Comparing serial X-ray crystallography and microcrystal electron diffraction (MicroED) as methods for routine...

Area of Science:

• Structural Biology
• Biophysics
• Crystallography

Background:

• Advanced crystallographic methods are crucial for studying biological macromolecules from small crystals.
• Serial X-ray crystallography and microcrystal electron diffraction (MicroED) are emerging techniques for nanoscale crystal analysis.

Purpose of the Study:

• To describe X-ray Free Electron Laser (XFEL) serial crystallography and MicroED experiments.
• To provide a comparative analysis of these methods using microcrystals of cyclophilin A.
• To highlight the impact of sample preparation and delivery on crystal structure.

Main Methods:

• Serial X-ray crystallography experiments using XFEL.
• Microcrystal electron diffraction (MicroED) experiments.
• Utilizing batch-grown microcrystals of the enzyme cyclophilin A.

Main Results:

• Detailed description of experimental setups for XFEL serial crystallography and MicroED.
• Comparison of the strengths and weaknesses of both techniques.
• Analysis of how physical conditions affect the crystal structure of cyclophilin A.

Conclusions:

• These methods offer valuable structural information from microcrystals.
• Understanding method-specific challenges is key for successful implementation.
• Experimental conditions significantly influence the observed crystal structure.