Structural organization of the hCTLA-1 gene encoding human granzyme B

Patrick Haddad, Marie Véronique Clément, Olivier Bernard, Christian Jacques Larsen, Laurent Degos, Marilyne Sasportes, Danièle Mathieu-Mahul

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    Abstract

    Cytotoxic T lymphocytes (CTLs) and natural killer/lymphokine-activated cells produce granzymes, a family of serine esterase proteins located in cytoplasmic granules. These might be involved in different cytotoxic pathways. We report the structural organization of the human gene encoding granzyme B (hCTLA-1). A 4.75-kb genomic DNA fragment containing all the sequences of granzyme B-encoding cDNA clones has been sequenced. The gene is composed of five exons and four introns. A comparison with the genomic organization of murine CCP1/CTLA-1 showed very similar structure and a 76% nucleotide homology in the coding sequences. This suggests that both genes may have a common ancestor. No typical regulatory element was detected in the 1160 bp upstream from the ATG start codon. The detection of a second locus related to hCTLA-1 is also described.

    Original languageEnglish
    Pages (from-to)265-271
    Number of pages7
    JournalGene
    Volume87
    Issue number2
    DOIs
    Publication statusPublished - 15 Mar 1990

    Keywords

    • Recombinant DNA
    • T lymphocyte
    • cloning
    • cytotoxicity
    • perforin
    • phage λ vector
    • plasmid
    • serine esterase

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