Pertussis toxin mutants and bordetella strains producing toxin

    公开(公告)号:IT1238007B

    公开(公告)日:1993-06-21

    申请号:IT1928690

    申请日:1990-02-07

    Applicant: SCLAVO SPA

    IPC: C12K

    Abstract: The toxin mutants (A) have at least one of the amino acid (AA) residues Glu129, Asp11, Trp26, Arg9, Phe50, Asp1, Arg13, Tyr130, Gly86, Ile88, Tyr89, Tyr8, Gly44, Thr53 and Gly80 of subunit S1 deleted and substd. by a natural AA. Also claimed are (a) Bordetella strains comprising (i) the gene encoding the wild type pertussin toxin; (ii) an expression and secretion regulation sequence; with the mutated subunit S1. E.g. Bordetella pertussis (W28)PT-9K/129G ATCC53894; B.parapertussis PT-129G ATCC 53892, PT-26l/129G ATCC 53893; B.bronchiseptica; (b) an immunogenic formulation. Details for obtg. (A) and Bordetella strains are given. Six specific examples of (A) are given, e.g. PT-13l/129G and PT-88E/89S have AA Glu129 + Arg13 and Ile88 + Tyr89 substd. by Gly+Ile and Glu+Ser respectively. (A), stable at 37 deg.C, have reduced or no mitogenicity of haemagglutinin activity and are obtd. by 0.035% and 0.42% formaldehyde treatment.

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