Detailed Investigation of the Immunodominant Role of O-Antigen Stoichiometric O-Acetylation as Revealed by Chemical Synthesis, Immunochemistry, Solution Conformation and STD-NMR Spectroscopy for<i>Shigella flexneri</i> 3a
作者:Julien Boutet、Pilar Blasco、Catherine Guerreiro、Françoise Thouron、Sylvie Dartevelle、Farida Nato、F. Javier Cañada、Ana Ardá、Armelle Phalipon、Jesús Jiménez-Barbero、Laurence A. Mulard
DOI:10.1002/chem.201600567
日期:2016.7.25
bacillary dysentery. Its O‐antigen has the 2)‐[α‐d‐Glcp‐(1→3)]‐α‐l‐Rhap‐(1→2)‐α‐l‐Rhap‐(1→3)‐[Ac→2]‐α‐l‐Rhap‐(1→3)‐[Ac→6]≈40 %‐β‐d‐GlcpNAc‐(1→} ([(E)ABAcCAcD]) repeating unit, and the non‐O‐acetylated equivalent defines S. flexneri X. Propyl hepta‐, octa‐, and decasaccharides sharing the (E′)A′BAcCD(E)A sequence, and their non‐O‐acetylated analogues were synthesized from a fully protected BAcCD(E)A allyl
弗氏志贺氏菌 3a引起细菌性痢疾。其O-抗原具有2) - [α- d -Glc p - (1→3)] - α-升-RHA p - (1→2)-α-升-RHA p - (1→3) ‐ [Ac→2] ‐α ‐ l ‐Rha p ‐(1→3)‐ [Ac→6] ≈40% ‐β‐ d ‐Glc p NAc‐(1→}([[E)AB Ac C Ac d])的重复单元,并且所述非ö -acetylated等效限定弗氏志贺菌 X.丙基七- ,八,十糖和共享(E')A'B AC CD(E)序列,和它们的非Ø从完全保护的B Ac CD(E)A烯丙基糖苷合成‐乙酰化的类似物。逐步引入正交保护的单糖和二糖亚氨酸酯供体,然后进行两步脱保护过程。通过抑制酶联免疫吸附测定(ELISA)和STD-NMR光谱研究了与二十六个弗氏链球菌3a型和X二糖结合至十糖的单克隆抗体。表位作图显示,2 C-乙酸盐主导了单克隆IgG和IgM抗体的识别,而B