Single-particle electron cryomicroscopy
نویسندگان
چکیده
منابع مشابه
Single particle electron cryomicroscopy: trends, issues and future perspective.
There has been enormous progress during the last few years in the determination of three-dimensional biological structures by single particle electron cryomicroscopy (cryoEM), allowing maps to be obtained with higher resolution and from fewer images than required previously. This is due principally to the introduction of a new type of direct electron detector that has 2- to 3-fold higher detect...
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Electron cryomicroscopy (cryo-EM) yields images of macromolecular assemblies and their components, from which 3D structures can be determined, by using an image processing method commonly known as "single-particle reconstruction." During the past two decades, this technique has become an important tool for 3D structure determination, but it generally has not been possible to determine atomic mo...
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Electron Microscopy is reaching new capabilities thanks to the combined effect of new technologies and new image processing methods. However, the reconstruction process is still complex, requiring many steps and elaborated optimization procedures. Therefore, the possibility to reach a wrong structure exists, justifying the need of robust statistical tests. In this work, we present a conceptuall...
متن کاملOptimal determination of particle orientation, absolute hand, and contrast loss in single-particle electron cryomicroscopy.
A computational procedure is described for assigning the absolute hand of the structure of a protein or assembly determined by single-particle electron microscopy. The procedure requires a pair of micrographs of the same particle field recorded at two tilt angles of a single tilt-axis specimen holder together with the three-dimensional map whose hand is being determined. For orientations determ...
متن کاملProblems in obtaining perfect images by single-particle electron cryomicroscopy of biological structures in amorphous ice.
Theoretical considerations together with simulations of single-particle electron cryomicroscopy images of biological assemblies in ice demonstrate that atomic structures should be obtainable from images of a few thousand asymmetric units, provided the molecular weight of the whole assembly being studied is greater than the minimum needed for accurate position and orientation determination. Howe...
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ژورنال
عنوان ژورنال: Nature Methods
سال: 2013
ISSN: 1548-7091,1548-7105
DOI: 10.1038/nmeth.2779