期刊
NATURE CHEMICAL BIOLOGY
卷 5, 期 6, 页码 397-399出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/nchembio.167
关键词
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资金
- Deutsche Forschungsgemeinschaft [Vo 811/4-1]
- C. H. Li Memorial Scholar Award
- NATIONAL EYE INSTITUTE [R01EY012049, R01EY018891] Funding Source: NIH RePORTER
We demonstrate the site-directed incorporation of an IR-active amino acid, p-azido-L-phenylalanine (azidoF, 1), into the G protein-coupled receptor rhodopsin using amber codon suppression technology. The antisymmetric stretch vibration of the azido group absorbs at similar to 2,100 cm(-1) in a clear spectral window and is sensitive to its electrostatic environment. We used FTIR difference spectroscopy to monitor the azido probe and show that the electrostatic environments of specific interhelical networks change during receptor activation.
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