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Related Concept Videos

Determination of Crystal Structures01:29

Determination of Crystal Structures

126
In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
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X-ray Diffraction of Biological Samples01:10

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X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are  scattered by the electron clouds around the sample atoms. The  X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...
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X-ray Crystallography02:18

X-ray Crystallography

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The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
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Application of in situ diffraction in high-throughput structure determination platforms.

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Macromolecular crystallography (MX) advances enable rapid structure determination. New in situ X-ray diffraction methods offer efficient data collection directly from crystallization experiments at synchrotron facilities.

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Area of Science:

  • Structural Biology
  • Biophysics
  • Biochemistry

Background:

  • Macromolecular crystallography (MX) is a key technique for atomic-level visualization of cellular machinery.
  • Structural genomics initiatives have driven significant progress in macromolecular structure determination.
  • Third-generation synchrotron sources and automation have accelerated annual structure determination rates.

Purpose of the Study:

  • To provide an overview of the emerging use of in situ X-ray diffraction data collection.
  • To guide users on implementing in situ experiments at synchrotron MX beamlines.
  • To highlight the efficiency of collecting data directly from crystallization experiments.

Main Methods:

  • Utilizing synchrotron radiation sources for X-ray diffraction.
  • Implementing automated data acquisition and analysis workflows.
  • Performing in situ X-ray diffraction on crystallization experiments.

Main Results:

  • In situ experiments are now routinely available at several synchrotron MX beamlines.
  • Advanced tools facilitate rapid sample evaluation and data collection.
  • Structure solution can be achieved in near real-time under favorable conditions.

Conclusions:

  • In situ X-ray diffraction represents an emerging and efficient method for macromolecular structure determination.
  • The availability of these methods at synchrotron facilities enhances structural biology research.
  • Practical implementation guides are crucial for user adoption and success.