Cohomology of Cryo-Electron Microscopy

Cohomology of Cryo-Electron Microscopy
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冷冻电子显微镜的上同调

DOI:
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发表时间:
2016
影响因子:
1.2
通讯作者:
Lek
Lek
中科院分区:
数学2区
文献类型:
--
作者:
Ke Ye;Lek

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低温电子显微镜(EM)的目标是从其二维投影图像的集合中重建分子的三维结构。在本文中,我们证明了冷冻电镜的基本前提——将二维投影拼接在一起以重建三维物体——自然是与SO(2)-系数的切赫上同调之一。我们推导出每个低温电镜重构问题对应于一个简单复合体上的有向圆束,从而使我们能够通过主束对低温电镜问题进行分类。在实际应用中,二维图像是有噪声的,低温电镜的主要任务是去噪。我们将看到如何使用上述见解来实现这一目标。
The goal of cryo-electron microscopy (EM) is to reconstruct the 3-dimensional structure of a molecule from a collection of its 2-dimensional projected images. In this article, we show that the basic premise of cryo-EM --- patching together 2-dimensional projections to reconstruct a 3-dimensional object --- is naturally one of Cech cohomology with SO(2)-coefficients. We deduce that every cryo-EM reconstruction problem corresponds to an oriented circle bundle on a simplicial complex, allowing us to classify cryo-EM problems via principal bundles. In practice, the 2-dimensional images are noisy and a main task in cryo-EM is to denoise them. We will see how the aforementioned insights can be used towards this end.
DOI: 10.1016/j.acha.2010.02.001
发表时间: 2011-01-30
影响因子: 2.5
作者:
Singer, A.
通讯作者: Singer, A.
DOI: 10.1016/0304-3991(94)90003-5
发表时间: 1994-02-01
期刊: ULTRAMICROSCOPY
影响因子: 2.2
作者:
RADERMACHER, M
通讯作者: RADERMACHER, M
DOI: 10.1016/0304-3991(92)90233-a
发表时间: 1992-01-01
期刊: ULTRAMICROSCOPY
影响因子: 2.2
作者:
PENCZEK, P;RADERMACHER, M;FRANK, J
通讯作者: FRANK, J