Evans Medical Limited

Medeva Pharma Limited

Jeffrey J Clare

Michael A Romanos

Neil F Fairweather

Andrew J Makoff

Production of Bordetella pertactin antigens by expression in the methyltrophic yeast, Pichia; expression vectors containing DNA encoding the antigens and Pichia transformants containing the one of more copies of the DNA encoding a pertactin antigen.

Transformed Pichia expressing the pertactin antigen

Expression of tetanus toxin fragment C is accomplished employing a DNA coding sequence having a (G+C)-content that has been increased in the region from nucleotide 410 to the 3' end of the coding sequence relative to the wild-type DNA sequence. This allows the production of complete mRNA transcripts. Typically the (G+C)-content is increased in the following regions: (i) nucleotides 510-710, (ii) nucleotides 650-850, (iii) nucleotides 800-1100, (iv) nucleotides 900-1200 and (v) nucleotides 1100-1356. These regions in wild-type DNA encompass terminator sequences.

Expression of tetanus toxin fragment C in yeast

Expression of tetanus toxin fragment C is accomplished employing a DNA coding sequence having a (G+C)-content that has been increased in the region from nucleotide 410 to the 3' end of the coding sequence relative to the wild-type DNA sequence. This allows the production of complete mRNA transcripts. Typically the (G+C)-content is increased in the following regions: (i) nucleotides 510-710, (ii) nucleotides 650-850, (iii) nucleotides 800-1100, (iv) nucleotides 900-1200 and (v) nucleotides 1100 to the 3' end of the coding sequence. The (G+C)-content may also be increased in the region of nucleotides 410-610. These regions in the wild-type DNA encompass terminator sequences.

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Beckenham, United Kingdom

Jeffrey J Clare