Journal
FEBS LETTERS
Volume 587, Issue 20, Pages 3309-3313Publisher
WILEY
DOI: 10.1016/j.febslet.2013.08.043
Keywords
Optogenetic; Rhodopsin; Light-activated cation channel; Photocycle; Membrane protein; EPR spectroscopy
Funding
- Deutsche Forschungsgemeinschaft [SFB 1078]
Ask authors/readers for more resources
Channelrhodopsin is a cation channel with the unique property of being activated by light. To address structural changes of the open state of the channel, two variants, which contain either 1 or 2 wild-type cysteines, were derivatised with nitroxide spin label and subjected to electron paramagnetic resonance spectroscopy. Both variants contained the C128T mutation to trap the long-lived P-3(520) state by illumination. Comparison of spin-spin distances in the dark state and after illumination reflect conformational changes in the conductive P-3(520) state involving helices B and F. Spin distance measurements reveal that channelrhodopsin forms a dimer even in the absence of intermolecular N-terminal cysteines. Structured summary of protein interactions: ChR2 and ChR2bind by electron resonance (View interaction) (C) 2013 Federation of European Biochemical Societies. Published by Elsevier B. V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available