Label-free quantification of membrane-ligand interactions using backscattering interferometry.
Label-free quantification of membrane-ligand interactions using backscattering interferometry.
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DOI:
10.1038/nbt.1790
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发表时间:
2011-04
影响因子:
46.9
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中科院分区:
文献类型:
--
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Though membrane-associated proteins are ubiquitous within all living organisms and represent the majority of drug targets, a general method for direct, label-free measurement of ligand binding to native membranes has not been reported. Here we show backscattering interferometry (BSI) to be a viable technique for quantifying ligand-receptor binding affinities in a variety of membrane environments. By detecting minute changes in the refractive index of a solution, BSI allows binding interactions of proteins with their ligands to be measured at picomolar concentrations. Equilibrium binding constants in the micromolar to picomolar range were obtained for small- and large-molecule interactions in both synthetic- and cell-derived membranes without the use of labels or supporting substrates. The simple and low-cost hardware, high sensitivity, and label-free nature of BSI should make it readily applicable to the study of many membrane-associated proteins of biochemical and pharmacological interest.
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影响因子:
15
作者:
Mileni, Mauro;Garfunkle, Joie;DeMartino, Jessica K.;Cravatt, Benjamin F.;Boger, Dale L.;Stevens, Raymond C.
通讯作者:
Stevens, Raymond C.
影响因子:
7.4
作者:
Kussrow, Amanda;Kaltgrad, Eiton;Bornhop, Darryl J.
通讯作者:
Bornhop, Darryl J.
影响因子:
7.4
作者:
Latham, Joey C.;Stein, Richard A.;Mchaourab, Hassane S.
通讯作者:
Mchaourab, Hassane S.
影响因子:
7.3
作者:
Romero, F. Anthony;Du, Wu;Boger, Dale L.
通讯作者:
Boger, Dale L.
影响因子:
64.8
作者:
Kaupmann, K;Huggel, K;Bettler, B
通讯作者:
Bettler, B