Quantitative real-time kinetics of optogenetic proteins CRY2 and CIB1/N using single-molecule tools.
Quantitative real-time kinetics of optogenetic proteins CRY2 and CIB1/N using single-molecule tools.
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DOI:
10.1016/j.ab.2014.04.023
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发表时间:
2014-08-01
影响因子:
2.9
通讯作者:
Irudayaraj J
中科院分区:
文献类型:
--
作者:
Cui Y;Choudhury SR;Irudayaraj J
In this work we evaluate the interaction of two optogenetic protein variants (CIB1, CIBN) with their complementary protein CRY2 by single-molecule tools in cell-free extracts. After validating the blue light induced co-localization of CRY2 and CIB1/N by Förster resonance energy transfer (FRET) in live cells, a fluorescence correlation spectroscopy (FCS) based method was developed to quantitatively determine the in vitro association of the extracted proteins. Our experiments suggest that CIB1, in comparison with CIBN, possesses a better coupling efficiency with CRY2 due to its intact protein structure and lower diffusion rate within 300 s detection window.
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