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Related Concept Videos

Protein Networks02:26

Protein Networks

An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
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Applications Of NMR In Biology

Nuclear magnetic resonance (NMR) spectroscopy is a very valuable analytical technique for researchers. It has been used for more than 50 years as an analytical tool. F. Bloch and E. Purcell formulated NMR in 1946 and won the 1952 Nobel Prize in Physics  for their work. Biological macromolecules such as proteins, nucleic acids, lipids, and organic molecules including pharmaceutical compounds, can be studied using this versatile tool that exploits the magnetic properties of certain nuclei.
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2D NMR: Overview of Heteronuclear Correlation Techniques01:18

2D NMR: Overview of Heteronuclear Correlation Techniques

Heteronuclear correlation spectroscopy is an analytical technique that investigates the coupling between different types of nuclei, often a proton and an X-nucleus, such as carbon-13 or nitrogen-15. This method is commonly used in nuclear magnetic resonance (NMR) spectroscopy to gain insights into complex chemical compounds' structural and compositional aspects. A typical heteronuclear correlation spectrum displays X-nucleus chemical shifts on one axis and a proton spectrum on the other axis.
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Related Experiment Video

Updated: May 29, 2026

Measuring Interactions of Globular and Filamentous Proteins by Nuclear Magnetic Resonance Spectroscopy (NMR) and Microscale Thermophoresis (MST)
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Measuring Interactions of Globular and Filamentous Proteins by Nuclear Magnetic Resonance Spectroscopy (NMR) and Microscale Thermophoresis (MST)

Published on: November 2, 2018

An NMR method to study protein-protein interactions.

Noritaka Nishida1, Ichio Shimada

  • 1Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan.

Methods in Molecular Biology (Clifton, N.J.)
|September 13, 2011
PubMed
Summary
This summary is machine-generated.

A new NMR method, cross-saturation (CS), precisely determines protein-protein interaction sites. This technique works for complexes in fast exchange, regardless of size, advancing structural biology.

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Area of Science:

  • Biochemistry and Molecular Biology
  • Structural Biology
  • Biophysics

Background:

  • Protein-protein interactions are crucial for cellular functions, including signaling and gene expression.
  • Understanding these interactions requires precise structural information.
  • Existing methods have limitations in determining binding sites, especially for dynamic complexes.

Purpose of the Study:

  • To introduce and validate a novel Nuclear Magnetic Resonance (NMR) method for identifying protein-protein binding sites.
  • To offer a more precise alternative to conventional NMR techniques for structural analysis of protein complexes.

Main Methods:

  • Development and application of the cross-saturation (CS) NMR technique.
  • Utilizing NMR spectroscopy to monitor changes in protein signals upon complex formation.
  • Analyzing spectral data to pinpoint residues involved in the binding interface.

Main Results:

  • The CS method accurately determines protein-protein binding sites with high precision.
  • This method is effective for protein complexes exhibiting fast exchange dynamics between free and bound states.
  • The technique's applicability is independent of the molecular size of the protein complex.

Conclusions:

  • The cross-saturation (CS) method provides a powerful tool for structural investigation of protein-protein interactions.
  • It overcomes limitations of conventional NMR methods, particularly for dynamic and large complexes.
  • This advancement facilitates a deeper understanding of biological events governed by protein complex formation.