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Title of the item:

Epigenetic aspects of lymphocyte antigen receptor gene rearrangement or ‘when stochasticity completes randomness’

Title :
Epigenetic aspects of lymphocyte antigen receptor gene rearrangement or ‘when stochasticity completes randomness’
Authors :
Jaeger, Sébastien
Fernandez, Bastien
Ferrier, Pierre
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Subject Terms :
MESH: V(D)J Recombination/genetics
MESH: Animals
Review Articles
immunoglobulin
MESH: Receptors, Antigen, T-Cell/immunology
MESH: Gene Rearrangement, T-Lymphocyte/immunology
[SDV.IMM.II]Life Sciences [q-bio]/Immunology/Innate immunity
MESH: Epigenesis, Genetic/genetics
MESH: T-Lymphocytes/immunology
MESH: Humans
chromatin
MESH: Stochastic Processes
epigenetics
V(D)J recombination
allelic exclusion
MESH: V(D)J Recombination/immunology
MESH: Epigenesis, Genetic/immunology
MESH: T-Lymphocytes/metabolism
MESH: Models, Immunological
MESH: Receptors, Antigen, T-Cell/genetics
MESH: Models, Genetic
MESH: Gene Rearrangement, T-Lymphocyte/genetics
T-cell receptor
Source :
Immunology, Wiley, 2013, 139 (2), pp.141-150. ⟨10.1111/imm.12057⟩
Publisher :
Blackwell Science Inc, 2013.
Publication Year :
2013
Collection :
INRIA_a_CCSD_electronic_archive_server
Datacite
Hyper_Article_en_Ligne
Original Identifier :
pmc: PMC3647179
pmid: 23278765
Language :
English
ISSN :
1365-2567
0019-2805
DOI :
10.1111/imm.12057
International audience; To perform their specific functional role, B and T lymphocytes, cells of the adaptive immune system of jawed vertebrates, need to express one (and, preferably, only one) form of antigen receptor, i.e. the immunoglobulin or T-cell receptor (TCR), respectively. This end goal depends initially on a series of DNA cis-rearrangement events between randomly chosen units from separate clusters of V, D (at some immunoglobulin and TCR loci) and J gene segments, a biomolecular process collectively referred to as V(D)J recombination. V(D)J recombination takes place in immature T and B cells and relies on the so-called RAG nuclease, a site-specific DNA cleavage apparatus that corresponds to the lymphoid-specific moiety of the VDJ recombinase. At the genome level, this recombinase's mission presents substantial biochemical challenges. These relate to the huge distance between (some of) the gene segments that it eventually rearranges and the need to achieve cell-lineage-restricted and developmentally ordered routines with at times, mono-allelic versus bi-allelic discrimination. The entire process must be completed without any recombination errors, instigators of chromosome instability, translocation and, potentially, tumorigenesis. As expected, such a precisely choreographed and yet potentially risky process demands sophisticated controls; epigenetics demonstrates what is possible when calling upon its many facets. In this vignette, we will recall the evidence that almost from the start appeared to link the two topics, V(D)J recombination and epigenetics, before reviewing the latest advances in our knowledge of this joint venture.
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