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Imaging single glycans

机译:成像单个聚糖

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摘要

Abstract Imaging of biomolecules guides our understanding of their diverse structures and functions1,2. Real-space imaging at sub-nanometre resolution using cryo-electron microscopy has provided key insights into proteins and their assemblies3,4. Direct molecular imaging of glycans—the predominant biopolymers on Earth, with a plethora of structural and biological functions5—has not been possible so far6. The inherent glycan complexity and backbone flexibility require single-molecule approaches for real-space imaging. At present, glycan characterization often relies on a combination of mass spectrometry and nuclear magnetic resonance imaging to provide insights into size, sequence, branching and connectivity, and therefore requires structure reconstruction from indirect information7–9. Here we show direct imaging of single glycan molecules that are isolated by mass-selective, soft-landing electrospray ion beam deposition and imaged by low-temperature scanning tunnelling microscopy10. The sub-nanometre resolution of the technique enables the visualization of glycan connectivity and discrimination between regioisomers. Direct glycan imaging is an important step towards a better understanding of the structure of carbohydrates.
机译:抽象的生物分子成像指导我们对其各种结构和功能的理解。使用冷冻电子显微镜的子纳米分辨率的实时空间成像已经为蛋白质及其组装提供了关键的见解。聚糖的直接分子成像 - 地球上的主要生物聚合物,具有血于结构和生物学功能5-尚未实现这么塔。固有的聚糖复杂性和骨干灵活性需要单分子用于真实空间成像方法。目前,聚糖表征通常依赖于质谱和核磁共振成像的组合,以提供尺寸,序列,分支和连接的见解,因此需要从间接信息7-9结构重建。在这里,我们显示单甘油分子的直接成像,该聚糖分子由质量选择性,软着陆电喷雾离子束沉积和通过低温扫描隧道显微镜进行成像。该技术的亚纳米分辨率使得能够可视化甘油连接性和辨别体之间的辨别。直接甘草成像是更好地理解碳水化合物结构的重要一步。

著录项

  • 来源
    《Nature》 |2020年第7812期|375-378|共4页
  • 作者单位

    Max Planck Institute for Solid State Research;

    Max Planck Institute for Colloids and Interfaces;

    Max Planck Institute for Solid State Research;

    Max Planck Institute for Solid State Research;

    Max Planck Institute for Colloids and Interfaces;

    Max Planck Institute for Colloids and Interfaces;

    Max Planck Institute for Solid State Research;

    Max Planck Institute for Solid State Research;

    Max Planck Institute for Solid State Research|University of Oxford;

    Max Planck Institute for Solid State Research|Technische Universität Braunschweig;

    Max Planck Institute for Solid State Research;

    Max Planck Institute for Colloids and Interfaces|Free University Berlin;

    Max Planck Institute for Solid State Research|Institut de Physique École Polytechnique Fédérale de Lausanne;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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