ArticleBMC genomics2010
Extensive analysis of D-J-C arrangements allows the identification of different mechanisms enhancing the diversity in sheep T cell receptor beta-chain repertoire.
Article in BMC genomics, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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12 citing papers in PubMed, 29 citations in OpenAlex.
- IMGTAntibodies (Basel, Switzerland) · 2026Review
- Sequence Diversity and Expression Profiles of T Cell Receptor Beta Chain Constant Genes TRBC1 and TRBC2 in Canine Lymphoid Tumour Cell Lines and Normal Lymphocytes.Veterinary and comparative oncology · 2025Article
- A Comprehensive Analysis of the Genomic and Expressed Repertoire of the T-Cell Receptor Beta Chain inAnimals : an open access journal from MDPI · 2024Article
- Multiple strategies, including 6mA methylation, affecting plant alternative splicing in allopolyploid peanut.Plant biotechnology journal · 2024Article
- The T Cell Receptor (TRB) Locus inGenes · 2021Article
- Article
- The expansion of the TRB and TRG genes in domestic goats (Capra hircus) is characteristic of the ruminant species.BMC genomics · 2020Article
- IMGT® Biocuration and Comparative Study of the T Cell Receptor Beta Locus of Veterinary Species Based onFrontiers in immunology · 2020Article
- The Camel Adaptive Immune Receptors Repertoire as a Singular Example of Structural and Functional Genomics.Frontiers in genetics · 2019Review
- Overview of the Germline and Expressed Repertoires of the TRB Genes inFrontiers in immunology · 2018Article
- Data characterizing the genomic structure of the T cell receptor (TRB) locus inData in brief · 2017Article
- Sheep (Ovis aries) T cell receptor alpha (TRA) and delta (TRD) genes and genomic organization of the TRA/TRD locus.BMC genomics · 2015Article
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundIn most species of mammals, the TRB locus has the common feature of a library of TRBV genes positioned at the 5'- end of two in tandem aligned D-J-C gene clusters, each composed of a single TRBD gene, 6-7 TRBJ genes and one TRBC gene. An enhancer located at the 3'end of the last TRBC and a well-defined promoter situated at the 5'end of the TRBD gene and/or a undefined promoter situated at the 5'end of the TRBD2 are sufficient to generate the full recombinase accessibility at the locus. In ruminant species, the 3'end of the TRB locus is characterized by the presence of three D-J-C clusters, each constituted by a single TRBD, 5-7 TRBJ and one TRBC genes with the center cluster showing a structure combined with the clusters upstream and downstream, suggesting that a unequal crossover occurred in the duplication. An enhancer downstream the last TRBC, and a promoter at the 5'-end of each TRBD gene are also present.
resultsIn this paper we focused our attention on the analysis of a large number of sheep TR beta-chain transcripts derived from four different lymphoid tissues of three diverse sheep breed animals to certify the use and frequency of the three gene clusters in the beta-chain repertoire. As the sheep TRB locus genomic organization is known, the exact interpretation of the V-D-J rearrangements was fully determined. Our results clearly demonstrate that sheep beta-chain constitutes a level of variability that is substantially larger than that described in other mammalian species. This is due not only to the increase of the number of D and J genes available to the somatic recombination, but also to the presence of the trans-rearrangement process. Moreover, the functional complexity of beta-chain repertoire is resolved by other mechanisms such as alternative cis- and trans-splicing and recombinational diversification that seems to affect the variety of the constant region.
conclusionAll together our data demonstrate that a disparate set of molecular mechanisms operate to perform a diversified repertoire in the sheep beta-chain and this could confer some special biological properties to the corresponding alphabeta T cells in the ruminant lineage.
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