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首页> 外文期刊>Infection and immunity >Phage Antibodies Obtained by Competitive Selection on Complement-Resistant Moraxella (Branhamella)catarrhalis Recognize the High-Molecular-Weight Outer Membrane Protein
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Phage Antibodies Obtained by Competitive Selection on Complement-Resistant Moraxella (Branhamella)catarrhalis Recognize the High-Molecular-Weight Outer Membrane Protein

机译:通过竞争选择抗补体莫拉氏菌(Branhamella)卡他类获得的噬菌体抗体识别高分子量外膜蛋白。

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We used competitive panning to select a panel of 10 different human antibodies from a large semisynthetic phage display library that distinguish between serum complement-resistant and complement-sensitive strains of the gram-negative diplococcus Moraxella(Branhamella) catarrhalis. Western blotting analyses and inhibition enzyme-linked immunosorbent assays showed that all phage antibodies were directed against the same or closely spaced epitopes on the target protein, which is the high-molecular-weight outer membrane protein (HMW-OMP) of M. catarrhalis. HMW-OMP was found in multiple isolates of complement-resistant but not complement-sensitive M. catarrhalis strains. Nucleotide sequence analysis demonstrated that the immunoglobulin heavy- and light-chain variable-region genes encoding the 10 phage antibodies were remarkably similar, with a strong preference for basic amino acid residues in the heavy-chain CDR3 regions. This is the first report showing that competitive panning is a successful procedure to obtain phage antibodies against differentially expressed structures on phenotypically dissimilar strains of prokaryotic cells.
机译:我们使用竞争性淘选从大型半合成噬菌体展示文库中选择了10种不同的人类抗体,以区分革兰氏阴性双球菌莫拉克氏菌 Branhamella 卡他氏菌。 Western印迹分析和抑制酶联免疫吸附试验表明,所有噬菌体抗体均针对目标蛋白上的相同或紧密间隔的表位,这是 M的高分子量外膜蛋白(HMW-OMP) 。卡他性炎。 HMW-OMP被发现具有多个抗补体但对补体敏感的 M分离株。卡他氏菌菌株。核苷酸序列分析表明,编码10个噬菌体抗体的免疫球蛋白重链和轻链可变区基因非常相似,其中重链CDR3区的碱性氨基酸残基具有很高的偏好。这是第一份表明竞争性淘选是成功的方法,用于获得针对原核细胞表型不同的菌株上差异表达的结构的噬菌体抗体。

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