EMD-6802
Near-atomic resolution reconstruction of mixed over-/under-focused apoferritin
EMD-6802
Single-particle3.0 Å
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Map released: 22/11/2017
Last modified: 05/08/2020
Sample Organism:
Homo sapiens
Sample: Near-atomic resolution reconstruction of over-focused apoferritin
Raw data: EMPIAR-10122
Deposition Authors: Fan X, Zhao LY
Sample: Near-atomic resolution reconstruction of over-focused apoferritin
Raw data: EMPIAR-10122
Deposition Authors: Fan X, Zhao LY
Near-Atomic Resolution Structure Determination in Over-Focus with Volta Phase Plate by Cs-Corrected Cryo-EM
Fan X,
Zhao L,
Liu C
,
Zhang JC
,
Fan K,
Yan X,
Peng HL
,
Lei J,
Wang HW
(2017) Structure , 25 , 1623 - 1630.e3
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(2017) Structure , 25 , 1623 - 1630.e3
Abstract:
Volta phase plate (VPP) is a recently developed transmission electron microscope (TEM) apparatus that can significantly enhance the image contrast of biological samples in cryoelectron microscopy, and therefore provide the possibility to solve structures of relatively small macromolecules at high-resolution. In this work, we performed theoretical analysis and found that using phase plate on objective lens spherical aberration (Cs)-corrected TEM may gain some interesting optical properties, including the over-focus imaging of macromolecules. We subsequently evaluated the imaging strategy of frozen-hydrated apo-ferritin with VPP on a Cs-corrected TEM and obtained the structure of apo-ferritin at near-atomic resolution from both under- and over-focused dataset, illustrating the feasibility and new potential of combining VPP with Cs-corrected TEM for high-resolution cryo-EM.
Volta phase plate (VPP) is a recently developed transmission electron microscope (TEM) apparatus that can significantly enhance the image contrast of biological samples in cryoelectron microscopy, and therefore provide the possibility to solve structures of relatively small macromolecules at high-resolution. In this work, we performed theoretical analysis and found that using phase plate on objective lens spherical aberration (Cs)-corrected TEM may gain some interesting optical properties, including the over-focus imaging of macromolecules. We subsequently evaluated the imaging strategy of frozen-hydrated apo-ferritin with VPP on a Cs-corrected TEM and obtained the structure of apo-ferritin at near-atomic resolution from both under- and over-focused dataset, illustrating the feasibility and new potential of combining VPP with Cs-corrected TEM for high-resolution cryo-EM.