Correlating ion channel structure and function.
Correlating ion channel structure and function.
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DOI:
10.1016/bs.mie.2021.02.016
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发表时间:
2021
影响因子:
--
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中科院分区:
文献类型:
--
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Recent developments in cryogenic electron microscopy (cryo-EM) led to an exponential increase in high-resolution structures of membrane proteins, and in particular ion channels. However, structures alone can only provide limited information about the workings of these proteins. In order to understand ion channel function and regulation in molecular detail, the obtained structural data need to be correlated to functional states of the same protein. Here, we describe several techniques that can be employed to study ion channel structure and function in vitro and under defined, similar conditions. Lipid nanodiscs provide a native-like environment for membrane proteins and have become a valuable tool in membrane protein structural biology and biophysics. Combined with liposome-based flux assays for the kinetic analysis of ion channel activity as well as electrophysiological recordings, researchers now have access to an array of experimental techniques allowing for detailed structure-function correlations using purified components. Two examples are presented where we put emphasis on the lipid environment and time-resolved techniques together with mutations and protein engineering to interpret structural data obtained from single particle cryo-EM on cyclic nucleotide-gated or Ca2+-gated K+ channels. Furthermore, we provide short protocols for all the assays used in our work so that others can adapt these techniques to their experimental needs. Comprehensive structure-function correlations are essential in order to pharmacologically target channelopathies.
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影响因子:
56.9
作者:
Doyle, DA;Cabral, JM;MacKinnon, R
通讯作者:
MacKinnon, R
影响因子:
1.8
作者:
Ingolfsson, Helgi I.;Andersen, Olaf S.
通讯作者:
Andersen, Olaf S.
DOI:
10.3791/50227
发表时间:
2013-06-21
期刊:
Journal of visualized experiments : JoVE
影响因子:
--
作者:
Collins MD;Gordon SE
通讯作者:
Gordon SE
DOI:
10.1007/978-1-0716-0373-4_17
发表时间:
2020-01-01
期刊:
EXPRESSION, PURIFICATION, AND STRUCTURAL BIOLOGY OF MEMBRANE PROTEINS
影响因子:
--
作者:
Kalienkova, Valeria;Alvadia, Carolina;Paulino, Cristina
通讯作者:
Paulino, Cristina
影响因子:
5.7
作者:
Chen, Bo;Kaledhonkar, Sandip;Frank, Joachim
通讯作者:
Frank, Joachim