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On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature
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Pinpointing Protein Crystal Structures over a Broad Temperature Range Using Hydrophobic Protection.

Fernando de Sá Ribeiro1, Luís Maurício T R Lima1

  • 1Laboratório de Biotecnologia Farmacêutica (pbiotech), Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil.

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|June 15, 2026
PubMed
Summary
This summary is machine-generated.

Researchers identified a novel hydrophobic grease cryoprotectant for protein crystallography. This grease enables X-ray diffraction data collection from cryogenic to room temperatures, preserving diffraction power and crystal integrity.

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Last Updated: Jun 16, 2026

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X-Ray Crystallography to Study the Oligomeric State Transition of the Thermotoga maritima M42 Aminopeptidase TmPep1050
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Combining Wet and Dry Lab Techniques to Guide the Crystallization of Large Coiled-coil Containing Proteins

Published on: January 6, 2017

Area of Science:

  • Structural Biology
  • Biophysics
  • Crystallography

Background:

  • Protein interactions are crucial biological processes influenced by environmental variables.
  • Temperature significantly impacts biological systems, but its study in protein crystallography is limited by reduced diffraction power at varying temperatures.
  • Optimizing cryoprotection is essential for maintaining sample integrity and diffraction quality.

Purpose of the Study:

  • To identify a cryoprotectant enabling X-ray diffraction data collection across a wide temperature range (100 K to 300 K).
  • To evaluate the efficacy of hydrophobic materials as cryoprotectants for protein crystals.
  • To assess the impact of temperature and exposure time on diffraction data quality.

Main Methods:

  • Screening of various hydrophobic materials as cryoprotectants.
  • X-ray diffraction data collection at temperatures ranging from cryogenic (100 K) to room temperature (300 K).
  • Analysis of diffraction data quality, exposure time effects, and temperature-dependent B-factors.

Main Results:

  • Identification of specific hydrophobic greases effective for cryoprotection at both cryogenic and room temperatures.
  • Successful X-ray diffraction data collection at atomic resolution using home-source and synchrotron radiation.
  • No significant effect of exposure time (70 ms to 1 s) on data quality, but an exponential temperature dependence of the overall B-factor was observed.

Conclusions:

  • Hydrophobic grease serves as an effective cryoprotectant, safeguarding protein crystals against temperature fluctuations and dehydration.
  • This cryoprotectant facilitates optimized X-ray diffraction data collection across an unprecedented temperature range.
  • The findings advance the ability to study dynamic protein structures under near-physiological conditions.