Related Experiment Video
Updated: Apr 3, 2026
13:59
Methods to Identify the NMR Resonances of the 13C-Dimethyl N-terminal Amine on Reductively Methylated Proteins
Published on: December 12, 2013
6.7K
Methyl groups as NMR probes for biomolecular interactions
Silke Wiesner1, Remco Sprangers2
1Research group 'Mechanisms of Ubiquitin-dependent Cell Signaling', Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany.
Current Opinion in Structural Biology
|September 26, 2015
Summary
Novel NMR techniques, specifically methyl transverse relaxation optimized spectroscopy (TROSY), offer unique insights into how large biomolecular complexes assemble, move, and are regulated. These methods are crucial for understanding complex biological functions.
Area of Science:
- Biochemistry
- Structural Biology
- Biophysics
Background:
- Intermolecular interactions are fundamental to all biological processes.
- Understanding the dynamics and regulation of biomolecular complexes is key to deciphering biological function.
- Traditional methods face challenges in studying large, asymmetric complexes.
Purpose of the Study:
- To highlight the utility of novel Nuclear Magnetic Resonance (NMR) techniques for studying biomolecular complexes.
- To showcase applications leveraging the methyl transverse relaxation optimized spectroscopy (TROSY) effect.
- To illustrate the synergy between methodological advancements and biological discoveries in this field.
Main Methods:
- Utilizing methyl transverse relaxation optimized spectroscopy (TROSY) NMR.
- Applying advanced NMR techniques to investigate intermolecular interactions.
- Analyzing the assembly, dynamics, and regulation of biomolecular complexes.
Main Results:
- Methodological advancements in NMR, particularly methyl TROSY, provide unique insights into biomolecular complexes.
- These techniques enable the study of dynamics and regulation in complex systems.
- Successful application demonstrates the power of methyl TROSY for biological investigations.
Conclusions:
- Methyl TROSY NMR is a powerful tool for elucidating intermolecular interactions in biological systems.
- Future applications of methyl TROSY will continue to yield critical information on large, asymmetric eukaryotic protein complexes.
- The integration of advanced NMR methods drives progress in understanding complex biological machinery.
Related Concept Videos
01:07Proton (¹H) NMR: Chemical Shift
4.2K
Organic molecules primarily contain carbon and hydrogen atoms. While all the hydrogen isotopes are NMR-active, protium or hydrogen-1 is the most abundant. It has a significant energy separation between its nuclear spin states due to its large gyromagnetic ratio. As per Boltzmann's distribution, an increase in the energy separation implies a greater excess population of nuclei available for excitation, resulting in a strong NMR absorption signal.
Absorption signals of all the protium nuclei...
Absorption signals of all the protium nuclei...
4.2K
01:13¹H NMR: Complex Splitting
2.2K
A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
2.2K
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
01:17Chemical Shift: Internal References and Solvent Effects
1.6K
In an NMR sample, precise measurement of the absolute absorption frequencies of nuclei is difficult. A standard internal reference compound is added, and the frequency difference between the reference signal and sample signals is measured.
The internal reference compound generally used in NMR spectroscopy is tetramethylsilane (TMS). TMS is preferred because it is chemically inert, soluble in NMR solvents, and easily removable. Also, the highly shielded methyl protons in TMS yield an intense...
The internal reference compound generally used in NMR spectroscopy is tetramethylsilane (TMS). TMS is preferred because it is chemically inert, soluble in NMR solvents, and easily removable. Also, the highly shielded methyl protons in TMS yield an intense...
1.6K
01:10¹H NMR of Labile Protons: Temporal Resolution
1.8K
Protons bonded to heteroatoms such as nitrogen and oxygen exhibit a range of chemical shift values. This is due to the varying degree of hydrogen bonding between the proton and the heteroatom in other molecules. The extent of hydrogen bonding affects the electron density around the proton, thereby giving different chemical shift values for the protons in the proton NMR spectrum.
The –OH proton in alcohols typically appears in the range of δ 2 to 5 ppm but can vary depending on the specific...
The –OH proton in alcohols typically appears in the range of δ 2 to 5 ppm but can vary depending on the specific...
1.8K
00:58¹H NMR Signal Integration: Overview
4.2K
The intensity of a signal, which can be represented by the area under the peak, depends on the number of protons contributing to that signal. The area under each peak is shown as a vertical line called an integral, with the integral value listed under it, as seen in the proton NMR spectrum of benzyl acetate. Each integral value is divided by the smallest integral value to obtain the ratio of the number of protons producing each signal. The ratio reveals the relative number of protons and not...
4.2K