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Updated: Jan 9, 2026

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EMProt 改进了从冷电磁图的结构确定

Tao Li¹, Ji Chen¹, Hao Li¹

¹School of Physics and Key Laboratory of Molecular Biophysics of MOE, Huazhong University of Science and Technology, Wuhan, China.

Nature structural & molecular biology

|December 8, 2025

概括

我们开发了EMProt,这是一种自动化方法,用于从冷电子显微镜 (cryo-EM) 地图中确定蛋白质结构. EMProt精确地建模了蛋白质结构,在映射到模型的准确性和完整性方面超过了现有的方法.

科学领域:

结构生物学是结构生物学.
生物物理学的生物物理.
计算生物学是一种计算生物学.

背景情况:

电子显微镜 (cryo-EM) 是确定宏分子结构的领先技术.
精确的全原子蛋白质结构建模从冷-EM地图是具有挑战性的,因为分辨率异质.

研究的目的:

现在要介绍EMProt,这是一种完全自动化的方法,可以从冷EM数据中精确地确定蛋白质结构.
为了解决现有方法在处理冷电磁图中的分辨率变化方面的局限性.

主要方法:

EMProt将冷EM地图信息与使用三轨注意力网络的结构预测集成在一起.
该方法在177个具有不同分辨率 (<4 Å) 和复杂度 (高达54个链) 的实验冷电磁图上进行了评估.

主要成果:

在结构恢复和完整性方面,EMProt显著优于AlphaFold3,DeepMainmast和ModelAngelo等最先进的方法.
由EMProt生成的模型在适配冷电磁图表方面具有很高的准确性,并通过严格的结构验证检查.

结论:

EMProt提供了一种强大的自动化解决方案,用于从冷-EM地图中准确确定蛋白质结构.
这一进步对于结构生物学和药物发现至关重要,使实验数据的结构模型更可靠.

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Cryo-electron Microscopy

Cryo-electron Microscopy

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...

Electron Microscope Tomography and Single-particle Reconstruction

Electron Microscope Tomography and Single-particle Reconstruction

Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...