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    • 4. 发明授权
    • Neisseria mutants, lipooligosaccharides and immunogenic compositions
    • 奈瑟氏球菌突变体,脂寡糖和免疫原性组合物
    • US07807181B2
    • 2010-10-05
    • US10508309
    • 2003-03-20
    • David S. StephensYih-Ling TzengSusu ZughaierShanta Zimmer
    • David S. StephensYih-Ling TzengSusu ZughaierShanta Zimmer
    • A61K39/02A61K39/095A61K39/38A01N43/04C07H1/00
    • C12N15/52A61K39/095A61K2039/522A61K2039/523A61K2039/53C07K14/22C07K2319/23
    • Provided herein are mutant strains of Neisseria meningitidis which produce Kdo-free lipid A as well as the Kdo-free lipid A molecules and immunogenic compositions containing such Kdo-free lipid A molecules from a Neisseria strain containing a genetically stable mutation which inactivates a gene selected from the group consisting of genes encoding arabinose-5-phosphate isomerase, CMP-Kdo synthetase and CMP-Kdo transferase. N. meningitidis NMB206 is a specifically exemplified strain which harbors a stable insertion mutation in the gene (kpsF) encoding A5P isomerase; strain NMB-249 is a specifically exemplified strain with a stable insertion mutation in the gene (kdtA) encoding CMP-Kdo synthetase, and strain NMB259 is specifically exemplified strain with a stable insertion mutation in the gene (kdsB) encoding CMP-Kdo transferase. Also provided by the present invention are methods for the production of Lipid A flee of 3-keto-3-deoxyoctanoic acid using these genetically stable N. meningitidis mutants. Also describes is pYT250, a plasmid functional in neisseriae and in enterics such as Escherichia coli.
    • 本文提供脑膜炎奈瑟球菌的突变菌株,其产生不含Kdo的脂质A以及不含Kdo的脂质A分子和含有来自包含基因稳定突变的不含Kdo的脂质A分子的免疫脂质A分子的灭活组合,所述遗传稳定突变使选择的基因失活 来自编码阿拉伯糖-5-磷酸异构酶,CMP-Kdo合成酶和CMP-Kdo转移酶的基因组。 脑膜炎奈瑟球菌NMB206是在编码A5P异构酶的基因(kpsF)中具有稳定插入突变的特异性例证菌株; 菌株NMB-249是编码CMP-Kdo合成酶的基因(kdtA)中具有稳定插入突变的特异性例证菌株,并且菌株NMB259具体示例是在编码CMP-Kdo转移酶的基因(kdsB)中具有稳定插入突变的菌株。 本发明还提供了使用这些遗传稳定的脑膜炎奈瑟球菌突变体生产3-酮-3-脱氧辛酸脂质A的方法。 还描述了pYT250,一种在奈瑟氏菌中和在诸如大肠杆菌等肠道中功能的质粒。