Analysis of conformational changes in rhodopsin by histidine hydrogen-deuterium exchange.
Analysis of conformational changes in rhodopsin by histidine hydrogen-deuterium exchange.
复制标题
通过组氨酸氢-氘交换分析视紫红质的构象变化。
DOI:
10.1007/978-1-4939-2330-4_9
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
Miyagi,Masaru
中科院分区:
文献类型:
--
作者:
Lodowski,DavidT;Miyagi,Masaru
Hydrogen–deuterium exchange (HDX) is a technique that measures the exchange of protein hydrogens for deuteriums in a D2O-containing buffer, providing readout of the structural dynamics. Histidine hydrogen–deuterium exchange mass spectrometry (His-HDX-MS) is a variation of this technique that measures the slow HDX of imidazole C2hydrogens of histidines. This measurement, when accompanied by pH titration, provides both pKas and half-lives (t1/2) of the HDX reaction for individual histidine residues in proteins. The pKaandt1/2values indicate the electrostatic environment and the degree of side-chain solvent accessibility of the histidine residues, respectively. Herein we describe an experimental protocol to characterize rhodopsin by His-HDX-MS. This technique can be used to monitor different states of rhodopsin and might be useful for monitoring longtime scale events in other GPCRs.
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