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Related Experiment Videos

Hydroxyethyl cellulose matrix applied to serial crystallography.

Michihiro Sugahara1, Takanori Nakane2, Tetsuya Masuda3,4

  • 1RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5148, Japan. msuga@spring8.or.jp.

Scientific Reports
|April 8, 2017
PubMed

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Summary

A new hydroxyethyl cellulose matrix enables serial femtosecond crystallography (SFX) for protein structure determination. This method uses minimal sample and allows room-temperature analysis with reduced radiation damage.

Area of Science:

  • Biochemistry
  • Structural Biology
  • Crystallography

Background:

  • Serial femtosecond crystallography (SFX) offers room-temperature protein structure determination with minimal radiation damage.
  • Current crystal carrier matrices for SFX are limited in versatility and reliability for diverse protein samples.
  • Efficient sample delivery is crucial for SFX, requiring low sample consumption (<1 mg) and low flow rates.

Purpose of the Study:

  • To develop and validate a novel, versatile carrier matrix for SFX.
  • To demonstrate the efficacy of the new matrix for determining protein structures.
  • To showcase de novo structure determination using the developed method.

Main Methods:

  • Development of a hydroxyethyl cellulose-based matrix for serial sample loading in SFX.

Related Experiment Videos

  • Application of the matrix to three different protein samples for structural analysis.
  • De novo structure determination of proteinase K using single-wavelength anomalous diffraction (SAD) with a praseodymium atom signal.

    • Main Results:

    • Successful determination of structures for three proteins using the hydroxyethyl cellulose matrix.
    • Demonstration of de novo structure determination of proteinase K from approximately 3,000 diffraction images.
    • Validation of the matrix's capability for efficient, low-sample-consumption SFX.

    Conclusions:

    • The hydroxyethyl cellulose matrix is a reliable and versatile carrier for SFX.
    • This method facilitates room-temperature protein structure determination with minimal sample and radiation damage.
    • The developed approach advances the application of SFX for structural biology research.