相关实验视频
Updated: Jan 17, 2026

03:57
Microtiter Dish Biofilm Formation Assay
Published on: January 30, 2011
114.0K
Pseudomonas 生物膜形成功能性粉样蛋白 FapC 形成的结构基础
Kasper Holst Hansen1,2, Mert Golcuk3, Chang Hyeock Byeon1
1Department of Structural Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA.
Science advances
|September 24, 2025
概括
这项研究揭示了FapC的结构,FapC是Pseudomonas aeruginosa生物膜中的一个关键的粉样蛋白. 了解它的组装为治疗慢性感染和打击抗菌素耐药性提供了新的目标.
科学领域:
- 结构生物学 结构生物学
- 微生物学 微生物学
- 生物物理学的生物物理.
背景情况:
- 慢性感染* Pseudomonas aeruginosa *通常与生物膜有关.
- FapC 是一种关键的功能性粉样蛋白,对*伪omonas*生物膜完整性至关重要.
- 以前,FapC的详细结构及其组装机制是未知的.
研究的目的:
- 为了确定FapC纤维的高分辨率结构.
- 为了阐明FapC粉样蛋白生物发生的机制,从单体到纤维.
- 为开发抗生物膜疗法提供结构和机制基础.
主要方法:
- 综合性结构生物学方法结合了NMR,冷EM和MD模拟.
- 解决方案核磁共振 (NMR) 用于单质FapC结构.
- 电子显微镜 (cryo-EM) 检测纤维结构,分辨率为3.3 Å.
- 所有原子分子动力学 (MD) 模拟用于组装/拆卸路径.
主要成果:
- 从未折叠的单体到纤维的FapC生物发生的完整结构图得到了.
- 低温电磁波检测显示了一种独特的不规则的三层β-solenoid交叉β纤维结构.
- MD模拟提供了对FapC粉样蛋白组装和拆卸的机械洞察力.
结论:
- 假菌使用像FapC这样的功能性粉样蛋白来形成强大的生物膜.
- 确定的结构和机制为准FapC提供了基础.
- 这项研究为针对生物膜相关感染和抗菌素耐药性的新疗法铺平了道路.
相关概念视频
Amyloid Fibrils
11.6K
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
11.6K
Amyloid Fibrils
6.3K
6.3K
Biofilms
1.2K
Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
1.2K
Surface Appendages of Archaea
606
Archaeal surface appendages are highly specialized structures essential for environmental adaptation, encompassing roles in adhesion, biofilm formation, and motility. Among these appendages, pili and archaella stand out for their distinct morphologies and functionalities, enabling archaea to thrive in diverse and often extreme environments.Pili: Adhesion and Biofilm FormationPili are filamentous structures assembled from pilin protein subunits, primarily contributing to adhesion and biofilm...
606
Mechanism of Filopodia Formation
3.1K
Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
3.1K
Fimbriae, Pili, and Axial Filaments
1.6K
Fimbriae and pili are specialized bacterial surface structures that play pivotal roles in adhesion, genetic exchange, and motility. Composed primarily of pilin protein, these hairlike appendages are crucial for bacterial survival and pathogenicity in various environments.Fimbriae: Adhesion and PathogenicityFimbriae are fine, filamentous structures measuring 2–10 nanometers in diameter and are densely distributed on the bacterial cell surface. They facilitate bacterial adhesion to abiotic...
1.6K

