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固定相的冷冻电子断层扫描

Cryo-electron tomography of stationary phase .

作者信息

Khanna Kanika, Welch Matthew D

机构信息

Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, United States.

Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, California, United States.

出版信息

MicroPubl Biol. 2024 Apr 24;2024. doi: 10.17912/micropub.biology.001178. eCollection 2024.

DOI:10.17912/micropub.biology.001178
PMID:38725941
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11079643/
Abstract

species belonging to the pseudomallei group include significant human and animal pathogens as well as the non-pathogenic species . These bacteria co-opt the host cell machinery for their replication and spread between host cells. Thus, it is of interest to understand the structural features of these cells that contribute to host cell colonization and virulence. This study provides high-resolution cryo-electron tomograms of stationary phase . It reveals the presence of compact nucleoids and storage granules, as well as examples of the type III secretion system and chemoreceptor arrays. The data can be used to investigate the near-atomic structure of stationary-phase bacterial macromolecules, such as ribosomes.

摘要

类鼻疽杆菌属的细菌包括重要的人类和动物病原体以及非致病物种。这些细菌利用宿主细胞机制进行复制并在宿主细胞间传播。因此,了解这些有助于宿主细胞定殖和毒力的细胞结构特征很有意义。本研究提供了稳定期的高分辨率冷冻电子断层扫描图。它揭示了致密类核和储存颗粒的存在,以及III型分泌系统和化学感受器阵列的实例。这些数据可用于研究稳定期细菌大分子(如核糖体)的近原子结构。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5966/11079643/2282b3c4df27/25789430-2024-micropub.biology.001178.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5966/11079643/2282b3c4df27/25789430-2024-micropub.biology.001178.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5966/11079643/2282b3c4df27/25789430-2024-micropub.biology.001178.jpg

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本文引用的文献

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Reentrant DNA shells tune polyphosphate condensate size.回文 DNA 壳可调节多聚磷酸盐凝聚物的大小。
Nat Commun. 2024 Oct 26;15(1):9258. doi: 10.1038/s41467-024-53469-x.
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Ultrastructure of macromolecular assemblies contributing to bacterial spore resistance revealed by in situ cryo-electron tomography.原位冷冻电子断层成像揭示了有助于细菌孢子抗性的大分子组装体的超微结构。
Nat Commun. 2024 Feb 14;15(1):1376. doi: 10.1038/s41467-024-45770-6.
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Caught in the act: In situ visualization of bacterial secretion systems by cryo-electron tomography.
当场抓获:通过冷冻电镜断层扫描对细菌分泌系统进行原位可视化观察。
Mol Microbiol. 2024 Apr;121(4):636-645. doi: 10.1111/mmi.15186. Epub 2023 Nov 17.
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Reentrant DNA shells tune polyphosphate condensate size.折返式DNA壳调节多聚磷酸盐凝聚物的大小。
bioRxiv. 2023 Sep 15:2023.09.13.557044. doi: 10.1101/2023.09.13.557044.
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Revealing bacterial cell biology using cryo-electron tomography.利用冷冻电镜断层成像技术揭示细菌细胞生物学。
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AreTomo: An integrated software package for automated marker-free, motion-corrected cryo-electron tomographic alignment and reconstruction.AreTomo:一个用于自动无标记、运动校正的冷冻电子断层扫描对齐和重建的集成软件包。
J Struct Biol X. 2022 May 10;6:100068. doi: 10.1016/j.yjsbx.2022.100068. eCollection 2022.
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Plasma membrane protrusions mediate host cell-cell fusion induced by .质膜突起介导 诱导的宿主细胞-细胞融合。
Mol Biol Cell. 2022 Jul 1;33(8):ar70. doi: 10.1091/mbc.E22-02-0056. Epub 2022 May 20.
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Asymmetric localization of the cell division machinery during sporulation.细胞分裂机制在孢子形成过程中的不对称定位。
Elife. 2021 May 21;10:e62204. doi: 10.7554/eLife.62204.
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Activity, delivery, and diversity of Type VI secretion effectors.VI 型分泌系统效应器的活性、传递和多样性。
Mol Microbiol. 2021 Mar;115(3):383-394. doi: 10.1111/mmi.14648. Epub 2020 Dec 7.
10
Preparing samples from whole cells using focused-ion-beam milling for cryo-electron tomography.使用聚焦离子束铣削法从全细胞中制备样品,用于冷冻电子断层扫描。
Nat Protoc. 2020 Jun;15(6):2041-2070. doi: 10.1038/s41596-020-0320-x. Epub 2020 May 13.