Related Experiment Video
Updated: Jun 20, 2026

Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
Published on: June 27, 2014
Time-resolved x-ray solution scattering from detergent solubilized visual rhodopsin
Daniel Sarabi1, Lucija Ostojic1, Xiaolin Xu2
1Department of Chemistry and Molecular Biology, University of Gothenburg, Gothenburg, Sweden.
None:
Time-resolved x-ray solution scattering (TR-XSS) studies provide experimental probes of transient conformational states in macromolecules. Difference x-ray scattering curves from integral membrane proteins are predicted to be influenced by the presence of the surrounding detergent micelle. Here, we present time-dependent x-ray solution scattering data from visual rhodopsin when solubilized in two different detergents: the nonionic surfactant n-dodecyl-β-D-maltoside and the zwitterionic detergent 3-[(3-cholamidopropyl) dimethylammonio]-1-propanesulfonate. Both detergents produce micelles that surround rhodopsin, yet they have different composition, density and critical micelle concentrations and yield different x-ray scattering properties. Our theoretical framework is able to fit the experimental TR-XSS data for photoactivated rhodopsin in both detergents, yielding experimental verification of how x-ray scattering contrast from the detergent molecules influences difference x-ray scattering measurements from integral membrane proteins. These results increase confidence when modeling conformational changes of integral membrane proteins from an ensemble of predicted structures.
More Related Videos
09:19Strategic Screening and Characterization of the Visual GPCR-mini-G Protein Signaling Complex for Successful Crystallization
Published on: March 16, 2020
08:18Author Spotlight: Unraveling Vitamin A Transport Mechanisms — Linking Liver Receptors to Vision Health Through RBPR2 and RBP4 Interactions
Published on: October 4, 2024
Related Concept Videos
UV–Vis Spectrometers
X-ray Diffraction of Biological Samples
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are scattered by the electron clouds around the sample atoms. The X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal crystal...
Mass Spectrum: Interpretation
Determination of Crystal Structures