Related Experiment Video
Updated: Mar 28, 2026
09:25
Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments
Published on: November 1, 2024
3.0K
New Views of Functionally Dynamic Proteins by Solution NMR Spectroscopy
1Departments of Molecular Genetics, Biochemistry and Chemistry, The University of Toronto, Toronto, ON, Canada M5S 1A8; Hospital for Sick Children, Program in Molecular Structure and Function, 555 University Avenue, Toronto, ON, Canada M5G 1X8.
Journal of Molecular Biology
|December 29, 2015
Summary
Solution NMR spectroscopy offers detailed insights into protein structure and dynamics. This study highlights its application in analyzing large supramolecular systems and transient protein states, emphasizing the role of molecular dynamics in biomolecular function.
Area of Science:
- Biochemistry
- Biophysics
- Structural Biology
Background:
- Solution Nuclear Magnetic Resonance (NMR) spectroscopy has become a vital tool for investigating protein structure and dynamics.
- Understanding protein dynamics is crucial for elucidating biomolecular function.
Purpose of the Study:
- To summarize key applications of solution NMR spectroscopy.
- To focus on NMR studies of large supramolecular systems and transient protein states.
- To emphasize the importance of molecular dynamics in protein function.
Main Methods:
- Utilizing solution NMR spectroscopy.
- Analyzing supramolecular systems with high aggregate molecular masses (hundreds of kilodaltons).
- Investigating sparsely populated and transiently formed protein states accessible from ground-state conformers.
Main Results:
- Demonstrated the utility of NMR in studying complex supramolecular systems.
- Showcased NMR's capability to characterize transient and sparsely populated protein states.
- Provided insights into the role of molecular dynamics in protein function.
Conclusions:
- Solution NMR spectroscopy is a powerful technique for studying protein structure and dynamics.
- NMR is particularly effective for analyzing large systems and dynamic protein states.
- Molecular dynamics plays a critical role in protein function, and NMR provides essential information on this aspect.
Related Concept Videos
01:15¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR
1.8K
The axial and equatorial protons in cyclohexane can be distinguished by performing a variable-temperature NMR experiment. In this process, except for one proton, the remaining eleven protons are replaced by deuterium. The deuterium substitution avoids the possible peak splitting caused by the spin-spin coupling between the adjacent protons. The remaining proton flips between the axial and equatorial positions.
1.8K
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
1.7K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.7K
01:25Applications Of NMR In Biology
4.7K
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.
4.7K
00:52¹H NMR of Conformationally Flexible Molecules: Temporal Resolution
1.4K
At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...
1.4K
01:19Protein Dynamics in Living Cells
2.8K
Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
2.8K
01:19NMR Spectroscopy Of Amines
11.7K
In proton NMR spectroscopy, primary amines and secondary amines showcase their N–H protons as a broad signal in the chemical shift range between δ 0.5 and 5 ppm. The exact position in this range depends on several factors, including sample concentration, hydrogen bonding, and the type of solvent used. Since amine protons undergo fast proton exchange in solution, the protons are labile and therefore do not participate in any splitting with adjacent protons. Thus, the observed peak is...
11.7K