Nonfluorescent quenchers to correlate single-molecule conformational and compositional dynamics.
Nonfluorescent quenchers to correlate single-molecule conformational and compositional dynamics.
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DOI:
10.1021/ja2119964
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发表时间:
2012-04-04
影响因子:
15
通讯作者:
Puglisi, Joseph D.
中科院分区:
文献类型:
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作者:
Chen, Jin;Tsai, Albert;Petrov, Alexey;Puglisi, Joseph D.
Single-molecule Förster resonance energy transfer (smFRET) is a powerful method to study the conformational dynamics of a biomolecule in real-time. However, studying how interacting ligands correlate with and regulate the conformational dynamics of the biomolecule is extremely challenging due to the availability of a limited number of fluorescent dyes with both high quantum yield and minimal spectral overlap. Here, we report the use of a non-fluorescent quencher (Black Hole Quencher, BHQ) as an acceptor for smFRET. Using a Cy3/BHQ pair, we accurately follow conformational changes of the ribosome during elongation in real time. We demonstrate the application of single-color FRET to correlate the conformational dynamics of the ribosome with the compositional dynamics of tRNA. We use the normal Cy5 FRET acceptor to observe arrival of a fluorescently-labeled tRNA with a concomitant transition of the ribosome from the locked to the unlocked conformation. Our results illustrate the potential of non-fluorescent quenchers in single-molecule correlation studies.
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影响因子:
64.8
作者:
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影响因子:
7.4
作者:
Orte, Angel;Clarke, Richard W.;Kienerman, David
通讯作者:
Kienerman, David
DOI:
10.1073/pnas.0805299105
发表时间:
2008-10-07
影响因子:
11.1
作者:
Marshall, R. Andrew;Dorywalska, Magdalena;Puglisi, Joseph D.
通讯作者:
Puglisi, Joseph D.
DOI:
10.1073/pnas.0908077106
发表时间:
2009-09-15
影响因子:
11.1
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通讯作者:
Gonzalez, Ruben L., Jr.
影响因子:
16.8
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