Related Experiment Video
Updated: Mar 19, 2026

Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels
Published on: July 4, 2016
Nitroxide Spin-Labelling and Its Role in Elucidating Cuproprotein Structure and Function.
Christopher E Jones1, Lawrence J Berliner2
1The School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2759, Australia. c.jones@westernsydney.edu.au.
Electron paramagnetic resonance (EPR) with nitroxide spin-labels helps study copper proteins. This technique reveals cuproprotein structure and function, aiding understanding of copper homeostasis.
Area of Science:
- Biochemistry
- Biophysics
- Bioinorganic Chemistry
Background:
- Copper is an abundant biological metal essential for life.
- Organisms require complex mechanisms to regulate copper homeostasis.
- Dysregulation of copper can lead to deleterious effects.
Purpose of the Study:
- To explore the application of electron paramagnetic resonance (EPR) in studying copper proteins.
- To demonstrate how nitroxide spin-labelling enhances EPR's utility for inorganic biochemists.
- To highlight EPR's potential in understanding copper homeostasis in vivo.
Main Methods:
- Utilizing electron paramagnetic resonance (EPR) spectroscopy.
- Employing nitroxide spin-labels to probe copper(II) sites in proteins.
- Applying EPR imaging for in vivo studies.
Main Results:
- EPR with nitroxide spin-labels provides insights into the coordination environment of Cu(II) sites.
- This technique yields structural information often inaccessible by other methods.
- EPR aids in understanding protein folding and misfolding mechanisms.
Conclusions:
- Nitroxide spin-labelling significantly enhances EPR's capability for studying cuproprotein structure and function.
- EPR is a valuable tool for inorganic biochemists investigating copper-related biological processes.
- EPR imaging shows promise for advancing the understanding of copper homeostasis in living organisms.
More Related Videos
07:24Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins
Published on: September 23, 2021
13:21Detection of Nitric Oxide and Superoxide Radical Anion by Electron Paramagnetic Resonance Spectroscopy from Cells using Spin Traps
Published on: August 18, 2012
Related Concept Videos
NMR Spectroscopy: Spin–Spin Coupling
Nuclear Overhauser Enhancement (NOE)
Protein and Protein Structure
A protein's shape is critical to its function. For example, an enzyme...
Spin–Spin Coupling Constant: Overview
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
Atomic Nuclei: Nuclear Spin
Atomic nuclei have a net nuclear spin, , which can have an integer or half-integer value. In atomic nuclei, the spins of protons are paired against each other but not with neutrons, and vice versa. Consequently, an even number of protons does not contribute to...
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...