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Automated sample-changing robot for solution scattering experiments at the EMBL Hamburg SAXS station X33.

A R Round1, D Franke1, S Moritz2

  • 1EMBL Hamburg, Building 25a, Notkestrasse 85, 22603 Hamburg, Germany.

Journal of Applied Crystallography
|December 9, 2014
PubMed
Summary

An automated sample changer for solution small-angle X-ray scattering (SAXS) experiments increases throughput and reliability. This system, suitable for synchrotron, laboratory, and neutron sources, enhances user experience for biological macromolecule studies.

Keywords:
automationbiological macromoleculeshigh throughputsmall-angle X-ray scattering (SAXS)solution

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Area of Science:

  • Biophysics
  • Structural Biology
  • Biochemistry

Background:

  • Synchrotron small-angle X-ray scattering (SAXS) is increasingly used for large-scale biological macromolecule studies.
  • Automation is crucial for efficient high-throughput SAXS experiments.

Purpose of the Study:

  • To develop and evaluate an automated sample changer for solution SAXS.
  • To improve the efficiency, reliability, and user-friendliness of SAXS experiments.

Main Methods:

  • A prototype automated sample changer was developed, utilizing thermostatically controlled well plates for up to 192 samples.
  • The protocol included automated loading of protein solutions and buffers, with in-situ cell cleaning and drying.
  • The system was tested at the X33 beamline (EMBL, DESY) and controlled via a client-server network protocol.

Main Results:

  • The automated system achieved a throughput of approximately 12 samples per hour with a sample loading failure rate below 0.5%.
  • User feedback indicated significant improvements in ease of use and reliability compared to manual methods.
  • The system demonstrated successful operation for over 50 external user groups.

Conclusions:

  • The automated sample changer significantly enhances the efficiency and reliability of solution SAXS experiments.
  • The developed system is adaptable for various sources, including synchrotron, laboratory, and neutron sources.
  • Further integration with beamline control software is underway for fully automated data collection.