...
首页> 外文期刊>Science Advances >Human β-defensin 2 kills Candida albicans through phosphatidylinositol 4,5-bisphosphate–mediated membrane permeabilization
【24h】

Human β-defensin 2 kills Candida albicans through phosphatidylinositol 4,5-bisphosphate–mediated membrane permeabilization

机译:人类β-防御素2通过磷脂酰肌醇4,5-双磷酸酯介导的膜通透性杀死白色念珠菌

获取原文
           

摘要

Human defensins belong to a subfamily of the cationic antimicrobial peptides and act as a first line of defense against invading microbes. Their often broad-spectrum antimicrobial and antitumor activities make them attractive for therapeutic development; however, their precise molecular mechanism(s) of action remains to be defined. We show that human β-defensin 2 (HBD-2) permeabilizes Candida albicans cell membranes via a mechanism targeting the plasma membrane lipid phosphatidylinositol 4,5-bisphosphate (PIP2). We determined the structure of HBD-2 bound to PIP2, which revealed two distinct PIP2-binding sites, and showed, using functional assays, that mutations in these sites ablate PIP2-mediated fungal growth inhibition by HBD-2. Our study provides the first insight into lipid-mediated human defensin membrane permeabilization at an atomic level and reveals a unique mode of lipid engagement to permeabilize cell membranes.
机译:人防御素属于阳离子抗菌肽的一个亚家族,是抵御入侵微生物的第一道防线。它们通常具有广谱的抗微生物和抗肿瘤活性,因此对治疗发展具有吸引力。然而,它们的确切分子作用机理还有待确定。我们显示人β-防御素2(HBD-2)通过针对质膜脂质磷脂酰肌醇4,5-双磷酸酯(PIP2)的机制透化白色念珠菌细胞膜。我们确定了与PIP2结合的HBD-2的结构,该结构揭示了两个不同的PIP2结合位点,并使用功能分析显示,这些位点中的突变消除了HBD-2介导的PIP2介导的真菌生长抑制作用。我们的研究在脂质水平上首次了解了脂质介导的人防卫素膜的透化作用,并揭示了脂质参与透化细胞膜的独特模式。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号