Evans Medical Limited

Other

Andrew J Makoff

Neil F Fairweather

Jeffrey J Clare

Michael A Romanos

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

The present invention relates to an expression vector encoding mature fragment C of tetanus toxin. The invention further relates to an E. coli host transformed by that vector and to a process for producing mature fragment C of tetanus toxin using same.

Expression of tetanus toxin fragment C

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

Andrew J Makoff