Related Experiment Video
Updated: May 17, 2026
09:35
Microcrystallography of Protein Crystals and In Cellulo Diffraction
Published on: July 21, 2017
Merging of image data in electron crystallography
Marcel Arheit1, Daniel Castaño-Diéz, Raphaël Thierry
1C-CINA, Biozentrum, University Basel, Basel, Switzerland.
Methods in Molecular Biology (Clifton, N.J.)
|November 8, 2012
Summary
This study details a 3D merging process for electron crystallography data. It uses the 2dx software system to combine images of 2D crystals for membrane protein structure reconstruction.
Area of Science:
- Structural biology
- Biophysics
Background:
- Electron crystallography is vital for determining membrane protein structures.
- Cryo-transmission electron microscopy (cryo-TEM) captures 2D crystal images and diffraction data.
- Current methods require merging data from single-tilt images for 3D reconstruction.
Purpose of the Study:
- To describe the 3D merging process for electron crystallography data.
- To demonstrate the utility of the 2dx software system for this process.
Main Methods:
- Utilizing cryo-transmission electron microscopy to obtain images and diffraction patterns.
- Processing images of frozen-hydrated 2D crystals using the 2dx/MRC software package.
- Merging processed image data from non-tilted and tilted 2D crystals.
Main Results:
- A described workflow for 3D merging of electron crystallography data.
- Successful application of the 2dx software system for integrating single-tilt images.
Conclusions:
- The 2dx software system provides a method for 3D reconstruction in electron crystallography.
- This approach facilitates the structural analysis of membrane proteins.
Related Concept Videos
01:07Electron Microscope Tomography and Single-particle Reconstruction
Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
01:28Cryo-electron Microscopy
Conventional electron microscopy (EM) involves dehydration, fixation, and staining of biological samples, which distorts the native state of biological molecules and results in several artifacts. Also, the high-energy electron beam damages the sample and makes it difficult to obtain high-resolution images. These issues can be addressed using cryo-EM, which uses frozen samples and gentler electron beams. The technique was developed by Jacques Dubochet, Joachim Frank, and Richard Henderson, for...
02:18X-ray Crystallography
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...