Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

A new spin on protein dynamics.

Linda Columbus1, Wayne L Hubbell

  • 1Dept Chemistry and Biochemistry, Jules Stein Eye Institute, University of California Los Angeles, Los Angeles, CA 90095, USA.

Trends in Biochemical Sciences
|June 19, 2002
PubMed
Summary

Site-directed spin labeling reveals protein dynamics by analyzing nitroxide sidechain motion. This technique helps map functional domains in complex protein structures.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

The Evolution of Lipids from Solvents to Substrates.

Annual review of biophysics·2025
Same author

Pannexins in the vasculature.

American journal of physiology. Heart and circulatory physiology·2025
Same author

Pannexin channels in the kidney.

American journal of physiology. Renal physiology·2025
Same author

The lipid bilayer strengthens the cooperative network of membrane proteins.

Science advances·2025
Same author

CHARMM-GUI <i>Bicelle Builder</i>: An Extension of <i>Membrane Builder</i> for Modeling and Simulation of Bicelle Systems.

Journal of chemical information and modeling·2025
Same author

US must support chemistry research.

Science (New York, N.Y.)·2025

Area of Science:

  • Biophysics
  • Structural Biology
  • Protein Dynamics

Background:

  • Site-directed spin labeling (SDSL) is a versatile technique for studying protein structure and dynamics.
  • Understanding protein conformational changes is crucial for deciphering biological functions.

Purpose of the Study:

  • To investigate protein backbone dynamics using SDSL.
  • To analyze the contributions of backbone dihedral angles and collective helix motions to sidechain dynamics.
  • To explore the utility of nitroxide scanning for identifying functional domains in proteins.

Main Methods:

  • Utilizing site-directed spin labeling to introduce nitroxide probes into proteins.
  • Performing semi-empirical analysis of nitroxide sidechain dynamics.
  • Correlating identified dynamic sequences with known functional domains.

Main Results:

  • Nitroxide sidechain dynamics reflect contributions from backbone dihedral angle fluctuations and alpha-helix rigid-body motions.
  • Quantitative analysis of sidechain dynamics can be achieved, relating backbone modes to order parameters and rates.
  • Dynamic sequences identified via SDSL correlate with protein functional domains.

Conclusions:

  • SDSL is a powerful tool for exploring protein backbone dynamics and conformational switching.
  • Nitroxide scanning offers an efficient strategy for mapping functional domains in various protein systems, including large complexes and membrane proteins.

Related Experiment Videos