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Microcrystal Electron Diffraction of Small Molecules
Published on: March 15, 2021
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The collection of MicroED data for macromolecular crystallography
Dan Shi1, Brent L Nannenga1, M Jason de la Cruz1
1Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, Virginia, USA.
Nature Protocols
|April 15, 2016
Summary
Microcrystal Electron Diffraction (MicroED) enables structural determination of biological molecules. This method collects electron diffraction data from tiny crystals, overcoming a key challenge in crystallography.
Area of Science:
- Structural Biology
- Biophysics
- Materials Science
Background:
- Crystallography is essential for understanding biological systems.
- Obtaining large, ordered crystals is a significant hurdle in structural biology.
Purpose of the Study:
- To present the Microcrystal Electron Diffraction (MicroED) method for collecting electron diffraction data.
- To enable structural determination of radiation-sensitive biological materials using microcrystals and nanocrystals.
Main Methods:
- Liquid protein microcrystal solutions are deposited on grids and vitrified.
- MicroED data collection uses cryo-electron microscopy with minimal electron exposure and continuous rotation.
- Protocols cover microcrystal identification, sample preparation, and data collection setup.
Main Results:
- MicroED allows data collection from 3D microcrystals and nanocrystals.
- High-resolution structures can be obtained from single or multiple crystals.
- The method is efficient, with data collection for a single dataset taking approximately 10 minutes.
Conclusions:
- MicroED is a valuable technique for overcoming crystallization challenges in structural biology.
- The method facilitates the structural elucidation of previously intractable biological systems.
- This protocol provides a comprehensive guide for implementing MicroED.
