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Bandpass emission filter 690/70 H

Company: AHF
Catalog#: F49-691
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Superresolution Microscopy of Drosophila Indirect Flight Muscle Sarcomeres
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2020-06-20
[Abstract]  Sarcomeres are extremely highly ordered macromolecular assemblies where proper structural organization is an absolute prerequisite to the functionality of these contractile units. Despite the wealth of information collected, the exact spatial arrangement of many of the H-zone and Z-disk proteins remained unknown. Recently, we developed a powerful nanoscopic approach to localize the sarcomeric protein components with a resolution well below the diffraction limit. The ease of sample preparation and the near crystalline structure of the Drosophila flight muscle sarcomeres make them ideally suitable for single molecule localization microscopy and structure averaging. Our approach allowed us to determine the position of dozens of H-zone and Z-disk proteins with a quasi-molecular, ... [摘要]  [摘要] 肉瘤是高度​​有序的大分子组装体,其中适当的结构组织是这些可收缩单位功能的绝对前提。尽管收集到大量信息,但许多H区和Z盘蛋白的确切空间排列最近未知的是,我们开发了一种强大的纳米方法来定位肌氨酸蛋白成分,其分辨率远低于衍射极限。样品制备的简便性和果蝇的近晶体结构 飞行肌肉瘤使其非常适合单分子定位显微镜检查和结构平均。我们的方法使我们能够以大约5-10 nm的准分子定位精度确定数十个H区和Z盘蛋白的位置。下文所述的协议为制备用于dSTORM成像的单个肌原纤维提供了一种简便且可重现的方法,此外还包括对定制的免费提供的软件工具箱的深入描述,以处理和定量分析原始定位数据。

[背景 ] 肉瘤的结构已通过X射线晶体学以及各种EM方法进行了详细研究,从而形成了来自许多物种的细丝和粗丝的准原子模型。尽管如此,这些检查取得了很好的结果对于肌动蛋白-肌球蛋白重叠区的了解,I带和H区复合物的空间排列仍是未知之数。荧光超分辨率显微镜(也称为纳米显微镜)的最新进展提供了远低于衍射极限的空间分辨率。值得注意的是,单分子定位显微镜(SMLM)可以非常高精度地提供多蛋白复合物的定位图,实际上达到了单个蛋白的大小分辨率(Sigal et al。,2018)。

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