Super-resolution imaging and tracking of protein-protein interactions in sub-diffraction cellular space.

Super-resolution imaging and tracking of protein-protein interactions in sub-diffraction cellular space.
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DOI:
10.1038/ncomms5443
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发表时间:
2014-07-17
影响因子:
16.6
通讯作者:
Sun Y
Sun Y
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Liu Z;Xing D;Su QP;Zhu Y;Zhang J;Kong X;Xue B;Wang S;Sun H;Tao Y;Sun Y

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Imaging the location and dynamics of individual interacting protein pairs is essential but often difficult because of the fluorescent background from other paired and non-paired molecules, particularly in the sub-diffraction cellular space. Here we develop a new method combining bimolecular fluorescence complementation and photoactivated localization microscopy for super-resolution imaging and single-molecule tracking of specific protein–protein interactions. The method is used to study the interaction of two abundant proteins, MreB and EF-Tu, in Escherichia coli cells. The super-resolution imaging shows interesting distribution and domain sizes of interacting MreB–EF-Tu pairs as a subpopulation of total EF-Tu. The single-molecule tracking of MreB, EF-Tu and MreB–EF-Tu pairs reveals intriguing localization-dependent heterogonous dynamics and provides valuable insights to understanding the roles of MreB–EF-Tu interactions. Protein–protein interactions are ubiquitous in cells and these contacts are crucial for a wide number of cellular processes. Here, the authors present a technique for the super-resolution imaging and tracking of protein–protein interactions in cells.
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