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Related Experiment Videos

Atomic refinement using orientational restraints from solid-state NMR.

R Bertram1, J R Quine, M S Chapman

  • 1Institute of Molecular Biophysics, Florida State University, Tallahassee, Florida, 32306, USA.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|October 24, 2000
PubMed
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This study presents a faster method for refining molecular structures using solid-state Nuclear Magnetic Resonance (NMR) orientational data. The new software module improves atomic refinement efficiency, aiding protein structure determination.

Area of Science:

  • Structural Biology
  • Biophysics
  • Computational Chemistry

Background:

  • Solid-state Nuclear Magnetic Resonance (NMR) provides valuable orientational restraints for molecular structure determination.
  • Integrating these restraints into atomic refinement has been computationally intensive, posing a challenge for structure determination.

Purpose of the Study:

  • To develop a computationally efficient procedure for atomic refinement of molecular structures using solid-state NMR orientational restraints.
  • To integrate this procedure into a widely used refinement package for broader accessibility.

Main Methods:

  • A novel energy function was formulated, penalizing deviations from ideal stereochemistry and incorporating orientational data restraints.
  • The refinement process utilizes least-squares minimization and/or molecular dynamics with simulated annealing.

Related Experiment Videos

  • A new software module was developed for the Crystallography & NMR System (CNS) refinement package.

    • Main Results:

    • The developed procedure significantly accelerates the refinement process, being orders of magnitude faster than previous methods.
    • The software effectively refines molecular structures while maintaining good stereochemical quality.
    • Reduced computation time addresses a key bottleneck in protein structure determination using solid-state NMR.

    Conclusions:

    • The new method provides a highly efficient approach for atomic refinement incorporating solid-state NMR orientational data.
    • This advancement facilitates and accelerates the determination of molecular structures, particularly for proteins.
    • The software's speed and integration with CNS enhance its utility for structural biologists.