Spectral decomposition of atomic structures in heterogeneous cryo-EM
Spectral decomposition of atomic structures in heterogeneous cryo-EM
复制标题
异质冷冻电镜中原子结构的光谱分解
DOI:
10.1088/1361-6420/acb2ba
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发表时间:
2023
期刊:
影响因子:
2.1
通讯作者:
Esteve-Yagüe C
中科院分区:
文献类型:
--
作者:
Esteve-Yagüe C
We consider the problem of recovering the three-dimensional atomic structure of a flexible macromolecule from a heterogeneous cryogenic electron microscopy (cryo-EM) dataset. The dataset contains noisy tomographic projections of the electrostatic potential of the macromolecule, taken from different viewing directions, and in the heterogeneous case, each cryo-EM image corresponds to a different conformation of the macromolecule. Under the assumption that the macromolecule can be modelled as a chain, or discrete curve (as it is for instance the case for a protein backbone with a single chain of amino-acids), we introduce a method to estimate the deformation of the atomic model with respect to a given conformation, which is assumed to be known a priori. Our method consists on estimating the torsion and bond angles of the atomic model in each conformation as a linear combination of the eigenfunctions of the Laplace operator in the manifold of conformations. These eigenfunctions can be approximated by means of a well-known technique in manifold learning, based on the construction of a graph Laplacian using the cryo-EM dataset. Finally, we test our approach with synthetic datasets, for which we recover the atomic model of two-dimensional and three-dimensional flexible structures from simulated cryo-EM images.
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影响因子:
64.8
作者:
Jumper J;Evans R;Pritzel A;Green T;Figurnov M;Ronneberger O;Tunyasuvunakool K;Bates R;Žídek A;Potapenko A;Bridgland A;Meyer C;Kohl SAA;Ballard AJ;Cowie A;Romera-Paredes B;Nikolov S;Jain R;Adler J;Back T;Petersen S;Reiman D;Clancy E;Zielinski M;Steinegger M;Pacholska M;Berghammer T;Bodenstein S;Silver D;Vinyals O;Senior AW;Kavukcuoglu K;Kohli P;Hassabis D
通讯作者:
Hassabis D
影响因子:
3
作者:
Sigworth, FJ
通讯作者:
Sigworth, FJ
影响因子:
3
作者:
Tama, F;Miyashita, O;Brooks, CL
通讯作者:
Brooks, CL
DOI:
--
发表时间:
2021
期刊:
影响因子:
--
作者:
P. Kurlberg;Gustav Zickert
通讯作者:
Gustav Zickert
DOI:
10.1109/icip.1998.723308
发表时间:
1998
期刊:
Proceedings 1998 International Conference on Image Processing. ICIP98 (Cat. No.98CB36269)
影响因子:
--
作者:
S. Basu;Y. Bresler
通讯作者:
Y. Bresler