A method to quantify FRET stoichiometry with phasor plot analysis and acceptor lifetime ingrowth.
A method to quantify FRET stoichiometry with phasor plot analysis and acceptor lifetime ingrowth.
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DOI:
10.1016/j.bpj.2015.01.012
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发表时间:
2015-03-10
影响因子:
3.4
通讯作者:
Kaminski, Clemens F.
中科院分区:
文献类型:
--
作者:
Chen, WeiYue;Avezov, Edward;Schlachter, Simon C.;Gielen, Fabrice;Laine, Romain F.;Harding, Heather P.;Hollfelder, Florian;Ron, David;Kaminski, Clemens F.
FRET is widely used for the study of protein-protein interactions in biological samples. However, it is difficult to quantify both the FRET efficiency (E) and the affinity (Kd) of the molecular interaction from intermolecular FRET signals in samples of unknown stoichiometry. Here, we present a method for the simultaneous quantification of the complete set of interaction parameters, including fractions of bound donors and acceptors, local protein concentrations, and dissociation constants, in each image pixel. The method makes use of fluorescence lifetime information from both donor and acceptor molecules and takes advantage of the linear properties of the phasor plot approach. We demonstrate the capability of our method in vitro in a microfluidic device and also in cells, via the determination of the binding affinity between tagged versions of glutathione and glutathione S-transferase, and via the determination of competitor concentration. The potential of the method is explored with simulations.
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影响因子:
4
作者:
Padilla-Parra, Sergi;Tramier, Marc
通讯作者:
Tramier, Marc
影响因子:
2
作者:
Leray, A.;Spriet, C.;Heliot, L.
通讯作者:
Heliot, L.
影响因子:
2.5
作者:
Hinde, Elizabeth;Digman, Michelle A.;Gratton, Enrico
通讯作者:
Gratton, Enrico
DOI:
10.1039/c3an36798c
发表时间:
2013-04-07
期刊:
The Analyst
影响因子:
--
作者:
Chan FT;Kaminski Schierle GS;Kumita JR;Bertoncini CW;Dobson CM;Kaminski CF
通讯作者:
Kaminski CF
影响因子:
3.5
作者:
Forde, Toni S.;Hanley, Quentin S.
通讯作者:
Hanley, Quentin S.