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    • 4. 发明授权
    • Non-IgA Fc binding forms of the group B streptococcal &bgr; antigens
    • B组链球菌β抗原的非IgA Fc结合形式
    • US06280738B1
    • 2001-08-28
    • US08923992
    • 1997-09-05
    • Joseph Y. TaiMilan S Blake
    • Joseph Y. TaiMilan S Blake
    • A61K3909
    • C07K14/315A61K39/00Y10S424/831Y10S530/825
    • A-X202X203X204X205X206X207X208X209X210X211X212X213-B, wherein A represents amino acid residues 38-201 of SEQ ID NO: 2, B represents a sequence starting from amino acid 214 of SEQ ID NO: 2 and terminating at an amino acid between residues 1131 and 1164, inclusive, of SEQ ID NO: 2, and X202 through X213 are each selected independently from Ala, Val, Leu, Ile, Pro, Met, Phe, Trp, a bond, or a wild-type amino acid as found at a corresponding position of residues 202-213 of SEQ ID NO: 2, with the proviso that at least one of X202 through X213, inclusive, is other than the wild type amino acid found at the corresponding position of SEQ ID NO: 2. The LPXTG motif, as found in the native protein at amino acid residues corresponding to residues 1132-1136 of SEQ ID NO: 2, may be deleted in the sequence of the mutant C&bgr; protein. The mutant C&bgr; protein is conjugated to a streptococcal capsular polysacharide in a vaccine composition, also having an acceptable pharmaceutical carrier, for use in a method of including an immune response in an animal. Nucleic acid molecules encoding the mutant protein, vectors containing these molecules, and host cells transformed therewith are also disclosed.
    • A-X202X203X204X205X206X207X208X209X210X211X212X213-B,其中A表示SEQ ID NO:2的氨基酸残基38-201,B表示从SEQ ID NO:2的氨基酸214开始并终止于残基1131和1164之间的氨基酸 ,SEQ ID NO:2,X202〜X213各自独立地选自Ala,Val,Leu,Ile,Pro,Met,Phe,Trp,键或野生型氨基酸, SEQ ID NO:2的残基202-213,条件是X202至X213中的至少一个不包括在SEQ ID NO:2的相应位置发现的野生型氨基酸。LPXTG基序作为 在对应于SEQ ID NO:2的残基1132-1136的氨基酸残基处的天然蛋白质中发现的,可以在突变型Cbeta蛋白质的序列中缺失。 在具有可接受的药物载体的疫苗组合物中,突变体Cbeta蛋白质与链球菌荚膜多糖偶联,用于在动物中包含免疫应答的方法。 还公开了编码突变蛋白的核酸分子,含有这些分子的载体和用其转化的宿主细胞。