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The 3' end of the T cell receptor V beta 7.1 gene contains the five nucleotides CAAGA between the broadly conserved consensus sequence of nucleotides TGC/T GCC AGC AGC (which encode cysteine, alanine, serine and serine at positions 92-95 of the beta chain) and the heptamer that signals rearrangement. These nucleotides are frequently preserved during gene rearrangement, resulting in the common presence of glutamine at position 96 and of aspartate or glutamate at position 97 of the V beta 7.1 chain CDR3 loop in peripheral blood lymphocytes. There is selection of V beta 7.1 and of the V beta 7.1 gene-encoded glutamate at position 97 of the beta chain CDR3 loop in the cytotoxic T lymphocyte response to the HLA B2705-restricted influenza A nucleoprotein epitope SRYWAIRTR. Our results indicate that selection of V beta 7.1 gene-encoded amino acid residues on CDR3 loops may be one factor driving selection of V beta 7.1 in this response.

Original publication

DOI

10.1002/eji.1830250609

Type

Journal article

Journal

European journal of immunology

Publication Date

06/1995

Volume

25

Pages

1529 - 1534

Addresses

Institute of Molecular Medicine, John Radcliffe Hospital, Oxford, GB.

Keywords

B-Lymphocytes, T-Lymphocytes, Humans, Immunoglobulins, Receptors, Antigen, T-Cell, alpha-beta, Gene Expression Regulation, Binding Sites, Base Sequence, Molecular Sequence Data