对炭杆毒素细胞受体的鉴定
K A Bradley1, J Mogridge, M Mourez
1McArdle Laboratory for Cancer Research, University of Wisconsin-Madison, 1400 University Avenue, Madison, Wisconsin 53706, USA.
Nature
|November 9, 2001
概括
研究人员确定了人类炭毒素受体 (ATR). 这种蛋白质与保护性抗原 (PA) 结合,并调解毒素进入细胞,为炭病治疗提供了潜在的标.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 炭杆菌分泌一种三方毒素,以逃避宿主免疫力并引起全身感染.
- 毒素成分,瘤因子 (OF) 和致死因子 (LF),通过修改细胞内基质来削弱宿主防御.
- 保护性抗原 (PA) 通过与细胞受体结合,促进毒素进入哺乳动物细胞.
研究的目的:
- 为了识别和克隆人类受体Bacillus anthracis保护性抗原 (PA).
主要方法:
- 使用遗传补充方法克隆人类PA受体.
主要成果:
- 人类的PA受体,称为ATR (炭毒素受体),被克隆.
- ATR是一种I型膜蛋白,具有细胞外威莱布兰德因子A域.
- 这个域直接与PA结合,可溶性版本可以中和毒素的作用.
结论:
- 鉴定ATR提供了一个关键的分子标,用于理解和潜在的中和炭毒素.
- ATR的PA结合域对于毒素的进入至关重要,并且代表了一个有前途的治疗标.
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