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Related Experiment Video

Updated: Sep 2, 2025

Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography
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Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography

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Data collection from crystals grown in microfluidic droplets.

Gyorgy Babnigg1, Darren Sherrell2, Youngchang Kim2

  • 1Biosciences Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA.

Acta Crystallographica. Section D, Structural Biology
|August 2, 2022
PubMed
Summary
This summary is machine-generated.

Protein microcrystals grown in droplets offer efficient sample use and high-quality data collection. This method simplifies storage, transport, and X-ray crystallography data collection, even after international shipping.

Keywords:
X-ray data collectionemulsionsfixed targetsfucosidaseshydrolaseslow dosemicrofluidic dropletsserial crystallographysialate O-acetylesteraseα–β fold

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Area of Science:

  • Structural Biology
  • Crystallography
  • Microfluidics

Background:

  • Protein crystals are crucial for structural determination via X-ray crystallography.
  • Microfluidic droplet technology offers advantages in sample handling and crystallization.
  • Challenges remain in sample delivery and data collection with microfluidic protein crystals.

Purpose of the Study:

  • To develop and demonstrate an efficient method for growing, storing, and collecting data from protein crystals in microfluidic droplets.
  • To present a robust sample-transport and data-collection strategy for serial crystallography.
  • To overcome challenges associated with microfluidic droplet delivery into X-ray beams.

Main Methods:

  • Crystallization of human gut microbial hydrolases in nanolitre-sized microfluidic droplets.
  • Development of a sample-transport system using emulsions of droplets.
  • Utilizing a silicon fixed-target serial device for X-ray beam delivery.
  • Performing both local and remote data collection.

Main Results:

  • Successful crystallization of proteins in 50-500 picolitre droplets.
  • Demonstrated feasibility of shipping microfluidic protein crystals internationally (US to UK).
  • Crystals stored for three months at 4°C maintained good diffraction quality with minimal loss.

Conclusions:

  • Microfluidic droplet crystallization is a viable and robust method for protein sample preparation.
  • The described approach is cost-effective, convenient, and requires minimal protein.
  • This strategy facilitates sample storage, transport, and serial X-ray crystallography data collection, even with delayed beamtime.