کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5914092 1162720 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Maximizing the potential of electron cryomicroscopy data collected using direct detectors
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شناسی مولکولی
پیش نمایش صفحه اول مقاله
Maximizing the potential of electron cryomicroscopy data collected using direct detectors
چکیده انگلیسی
Single-particle electron cryomicroscopy is undergoing a technical revolution due to the recent developments of direct detectors. These new recording devices detect electrons directly (i.e. without conversion into light) and feature significantly improved detective quantum efficiencies and readout rates as compared to photographic films or CCDs. We evaluated here the potential of one such detector (Gatan K2 Summit) to enable the achievement of near-atomic resolution reconstructions of biological specimens when coupled to a widely used, mid-range transmission electron microscope (FEI TF20 Twin). Compensating for beam-induced motion and stage drift provided a 4.4 Å resolution map of Sulfolobus turreted icosahedral virus (STIV), which we used as a test particle in this study. Several motion correction and dose fractionation procedures were explored and we describe their influence on the resolution of the final reconstruction. We also compared the quality of this data to that collected with a FEI Titan Krios microscope equipped with a Falcon I direct detector, which provides a benchmark for data collected using a high-end electron microscope.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Structural Biology - Volume 184, Issue 2, November 2013, Pages 193-202
نویسندگان
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