Repurposing a photosynthetic antenna protein as a super-resolution microscopy label.

Repurposing a photosynthetic antenna protein as a super-resolution microscopy label.
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DOI:
10.1038/s41598-017-16834-z
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发表时间:
2017-12-01
期刊:
影响因子:
4.6
通讯作者:
Hunter CN
Hunter CN
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Barnett SFH;Hitchcock A;Mandal AK;Vasilev C;Yuen JM;Morby J;Brindley AA;Niedzwiedzki DM;Bryant DA;Cadby AJ;Holten D;Hunter CN

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Techniques such as Stochastic Optical Reconstruction Microscopy (STORM) and Structured Illumination Microscopy (SIM) have increased the achievable resolution of optical imaging, but few fluorescent proteins are suitable for super-resolution microscopy, particularly in the far-red and near-infrared emission range. Here we demonstrate the applicability of CpcA, a subunit of the photosynthetic antenna complex in cyanobacteria, for STORM and SIM imaging. The periodicity and width of fabricated nanoarrays of CpcA, with a covalently attached phycoerythrobilin (PEB) or phycocyanobilin (PCB) chromophore, matched the lines in reconstructed STORM images. SIM and STORM reconstructions of Escherichia coli cells harbouring CpcA-labelled cytochrome bd 1 ubiquinol oxidase in the cytoplasmic membrane show that CpcA-PEB and CpcA-PCB are suitable for super-resolution imaging in vivo. The stability, ease of production, small size and brightness of CpcA-PEB and CpcA-PCB demonstrate the potential of this largely unexplored protein family as novel probes for super-resolution microscopy.
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