Nnalue N A
Department of Medical Microbiology, Faculty of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates.
Infect Immun. 1999 Feb;67(2):998-1003. doi: 10.1128/IAI.67.2.998-1003.1999.
Antisera generated against each of the nine known chemotypes of Salmonella lipopolysaccharide (LPS) core were characterized in order to delineate cross-reactive epitopes and define the bases for their accessibility. Strongly cross-reactive epitopes were associated with three chemotypes: Ra and Rb4, which recognized alpha-GlcNAc-1-->2-alpha-Glc, and Rd1, which recognized L-alpha-D-heptose-1-->7-L-alpha-D-heptose. Both these disaccharides and the more weakly cross-reactive alpha-Gal-1-->6-alpha-Glc terminal in Rb3 LPS represent branch points along the core oligosaccharide. Therefore, branch points in endotoxin core oligosaccharides may generally be cross-reactive.
为了描绘交叉反应性表位并确定其可及性的基础,对针对沙门氏菌脂多糖(LPS)核心的九种已知化学型各自产生的抗血清进行了表征。强交叉反应性表位与三种化学型相关:Ra和Rb4,它们识别α-GlcNAc-1→2-α-Glc,以及Rd1,它识别L-α-D-庚糖-1→7-L-α-D-庚糖。这两种二糖以及Rb3 LPS中交叉反应性较弱的α-Gal-1→6-α-Glc末端均代表核心寡糖上的分支点。因此,内毒素核心寡糖中的分支点通常可能具有交叉反应性。