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High-resolution macromolecular structure determination using CCD detectors and synchrotron radiation

R L Walter1, D J Thiel, S L Barna

  • 1Section of Biochemistry, Cell and Molecular Biology, Cornell University, Ithaca, NY 14853, USA.

Structure (London, England : 1993)
|August 15, 1995
PubMed
Summary

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Charge-coupled device (CCD) X-ray detectors improve macromolecular crystallography by enabling faster, more accurate data collection. This new technology enhances high-resolution structural studies, especially with weak X-ray signals from synchrotron sources.

Area of Science:

  • Crystallography
  • Structural Biology
  • X-ray Diffraction

Background:

  • Synchrotron radiation sources are vital for macromolecular crystallography.
  • Development of advanced X-ray detectors has lagged, limiting efficient use of these sources.
  • Charge-coupled devices (CCDs) offer potential for faster, more accurate, and automated data collection.

Purpose of the Study:

  • To introduce and evaluate a CCD-based X-ray detector for macromolecular crystallography.
  • To demonstrate the practical utility and capabilities of this new detector system.

Main Methods:

  • Development and implementation of a CCD-based X-ray detector.
  • Operation of the detector at the Cornell High Energy Synchrotron Source.
  • Application to various crystallographic projects, including high-resolution studies.

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Main Results:

  • The CCD detector has been operational for over 1.5 years.
  • It has been successfully used for diverse crystallographic projects and high-resolution structural studies.
  • The system demonstrates excellent statistical data quality, ease of use, and efficiency.

Conclusions:

  • The CCD detector significantly enhances diffraction pattern measurement for macromolecules, particularly at high resolution with weak X-ray intensities.
  • Its utility is shown across applications from virus crystallography to small-molecule structure determination.
  • CCD detectors combined with synchrotron radiation offer substantial potential for advancing structural studies.