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    • 57. 发明申请
    • MUTANT PNEUMOLYSIN PROTEINS
    • 突变型PNEUMOLYSIN蛋白
    • WO2005108580A1
    • 2005-11-17
    • PCT/GB2005/001792
    • 2005-05-09
    • KIRKHAM, Lea-AnnMITCHELL, Timothy John
    • KIRKHAM, Lea-AnnMITCHELL, Timothy John
    • C12N15/31
    • C07K14/3156A61K39/00C07K16/1275C07K2317/92
    • The invention relates to immunogenic compositions comprising mutant Streptococcus pneumoniae pneumolysin proteins. The invention further relates to such proteins and nucleic acids encoding these proteins. In particular embodiments, the invention is directed to an isolated mutant pneumolysin (PLY) protein, wherein the mutant PLY protein differs from the wild type PLY protein by the presence of a mutation within the region of amino acids 144 to 161 of the wild type sequence, such that the toxicity of the mutant is reduced relative to that of the wild-type protein. In particular embodiments, the mutant PLY protein differs from the wild type protein by the substitution or deletion of amino acids within this region, including the deletion of two adjacent amino acids within the region of amino acids 144 to 151 of the wild type sequence.
    • 本发明涉及包含突变型肺炎链球菌肺炎球菌蛋白的免疫原性组合物。 本发明进一步涉及这些蛋白质和编码这些蛋白质的核酸。 在具体实施方案中,本发明涉及分离的突变型肺炎溶菌素(PLY)蛋白,其中突变PLY蛋白与野生型PLY蛋白不同,野生型序列的氨基酸144至161的区域内存在突变 使得突变体的毒性相对于野生型蛋白质的毒性降低。 在具体实施方案中,突变PLY蛋白通过在该区域内的氨基酸的取代或缺失而与野生型蛋白质不同,包括在野生型序列的氨基酸144至151的区域内缺失两个相邻的氨基酸。