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首页> 外文期刊>Journal of bacteriology >BB0172, a Borrelia burgdorferi Outer Membrane Protein That Binds Integrin α3β1
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BB0172, a Borrelia burgdorferi Outer Membrane Protein That Binds Integrin α3β1

机译:BB0172,一种结合整联蛋白α3β1的伯氏疏螺旋体外膜蛋白

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Lyme disease is a multisystemic disorder caused by Borrelia burgdorferi infection. Upon infection, some B. burgdorferi genes are upregulated, including members of the microbial surface components recognizing adhesive matrix molecule (MSCRAMM) protein family, which facilitate B. burgdorferi adherence to extracellular matrix components of the host. Comparative genome analysis has revealed a new family of B. burgdorferi proteins containing the von Willebrand factor A (vWFA) domain. In the present study, we characterized the expression and membrane association of the vWFA domain-containing protein BB0172 by using in vitro transcription/translation systems in the presence of microsomal membranes and with detergent phase separation assays. Our results showed evidence of BB0172 localization in the outer membrane, the orientation of the vWFA domain to the extracellular environment, and its function as a metal ion-dependent integrin-binding protein. This is the first report of a borrelial adhesin with a metal ion-dependent adhesion site (MIDAS) motif that is similar to those observed in eukaryotic integrins and has a similar function.
机译:莱姆病是由伯氏疏螺旋体感染引起的多系统疾病。感染后,B。burgdorferi基因被上调,包括识别粘附基质分子(MSCRAMM)蛋白家族的微生物表面成分的成员,这有助于B. burgdorferi粘附于宿主的细胞外基质成分。比较的基因组分析已揭示了一个新的包含von Willebrand因子A(vWFA)域的B. burgdorferi蛋白家族。在本研究中,我们通过在微粒体膜存在下使用体外转录/翻译系统并通过去污剂相分离实验,表征了含vWFA域的蛋白B​​B0172的表达和膜缔合。我们的结果显示了BB0172在外膜中的定位,vWFA结构域对细胞外环境的定向以及其作为金属离子依赖性整合素结合蛋白的功能的证据。这是首次报道具有金属离子依赖性粘附位点(MIDAS)主题的硼粘附素,与真核整合素中观察到的相似,并且具有相似的功能。

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