Towards high-throughput in situ structural biology using electron cryotomography.

Area of Science:

• Structural Biology
• Cell Biology
• Biophysics

Background:

• Electron cryotomography (cryo-ET) is a powerful technique for visualizing macromolecules within their native cellular environments.
• Sub-tomogram averaging enhances cryo-ET data to achieve high-resolution structures in situ.

Purpose of the Study:

• To review recent advancements addressing limitations in cryo-ET and sub-tomogram averaging.
• To highlight innovations improving throughput and technical challenges in the field.

Main Methods:

• Discusses improvements in sample thinning techniques for cryo-ET.
• Covers enhanced data acquisition speed and strategies for target localization using correlated light and electron microscopy.
• Details advancements in sub-tomogram averaging for higher resolution.

Main Results:

• Recent developments significantly enhance the throughput of cryo-ET sample preparation and data acquisition.
• New strategies improve the accuracy and efficiency of macromolecular localization within cells.
• Advancements in image processing for sub-tomogram averaging lead to higher resolution structures.

Conclusions:

• These innovations are poised to make in situ macromolecular structure determination a routine practice in structural biology.
• The described advances will reduce the time and effort required for cryo-ET and sub-tomogram averaging workflows.