Entropy-regularized deconvolution of cellular cryotransmission electron tomograms.

Entropy-regularized deconvolution of cellular cryotransmission electron tomograms.
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DOI:
10.1073/pnas.2108738118
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发表时间:
2021-12-14
影响因子:
11.1
通讯作者:
Sedat J
Sedat J
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Croxford M;Elbaum M;Arigovindan M;Kam Z;Agard D;Villa E;Sedat J

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Cellular cryo-electron tomography suffers from severely compromised Z resolution due to the missing wedges of information not collected during the acquisition of tilt series. This paper shows that application of entropy-regularized deconvolution to transmission electron tomography substantially fills in this missing information, allowing for improved Z resolution and better interpretation of cellular structures. Cryo-electron tomography (cryo-ET) allows for the high-resolution visualization of biological macromolecules. However, the technique is limited by a low signal-to-noise ratio (SNR) and variance in contrast at different frequencies, as well as reduced Z resolution. Here, we applied entropy-regularized deconvolution (ER-DC) to cryo-ET data generated from transmission electron microscopy (TEM) and reconstructed using weighted back projection (WBP). We applied deconvolution to several in situ cryo-ET datasets and assessed the results by Fourier analysis and subtomogram analysis (STA).
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