frederick W. / Evolution of the Immunoglobulin Heavy Chain Class Switch Recombination Mechanism. In: Advances in Immunology. 2007 ; Vol. 94. pp. 157-214.
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