FTIR analysis of GPCR activation using azido probes.
FTIR analysis of GPCR activation using azido probes.
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DOI:
10.1038/nchembio.167
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发表时间:
2009-06
影响因子:
14.8
通讯作者:
Sakmar TP
中科院分区:
文献类型:
--
作者:
Ye S;Huber T;Vogel R;Sakmar TP
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 ~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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