ジャーナル: Nat Commun / 年: 2022 タイトル: Structure and assembly of the S-layer in C. difficile. 著者: Paola Lanzoni-Mangutchi / Oishik Banerji / Jason Wilson / Anna Barwinska-Sendra / Joseph A Kirk / Filipa Vaz / Shauna O'Beirne / Arnaud Baslé / Kamel El Omari / Armin Wagner / Neil F ...著者: Paola Lanzoni-Mangutchi / Oishik Banerji / Jason Wilson / Anna Barwinska-Sendra / Joseph A Kirk / Filipa Vaz / Shauna O'Beirne / Arnaud Baslé / Kamel El Omari / Armin Wagner / Neil F Fairweather / Gillian R Douce / Per A Bullough / Robert P Fagan / Paula S Salgado / 要旨: 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, ...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.
履歴
登録
2020年9月11日
登録サイト: PDBE / 処理サイト: PDBE
改定 1.0
2022年3月9日
Provider: repository / タイプ: Initial release
改定 1.1
2024年6月19日
Group: Data collection / カテゴリ: chem_comp_atom / chem_comp_bond
プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray
放射波長
波長: 0.9686 Å / 相対比: 1
反射
解像度: 3.5→52.74 Å / Num. obs: 16691 / % possible obs: 98.75 % / 冗長度: 3.4 % / Biso Wilson estimate: 37.95 Å2 詳細: The Rmerge is very high for this crystal due to merging of data from 2 highly anisotropic crystals, that are also not completely isomorphous. However, this was necessary to generate ...詳細: The Rmerge is very high for this crystal due to merging of data from 2 highly anisotropic crystals, that are also not completely isomorphous. However, this was necessary to generate interpretable electron density maps, as data from either crystal separately was enough. CC1/2: 0.616 / CC star: 0.873 / Rmerge(I) obs: 0.5102 / Rpim(I) all: 0.3238 / Rrim(I) all: 0.6068 / Net I/σ(I): 10