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V(D)J recombination (variable–diversity–joining rearrangement) is the mechanism of somatic recombination that occurs only in developing lymphocytes during the early stages of T and B cell maturation. It results in the highly diverse repertoire of antibodies/immunoglobulins and T cell receptors (TCRs) found in B cells and T cells, respectively.
[7] [17] [18] Although expression is typically found to be in the primary lymphoid organs, recent work has suggested that stimulation via antigen can result in secondary TdT expression along with other enzymes needed for gene rearrangement outside of the thymus for T-cells. [19] Patients with acute lymphoblastic leukemia greatly over-produce ...
The RAG proteins initiate V(D)J recombination, which is essential for the maturation of pre-B and pre-T cells. Activated mature B cells also possess two other remarkable, RAG-independent phenomena of manipulating their own DNA: so-called class-switch recombination (AKA isotype switching) and somatic hypermutation (AKA affinity maturation). [2]
Generation of junctional diversity through recombination illustrated between two gene segments: D (blue) and J (green). Sections highlighted in red show nucleotides added at each stage. Junctional diversity describes the DNA sequence variations introduced by the improper joining of gene segments during the process of V(D)J recombination.
n/a Ensembl n/a n/a UniProt n a n/a RefSeq (mRNA) n/a n/a RefSeq (protein) n/a n/a Location (UCSC) n/a n/a PubMed search n/a Wikidata View/Edit Human T cell receptor gamma locus is a protein that in humans is encoded by the TRG gene, also known as TCRG or TRG@. It contributes the gamma (γ) chain to the larger TCR protein (T-cell receptor). Function T cell receptors recognize foreign antigens ...
As the name suggests, T-cell large granular lymphocyte leukemia is characterized by involvement of cytotoxic-T cells). [2] In a study based in the US, the average age of diagnosis was 66.5 years [3] whereas in a French study the median age at diagnosis was 59 years (with an age range of 12–87 years old). [4]