A Toolbox for Site-Specific Labeling of RecQ Helicase With a Single Fluorophore Used in the Single-Molecule Assay.
A Toolbox for Site-Specific Labeling of RecQ Helicase With a Single Fluorophore Used in the Single-Molecule Assay.
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用于单分子测定中使用的单一荧光团对 RecQ 解旋酶进行位点特异性标记的工具箱
DOI:
10.3389/fmolb.2020.586450
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发表时间:
2020
影响因子:
5
通讯作者:
Xu Y
中科院分区:
文献类型:
--
作者:
Teng FY;Jiang ZZ;Huang LY;Guo M;Chen F;Hou XM;Xi XG;Xu Y
Fluorescently labeled proteins can improve the detection sensitivity and have been widely used in a variety of biological measurements. In single-molecule assays, site-specific labeling of proteins enables the visualization of molecular interactions, conformational changes in proteins, and enzymatic activity. In this study, based on a flexible linker in the Escherichia coli RecQ helicase, we established a scheme involving a combination of fluorophore labeling and sortase A ligation to allow site-specific labeling of the HRDC domain of RecQ with a single Cy5 fluorophore, without inletting extra fluorescent domain or peptide fragment. Using single-molecule fluorescence resonance energy transfer, we visualized that Cy5-labeled HRDC could directly interact with RecA domains and could bind to both the 3′ and 5′ ends of the overhang DNA dynamically in vitro for the first time. The present work not only reveals the functional mechanism of the HRDC domain, but also provides a feasible method for site-specific labeling of a domain with a single fluorophore used in single-molecule assays.
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影响因子:
16.6
作者:
Croteau DL;Popuri V;Opresko PL;Bohr VA
通讯作者:
Bohr VA
DOI:
10.1002/anie.201505277
发表时间:
2015-09-28
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
作者:
Li Z;Theile CS;Chen GY;Bilate AM;Duarte JN;Avalos AM;Fang T;Barberena R;Sato S;Ploegh HL
通讯作者:
Ploegh HL
影响因子:
4.6
作者:
Ohana, Rachel Friedman;Hurst, Robin;Wood, Keith, V
通讯作者:
Wood, Keith, V
影响因子:
13.8
作者:
Morozov, V;Mushegian, AR;Bork, P
通讯作者:
Bork, P
DOI:
10.1073/pnas.0908640106
发表时间:
2009-12-15
影响因子:
11.1
作者:
Christian, Thomas D.;Romano, Louis J.;Rueda, David
通讯作者:
Rueda, David