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Related Concept Videos

2D NMR: Overview of Homonuclear Correlation Techniques01:16

2D NMR: Overview of Homonuclear Correlation Techniques

173
Homonuclear correlation spectroscopy (COSY) is a powerful technique used in Nuclear Magnetic Resonance (NMR) spectroscopy to study the correlations between nuclei of the same type within a molecule. It provides information about scalar couplings between adjacent nuclei, which helps determine connectivity and structural information. There are several COSY variants, each with its unique strengths and experimental parameters.
COSY90 is the standard two-dimensional (2D) COSY experiment that...
173
2D NMR: Overview of Heteronuclear Correlation Techniques01:18

2D NMR: Overview of Heteronuclear Correlation Techniques

162
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...
162
Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

6.9K
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

191
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
191
Two-Dimensional (2D) NMR: Overview01:12

Two-Dimensional (2D) NMR: Overview

631
The 1D NMR spectrum of large and complex molecules like natural products has complicated splitting patterns and overlapping signals, which can be easily interpreted using 2-dimensional (2D) NMR. Unlike 1D NMR, 2D NMR has two frequency axes that provide the coupling information between the nucleus A and nucleus B in a molecule. The process from which 2D spectra are obtained has four steps.
The first step is the preparation period, during which nucleus A is excited with a radiofrequency pulse....
631
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

1.0K
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...
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Related Experiment Video

Updated: Jun 11, 2025

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
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Homonuclear Super-Resolution NMR Spectroscopy.

Olivia Gampp1, Luca Wenchel1, Peter Güntert1,2,3

  • 1Institute of Molecular Physical Science, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093, Zürich, Switzerland.

Angewandte Chemie (International Ed. in English)
|September 30, 2024
PubMed
Summary
This summary is machine-generated.

Super-resolution spectroscopy significantly reduces signal overlap in nuclear magnetic resonance (NMR) spectra, enabling faster and more accurate analysis of protein structures and dynamics. This advanced technique improves spectral resolution for biomolecular NMR studies.

Keywords:
NMRNOESYlinewidthproteinsuper-resolution

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Area of Science:

  • Biomolecular NMR Spectroscopy
  • Structural Biology
  • Protein Analysis

Background:

  • Homonuclear 1H NMR spectra, like NOESY, suffer from significant signal overlap due to high peak density.
  • Spectral resolution is critical for accurate chemical shift assignment, dynamics, and structure elucidation in biomolecular NMR.
  • Higher magnetic fields improve resolution but do not fully eliminate spectral crowding.

Purpose of the Study:

  • To introduce a super-resolution spectroscopy technique to reduce linewidths in 1H NMR spectra.
  • To demonstrate the application of this method for faster and more accurate analysis of protein structures.
  • To enable automated analysis of unlabeled small and medium-sized proteins.

Main Methods:

  • Super-resolution spectroscopy applied to 1H NMR spectra, including NOESY and TOCSY.
  • Utilizing composite exponential-cosine weighting and window functions in both direct and indirect dimensions.
  • Implementing reduced-acquisition super-resolution (RASR) for time-saving measurements.

Main Results:

  • Achieved a 2-3 fold reduction in cross-peak linewidths per dimension.
  • Demonstrated acquisition of highly resolved NMR spectra for a 20 kDa protein (KRAS) in under 3 hours.
  • Showcased spectra suitable for automated analysis.

Conclusions:

  • Super-resolution spectroscopy effectively enhances spectral resolution in biomolecular NMR.
  • The developed method significantly reduces acquisition time, enabling rapid analysis.
  • This technique paves the way for automated chemical shift assignment, dynamics, and structure determination of proteins within 24 hours.