Domains And Epitopes Of Meningococcal Protein NMB1870
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    发明申请
    Domains And Epitopes Of Meningococcal Protein NMB1870 审中-公开
    脑膜炎球菌蛋白NMB1870的结构域和表位

    公开(公告)号:US20090285845A1

    公开(公告)日:2009-11-19

    申请号:US11661665

    申请日:2005-09-01

    摘要: ‘NMB1870’ is a known surface protein in Neisseria meningitidis expressed across all serogroups. It has three distinct families. Serum raised against a given family is bactericidal within the same family, but is not active against strains which express one of the other two families i.e. intra-family but not inter-family cross-protection. The inventors have found that NMB1870 can be divided into domains, and that not all domains are required for antigenicity. Antigenic domains can be taken from each of the three NMB1870 families and expressed as a single polypeptide chain. The inventors have also found that NMB1870 exposes some of its epitopes in surface loops situated between alpha helices, and that substitution of loop epitopes from one family into the loop position in another family allows chimeric NMB1870 to be produced with multi-family antigenicity. Thus chimeric NMB1870 proteins are provided that comprise portions of NMB1870 from different families.

    摘要翻译: “NMB1870”是脑膜炎奈瑟氏球菌在所有血清群中表达的已知表面蛋白质。 它有三个不同的家庭。 对同一家庭提起的血清是在同一家庭内具有杀菌作用,但对于表达其他两个家族之一,即家庭内部而不是家族间交叉保护的菌株不起作用。 发明人已经发现,NMB1870可以分为多个结构域,并不是所有的域都是抗原性所必需的。 抗原结构域可以从三个NMB1870家族中的每一个获取,并且表达为单个多肽链。 本发明人还发现NMB1870在位于α-螺旋之间的表面循环中暴露了其一些表位,并且将一个家族的环表位置换为另一家族的环位置允许以多家族抗原性产生嵌合NMB1870。 因此,提供了嵌合NMB1870蛋白,其包含来自不同家族的NMB1870的部分。