Commentary |
Featured
-
-
News Feature |
The field that came in from the cold
Recent advances in cryo-electron microscopy are enabling researchers to solve protein structures at near-atomic resolutions, expanding the biological applicability of this technique. Michael Eisenstein reports.
- Michael Eisenstein
-
Brief Communication |
EMRinger: side chain–directed model and map validation for 3D cryo-electron microscopy
The fit of atomic models of protein structures to high-resolution cryo-electron microscopy maps can be assessed with a validation tool, EMRinger.
- Benjamin A Barad
- , Nathaniel Echols
- & James S Fraser
-
Article |
Mutational interference mapping experiment (MIME) for studying RNA structure and function
Functionally important residues in a long RNA can be identified by mutational interference mapping experiment (MIME), a method which uses random mutagenesis of RNA followed by selection for function and high-throughput sequencing.
- Redmond P Smyth
- , Laurence Despons
- & Roland Marquet
-
Article |
ProteoPlex: stability optimization of macromolecular complexes by sparse-matrix screening of chemical space
ProteoPlex optimizes buffer conditions for the isolation and purification of macromolecular complexes. The concurrent complex stabilization is beneficial for structure determination using X-ray crystallography or cryo-electron microscopy.
- Ashwin Chari
- , David Haselbach
- & Holger Stark
-
Research Highlights |
Cryo-EM goes high-resolution
The highest-resolution structure solved by cryo-electron microscopy to date reveals what it takes to reach the resolution realm of X-ray crystallography.
- Allison Doerr
-
Brief Communication |
Structural analysis of multicellular organisms with cryo-electron tomography
Tissues from multicellular organisms can be imaged by cryo-electron tomography using an optimized combination of vitrification, milling and application of fiducial markers.
- Jan Harapin
- , Mandy Börmel
- & Ohad Medalia
-
Brief Communication |
De novo protein structure determination from near-atomic-resolution cryo-EM maps
New detector technology has improved the resolution of cryo-electron microscopy (cryo-EM), but tools for structure determination from high-resolution maps have lagged behind. Wang et al. describe a de novo approach for structure determination from high-resolution cryo-EM maps. Also in this issue, DiMaio et al. report structure determination using a homologous structure as a starting model.
- Ray Yu-Ruei Wang
- , Mikhail Kudryashev
- & Frank DiMaio
-
Article |
Atomic-accuracy models from 4.5-Å cryo-electron microscopy data with density-guided iterative local refinement
New detector technology has improved the resolution of cryo-electron microscopy (cryo-EM), but tools for structure determination from high-resolution maps have lagged behind. DiMaio et al. report structure determination from high-resolution cryo-EM maps using a homologous structure as a starting model. Also in this issue, Wang et al. describe a de novo approach for structure determination that does not require a starting model.
- Frank DiMaio
- , Yifan Song
- & David Baker
-
Methods in Brief |
Bacterial ghosts for cryo-electron tomography
-
Research Highlights |
Cryo-EM strikes gold
Gold supports nearly eliminate unwanted specimen motion in cryo-electron microscopy, enabling high-resolution structure determination of challenging proteins.
- Allison Doerr
-
Brief Communication |
High-resolution structure determination by continuous-rotation data collection in MicroED
High-resolution, three-dimensional protein structures can be solved using MicroED, an electron diffraction method that uses three-dimensional microcrystals. An improved MicroED data collection approach described here increases data quality and resolution and extends its broad applicability.
- Brent L Nannenga
- , Dan Shi
- & Tamir Gonen
-
Tools in Brief |
Displaying membrane proteins for cryo-EM
-
Brief Communication |
Controlling protein adsorption on graphene for cryo-EM using low-energy hydrogen plasmas
Graphene is in many ways an ideal sample support for cryo-electron microscopy, but its hydrophobicity prevents adsorption of protein from aqueous solution. Low-energy hydrogen-plasma treatment renders graphene hydrophilic and enables controlled adsorption of protein to its surface.
- Christopher J Russo
- & Lori A Passmore
-
Method to Watch |
Single-particle electron cryomicroscopy
Single-particle electron cryomicroscopy reaches for atomic resolution.
- Allison Doerr
-
Brief Communication |
Quantifying the local resolution of cryo-EM density maps
A method and software tool, ResMap, for quantifying the local resolution across 3D electron cryo-microscopy density maps is reported.
- Alp Kucukelbir
- , Fred J Sigworth
- & Hemant D Tagare
-
Brief Communication |
Engineered nanostructured β-sheet peptides protect membrane proteins
Designed β-strand peptides stabilize integral membrane proteins for biochemical and structural studies, enabling electron microscopy analysis of the dynamic conformations of the ABC transporter MsbA.
- Houchao Tao
- , Sung Chang Lee
- & Qinghai Zhang
-
News & Views |
Stroboscopic imaging of macromolecular complexes
Two reports describing the use of direct-conversion electron detectors and algorithms that correct for beam-induced sample motion in single-particle electron cryomicroscopy demonstrate that this technique can solve structures of macromolecules at near-atomic resolution.
- Robert M. Glaeser
-
Article |
Electron counting and beam-induced motion correction enable near-atomic-resolution single-particle cryo-EM
The combination of a direct electron-detection camera that can count individual electrons and an algorithm for correcting for beam-induced motion in cryo-EM will facilitate determination of three-dimensional structures of smaller, lower-symmetry macromolecular complexes to higher resolution than previously possible.
- Xueming Li
- , Paul Mooney
- & Yifan Cheng
-
Research Highlights |
A genetically encoded probe for EM
Electron microscopy welcomes a versatile genetically encoded protein tag.
- Tal Nawy
-
Correspondence |
Prevention of overfitting in cryo-EM structure determination
- Sjors H W Scheres
- & Shaoxia Chen
-
Tools in Brief |
Metallic electron microscopy
-
Tools in Brief |
Tags to disentangle Dicer
-
Research Highlights |
Etch-a-cell
A milling technique affords researchers a high-resolution glimpse deep into the cell using cryoelectron tomography.
- Allison Doerr
-
Brief Communication |
Blotting protein complexes from native gels to electron microscopy grids
A simple, general procedure for transferring protein complexes directly from native gels to electron microscopy grids for structural analysis is reported.
- Roland Wilhelm Knispel
- , Christine Kofler
- & Stephan Nickell
-
Brief Communication |
Near-infrared branding efficiently correlates light and electron microscopy
Fiducial marks that can be visualized by both light and electron microscopy are generated by 'branding' fixed tissue with a near-infrared laser and will facilitate correlative light and electron microscopy.
- Derron Bishop
- , Ivana Nikić
- & Thomas Misgeld
-
Research Highlights |
The birth of a ribosome
A team of researchers applied a 'discovery single-particle profiling' experimental strategy to visualize the assembly of the ribosome via time-resolved electron microscopy.
- Allison Doerr
-
This Month |
Erik Jorgensen
Fluorescent proteins can be located in electron micrographs.
- Monya Baker
- & Erik Jorgensen
-
Article |
Protein localization in electron micrographs using fluorescence nanoscopy
Methods are reported for the combination of fluorescence nanoscopy using either stimulated emission depletion microscopy (STED) or photoactivated localization microscopy (PALM) with electron microscopy, to achieve correlative imaging in which the super-resolved fluorescence signal is placed in the context of cellular ultrastructure.
- Shigeki Watanabe
- , Annedore Punge
- & Erik M Jorgensen
-
Research Highlights |
Faster, sharper electron microscopy
A technique combining laser and electron pulses is used to achieve nanometer and femtosecond resolution in biological imaging.
- Monya Baker