Label-free measuring and mapping of binding kinetics of membrane proteins in single living cells.
Label-free measuring and mapping of binding kinetics of membrane proteins in single living cells.
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Membrane proteins (MPs) mediate a variety of cellular responses to extracellular signals. While MPs are intensely studied for their values as disease biomarkers and therapeutic targets, in situ investigation of binding kinetics of MPs with their ligands has been a challenge. Traditional approaches isolate MPs and then study them ex situ, which does not accurately reflect their native structures and functions. We present here a label-free plasmonic microscopy method to map the local binding kinetics of MPs in their native environment. This new analytical method can perform simultaneous plasmonic and fluorescence imaging, thus making it possible to combine the strengths of both label-based and label-free techniques in one system. Using this method, we have determined the distribution of MPs on the surface of single cells, and the local binding kinetic constants of different MPs. Furthermore, we have studied the polarization of the MPs on the cell surface during chemotaxis.
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DOI:
10.1083/jcb.100.4.1334
发表时间:
1985-04
期刊:
The Journal of cell biology
影响因子:
--
作者:
Gingell D;Todd I;Bailey J
通讯作者:
Bailey J
影响因子:
4
作者:
Li, GY;Xi, N;Wang, DH
通讯作者:
Wang, DH
影响因子:
64.8
作者:
通讯作者:
--
影响因子:
33.6
作者:
Albuquerque EX;Pereira EF;Alkondon M;Rogers SW
通讯作者:
Rogers SW
影响因子:
14.8
作者:
Holden, Matthew A.;Jayasinghe, Lakmal;Bayley, Hagan
通讯作者:
Bayley, Hagan