title: Direct evidence for chromosomal inversion during T-cell receptor beta-gene rearrangements.
abstract: A germline T-cell receptor variable region (V beta) gene segment (V beta 14) has been mapped 10 kilobases to the 3' side of the constant region (C beta 2) gene. The V beta 14 gene segment is in an inverted transcriptional polarity relative to the diversity-region (D beta) and joining-region (J beta) gene segments and the C beta genes. Analyses of a T-cell clone (J 6.19), which has productively rearranged the V beta 14 gene segment, indicate that the productive V beta-D beta-J beta rearrangement and its reciprocal flank recombination product are linked and located at either border of a chromosomal inversion. These data demonstrate for the first time a linkage between mammalian V and C genes and verify that a functional T-cell receptor V beta gene can be constructed through a chromosomal inversion.
mesh_terms: D000595:Amino Acid Sequence; D002454:Cell Differentiation; D007446:Chromosome Inversion; D005796:Genes; D005854:Germ Cells / Q000502:physiology; D006801:Humans; D011948:Receptors, Antigen, T-Cell / Q000235:genetics*; D011995:Recombination, Genetic; D013601:T-Lymphocytes / Q000502:physiology
chemical_list: D011948:Receptors, Antigen, T-Cell