Identifying proteins in the cell by tagging techniques for cryo-electron microscopy

Area of Science:

• Structural Biology
• Cell Biology
• Biochemistry

Background:

• Cryo-electron microscopy (cryo-EM) is transitioning from molecular to cellular structure analysis.
• Cellular environments are heterogeneous, crowded, and complex, unlike purified samples used in traditional single particle analysis.
• Identifying specific biological molecules within cells is crucial for answering biological questions using cryo-EM.

Purpose of the Study:

• To review the requirements for effective tagging in cryo-EM.
• To highlight recent advancements in tagging and identification methods for cellular cryo-EM.
• To emphasize the critical role of tagging in advancing structural studies of cells.

Main Methods:

• Review of current literature on tagging strategies for cryo-EM.
• Analysis of requirements for successful molecular identification in cellular cryo-EM.
• Discussion of recent technological and methodological developments in tagging and detection.

Main Results:

• Tagging is a critical technique for identifying proteins of interest in heterogeneous cellular cryo-EM samples.
• Specific requirements for tags include stability, visibility, and specificity within the cellular context.
• Recent advances have improved the efficiency and accuracy of tagging and identification methods.

Conclusions:

• Tagging is indispensable for advancing cellular structural biology using cryo-EM.
• Continued development of tagging and identification techniques will enhance the power of cryo-EM for cellular studies.
• This review provides a comprehensive overview of tagging strategies and their importance in the field.