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Microcrystal Electron Diffraction of Small Molecules
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The cryo-EM method microcrystal electron diffraction (MicroED).

Brent L Nannenga1,2, Tamir Gonen3,4

  • 1Chemical Engineering, School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, AZ, USA. Brent.Nannenga@asu.edu.

Nature Methods
|May 2, 2019
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Summary
This summary is machine-generated.

Microcrystal electron diffraction (MicroED), a cryo-electron microscopy technique, has enabled structure determination for over 40 molecules since 2013. This review details the MicroED method and its applications in structural biology.

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Area of Science:

  • Structural Biology
  • Biophysics
  • Crystallography

Background:

  • Cryo-electron microscopy (cryo-EM) is a powerful tool for determining molecular structures.
  • Microcrystal electron diffraction (MicroED) emerged in 2013 as a novel cryo-EM technique.
  • Advancements in MicroED have expanded its applicability to diverse molecules.

Purpose of the Study:

  • To review the MicroED technique and its development since 2013.
  • To compare MicroED with other established structure-determination methods.
  • To provide practical guidance for researchers interested in utilizing MicroED.

Main Methods:

  • Microcrystal electron diffraction (MicroED) utilizes a focused electron beam to collect diffraction data from tiny protein crystals.
  • Data processing and structure determination pipelines have been refined for MicroED.
  • Cryo-electron microscopy infrastructure is essential for MicroED data acquisition.

Main Results:

  • MicroED has successfully determined the structures of over 40 different proteins, oligopeptides, and organic molecules.
  • The technique has demonstrated its utility for samples that are challenging for traditional X-ray crystallography.
  • Example structures solved by MicroED are presented to illustrate its capabilities.

Conclusions:

  • MicroED is a valuable and increasingly adopted technique for high-resolution structure determination.
  • The continuous refinement of MicroED data collection and analysis enhances its power and accessibility.
  • MicroED offers a complementary approach to existing structural biology methods, broadening the scope of solvable structures.