Genomic organization of the sheep TRG1@ locus and comparative analyses of Bovidae and human variable genes (Articolo in rivista)

Type
Label
  • Genomic organization of the sheep TRG1@ locus and comparative analyses of Bovidae and human variable genes (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Alternative label
  • Vaccarelli G., Miccoli M.C., Lanave C., Massari, S. Cribiu E.P, Ciccarese S. (2005)
    Genomic organization of the sheep TRG1@ locus and comparative analyses of Bovidae and human variable genes
    in Gene (Amst.)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Vaccarelli G., Miccoli M.C., Lanave C., Massari, S. Cribiu E.P, Ciccarese S. (literal)
Pagina inizio
  • 103 (literal)
Pagina fine
  • 114 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 357 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Dipartimento di Anatomia Patologica e di Genetica, University of Bari, Italy. Istituto di Tecnologie Biomediche-Sezione di Bari, CNR-Milano, Italy. Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali-Centro Ecotekne-University of Lecce, Italy. Departement de Genetique Animale, Centre de Recherche INRA de Jouy-en-Josas, France. (literal)
Titolo
  • Genomic organization of the sheep TRG1@ locus and comparative analyses of Bovidae and human variable genes (literal)
Abstract
  • gy T cells commonly account for 0.5%–5% of human (gy low species) circulating T cells, whereas they are very common in chickens, and they may account for >70% of peripheral cells in ruminants (gy high species). We have previously reported the ovine TRG2@ locus structure, the first complete physical map of any ruminant animal TCR locus. Here we determined the TRG1@ locus organization in sheep, reported all variable (V) gamma gene segments in their germline configuration and included human and cattle sequences in a three species comparison. The TRG1@ locus spans about 140 kb and consists of three clusters named TRG5, TRG3, and TRG1 according to the constant (C) genes. The predicted tertiary structure of cattle and sheep V proteins showed a remarkably high degree of conservation between the experimentally determined human Vg9 and the proteins belonging to TRG5 Vg subgroup. However systematic comparison of primary and tertiary structure highligthed that in Bovidae the overall conformation of the gy TCR, is more similar to the Fab fragment of an antibody than any TCR heterodimer. Phylogenetic analysis showed that the evolution of cattle and sheep V genes is related to the rearrangement process of V segments with the relevant C, and consequentely to the appartenence of the V genes to a given cluster. The TRG cluster evolution in cattle and sheep pointed out the existence of a TRG5 ancient cluster and the occurrence of duplications of its minimal structural scheme of one V, two joining ( J), and one C. (literal)
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