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相关概念视频

Cryo-electron Microscopy01:28

Cryo-electron Microscopy

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Conventional electron microscopy (EM) involves dehydration, fixation, and staining of biological samples, which distorts the native state of biological molecules and results in several artifacts. Also, the high-energy electron beam damages the sample and makes it difficult to obtain high-resolution images. These issues can be addressed using cryo-EM, which uses frozen samples and gentler electron beams. The technique was developed by Jacques Dubochet, Joachim Frank, and Richard Henderson, for...
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Caspases01:24

Caspases

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Caspase, a family of cysteine proteases, serve as effectors in apoptosis. The ced3 gene in C.elegans was first identified to be involved in apoptosis. This gene encodes the ced-3 caspase that is similar to the interleukin-1-beta converting enzyme or ICE in mammals. In addition to apoptosis, caspases also function in the inflammatory response. Inflammatory caspases are essential in activating pro-inflammatory cytokines that recruit immune cells and block the replication of pathogens inside...
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相关实验视频

Updated: Jan 8, 2026

Cryo-EM and Single-Particle Analysis with Scipion
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Cryo-EM and Single-Particle Analysis with Scipion

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在CASP16中进行冷EM分析.

Thomas Mulvaney1,2, Andriy Kryshtafovych3, Maya Topf1,2,4

  • 1Research Department of Integrative Virology, Leibniz Institute of Virology (LIV), Hamburg, Germany.

Proteins
|December 11, 2025
PubMed
概括
此摘要是机器生成的。

电子显微镜 (cryo-EM) 数据显示,局部分辨率与预测中的蛋白质灵活性相关. 这一发现有助于评估原子模型,并确定预测和实验数据之间的差异.

关键词:
卡斯普 (CASP) 是一种结构 RNA 结构 RNA 结构化-EMEM可以使用.灵活性 灵活性 灵活性当地解决方案 地方解决方案蛋白质结构 蛋白质结构结构预测 结构预测

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Exploring Caspase Mutations and Post-Translational Modification by Molecular Modeling Approaches
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相关实验视频

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The CryoAPEX Method for Electron Microscopy Analysis of Membrane Protein Localization Within Ultrastructurally-Preserved Cells
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科学领域:

  • 结构生物学 结构生物学
  • 计算生物学 计算生物学
  • 生物物理学的生物物理.

背景情况:

  • 鼓励实验人员提交冷电子显微镜 (cryo-EM) 数据和原子模型,以便在CASP中进行评估.
  • 在CASP16中,提交了38个冷EM数据集,代表了大多数目标,通常提供单个原子结构.

研究的目的:

  • 研究冷EM重建中的局部分辨率与预测蛋白质结构的灵活性之间的关系.
  • 通过将它们与实验冷电磁数据和局部分辨率信息进行比较来评估CASP预测的准确性.

主要方法:

  • 来自CASP16.16的38个冷EM数据集的分析.
  • 在冷电磁图中的局部分辨率与CASP预测中的残留物根平均平方波动 (RMSF) 之间的相关性分析.
  • 使用SMOC的变体与局部片段对齐对侧链细节的评估.

主要成果:

  • 在冷-EM重建中的局部分辨率与准确的CASP预测中的残留物根平均平方波动 (RMSF) 有良好的相关性.
  • 当地分辨率和pLDDT之间的相关性不太清楚,特别是在移动领域.
  • 对侧链的评估揭示了在高质量的预测中需要改进的领域,并确定了一些目标中的建模差异.

结论:

  • 低温电磁数据中的局部分辨率在预测模型中作为结构灵活性的有价值指标.
  • 实验性冷EM数据对于无模型评估至关重要,它可以进行独特的分析,比如与局部分辨率进行比较.
  • 预测和实验密度之间的差异突出显示了建模需要改进的领域.