Structure and assembly of the S-layer in C. difficile.

Structure and assembly of the S-layer in C. difficile.
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DOI:
10.1038/s41467-022-28196-w
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发表时间:
2022-02-25
影响因子:
16.6
通讯作者:
Salgado PS
Salgado PS
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Lanzoni-Mangutchi P;Banerji O;Wilson J;Barwinska-Sendra A;Kirk JA;Vaz F;O'Beirne S;Baslé A;El Omari K;Wagner A;Fairweather NF;Douce GR;Bullough PA;Fagan RP;Salgado PS

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许多细菌和古生菌都有一个二维蛋白质阵列,或称S层,覆盖在细胞表面,在细胞生理学中起着至关重要的作用。在这里,我们报告的晶体结构的SlpA,主要的S-层蛋白的细菌病原体艰难梭菌,并使用电子显微镜研究S-层的组织和组装。SlpA晶格模拟细胞中的S层组装,通过在细胞壁上方平铺三角形棱柱,由面向环境的不同脊联锁。引人注目的是,该阵列非常紧凑,与其他S层(30-100微米)相比,孔径仅为10微米。表面暴露的灵活的脊是部分的整体结构和组装,虽然缺乏这一地区的突变变得容易受到溶菌酶,在宿主防御的重要分子。因此,我们的工作提供了深入了解S层的组织,并提供了一个基础的发展C。艰难的特定疗法。S层是一个二维蛋白质阵列,覆盖了许多细菌和古细菌的细胞表面。在这里,作者使用高分辨率X射线晶体学和电子显微镜来提供细菌病原体艰难梭菌的S层组织和组装的详细见解。
Many bacteria and archaea possess a two-dimensional protein array, or S-layer, that covers the cell surface and plays crucial roles in cell physiology. Here, we report the crystal structure of SlpA, the main S-layer protein of the bacterial pathogen Clostridioides difficile, and use electron microscopy to study S-layer organisation and assembly. The SlpA crystal lattice mimics S-layer assembly in the cell, through tiling of triangular prisms above the cell wall, interlocked by distinct ridges facing the environment. Strikingly, the array is very compact, with pores of only ~10 Å in diameter, compared to other S-layers (30–100 Å). The surface-exposed flexible ridges are partially dispensable for overall structure and assembly, although a mutant lacking this region becomes susceptible to lysozyme, an important molecule in host defence. Thus, our work gives insights into S-layer organisation and provides a basis for development of C. difficile-specific therapeutics. The S-layer is a two-dimensional protein array that covers the cell surface of many bacteria and archaea. Here, the authors use high-resolution X-ray crystallography and electron microscopy to provide detailed insights into S-layer organisation and assembly for the bacterial pathogen Clostridioides difficile.
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