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Title: Repurposing a photosynthetic antenna protein as a super-resolution microscopy label

Abstract

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.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2];  [1];  [2];  [1];  [1]; ORCiD logo [2];  [3];  [1];  [2]; ORCiD logo [1]
  1. Univ. of Sheffield (United Kingdom)
  2. Washington Univ., St. Louis, MO (United States)
  3. Pennsylvania State Univ., University Park, PA (United States)
Publication Date:
Research Org.:
Washington Univ., St. Louis, MO (United States); Energy Frontier Research Centers (EFRC) (United States). Photosynthetic Antenna Research Center (PARC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1500070
Grant/Contract Number:  
SC0001035
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES

Citation Formats

Barnett, Samuel F. H., Hitchcock, Andrew, Mandal, Amit K., Vasilev, Cvetelin, Yuen, Jonathan M., Morby, James, Brindley, Amanda A., Niedzwiedzki, Dariusz M., Bryant, Donald A., Cadby, Ashley J., Holten, Dewey, and Hunter, C. Neil. Repurposing a photosynthetic antenna protein as a super-resolution microscopy label. United States: N. p., 2017. Web. doi:10.1038/s41598-017-16834-z.
Barnett, Samuel F. H., Hitchcock, Andrew, Mandal, Amit K., Vasilev, Cvetelin, Yuen, Jonathan M., Morby, James, Brindley, Amanda A., Niedzwiedzki, Dariusz M., Bryant, Donald A., Cadby, Ashley J., Holten, Dewey, & Hunter, C. Neil. Repurposing a photosynthetic antenna protein as a super-resolution microscopy label. United States. https://doi.org/10.1038/s41598-017-16834-z
Barnett, Samuel F. H., Hitchcock, Andrew, Mandal, Amit K., Vasilev, Cvetelin, Yuen, Jonathan M., Morby, James, Brindley, Amanda A., Niedzwiedzki, Dariusz M., Bryant, Donald A., Cadby, Ashley J., Holten, Dewey, and Hunter, C. Neil. Fri . "Repurposing a photosynthetic antenna protein as a super-resolution microscopy label". United States. https://doi.org/10.1038/s41598-017-16834-z. https://www.osti.gov/servlets/purl/1500070.
@article{osti_1500070,
title = {Repurposing a photosynthetic antenna protein as a super-resolution microscopy label},
author = {Barnett, Samuel F. H. and Hitchcock, Andrew and Mandal, Amit K. and Vasilev, Cvetelin and Yuen, Jonathan M. and Morby, James and Brindley, Amanda A. and Niedzwiedzki, Dariusz M. and Bryant, Donald A. and Cadby, Ashley J. and Holten, Dewey and Hunter, C. Neil},
abstractNote = {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.},
doi = {10.1038/s41598-017-16834-z},
journal = {Scientific Reports},
number = 1,
volume = 7,
place = {United States},
year = {Fri Dec 01 00:00:00 EST 2017},
month = {Fri Dec 01 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: Photophysical analysis of purified CpcA-PCB and CpcA-PEB. (a) Room temperature absorption and fluorescence emission spectra, normalised for comparison. The same fluorescence spectra were observed for a number of different excitation wavelengths for CpcA-PCB (500, 525, 550, 572 and 625 nm) and CpcA-PEB (490, 510, 525 and 557 nm).more » (b) Fluorescence decay profiles (solid blue and red circles) and dual-exponential fits (solid blue or red lines) of CpcA-PCB using excitation at 582 nm and detection at 644 nm and CpcA-PEB using excitation at 530 nm and detection at 568 nm; the time constants indicated are of the dominant, longer component. The open black circles give the instrument response function, which is approximatly a Gaussian with a full width at half maximum of 200 ps. (c) Representative time profiles (circles) and fits for decay of ground state bleaching (solid lines) or excited state absorption (dashed lines) from the transient absorption data depicted in (d). (d) Time-resolved absorption difference spectra using 100-fs excitation flashes at 590 nm for CpcA-PCB or 510 nm for CpcA-PEB. The data in the region of each spectrum that contains scattered excitation light has been removed.« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.