期刊
CHEMPHYSCHEM
卷 10, 期 9-10, 页码 1672-1675出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.200900208
关键词
adhesins; atomic force microscopy; cell adhesion; membrane tethers; mycobacteria
资金
- National Foundation for Scientific Research (FNRS)
- Foundation for Training in Industrial and Agricultural Research (FRIA)
- Universite catholique de Louvain (Fonds Speciaux de Recherche)
- Region wallonne
- Federal Office for Scientific, Technical and Cultural Affairs
- Department of the Communaute francaise de Belgique
Understanding the molecular interactions between bacterial adhesion proteins (adhesins) and their receptors is essential for elucidating the molecular mechanisms of bacterial pathogenesis. Here, atomic force microscopy (AFM) is used to explore the specific interactions between the heparin-binding hemagglutinin (HBHA) from Mycobacterium tuberculosis, and heparan sulphate proteoglycan (HSPG) receptors on live A549 pneumocytes. First, we show that the specific binding forces between single HBHA-HSPG pairs, 57 +/- 16 pN, are similar to the forces measured earlier between HBHA and heparin molecules. Second, we mapped the distribution of single HSPG receptors on the surface of A549 cells, revealing that the proteins are widely and homogeneously exposed. Third, we observed force curves with constant force plateaus at large pulling velocities, reflecting the extraction of membrane tethers or nanotubes. These single-molecule measurements provide new avenues in pathogenesis research, particularly for elucidating the molecular basis of pathogen-host interactions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据