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    • 3. 发明授权
    • Pertussis toxin gene: cloning and expression of protective antigen
    • 百日咳毒素基因:克隆和表达保护性抗原
    • US4883761A
    • 1989-11-28
    • US843727
    • 1986-03-25
    • Jerry M. KeithCamille Locht
    • Jerry M. KeithCamille Locht
    • A61K39/00C07K14/235C12N1/21C12N15/31
    • C07K14/235A61K39/00
    • The complete nucleotide sequence of the pertussis toxin gene and the deduced amino acid sequences of the individual subunits have been determined. All five subunits are coded by closely linked cistrons and possibly expressed through a polycistronic mRNA, since a promotor-like structure was found in the 5' flanking region. The order of the cistrons is S1, S2, S3, S4, S5, and S3. All subunits contain signal peptides of variable length. The calculated molecular weights of the mature subunits are 25,024 for S1, 21,924 for S2, 21,873 for S3, 12,058 for S4 and 11,013 for S5. All subunits contain signal peptides of variable length. Subunits S2 and S3 share 70% amino acid homology and 75% nucleotide homology. Subunit S1 contains two regions of eight amino acids homologous to analogous regions in the A subunit of both cholera and E. coli heat labile toxins. Functional domains in relation to the primary structure and the development of a safer, new generation vaccine against whooping cough are presented.
    • 已确定了百日咳毒素基因的完整核苷酸序列和各亚基的推导氨基酸序列。 所有五个亚基由紧密连锁的顺反子编码,并且可能通过多顺反子mRNA表达,因为在5'侧翼区域发现启动子样结构。 顺顺顺序为S1,S2,S3,S4,S5和S3。 所有亚基含有长度可变的信号肽。 成熟亚基的计算分子量为S1,025,024,S2为21,924,S3为21,873,S4为12,058,S5为11,013。 所有亚基含有长度可变的信号肽。 亚基S2和S3具有70%的氨基酸同源性和75%的核苷酸同源性。 亚基S1含有与霍乱弧菌和大肠杆菌热不稳定毒素的A亚基中的类似区域同源的八个氨基酸的两个区域。 提出了与一般结构相关的功能性领域和开发一种更安全的新一代针对百日咳的疫苗。