skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Single-molecule imaging at high fluorophore concentrations by local activation of dye

Journal Article · · Biophysical Journal
 [1];  [2];  [1];  [1];  [2];  [3];  [3];  [1];  [1]
  1. Zernike Inst. of Advanced Materials, Groningen (The Netherlands)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. John Hopkins School of Medicine, Baltimore, MD (United States)

Single-molecule fluorescence microscopy is a powerful approach to observe biomolecular interactions with high spatial and temporal resolution. Detecting fluorescent signals from individual, labeled proteins above high levels of background fluorescence remains challenging, however. For this reason, the concentrations of labeled proteins in in vitro assays are often kept low compared to their in vivo concentrations. Here, we present a new fluorescence imaging technique by which single fluorescent molecules can be observed in real time at high, physiologically relevant concentrations. The technique requires a protein and its macromolecular substrate to be labeled each with a different fluorophore. Then, making use of short-distance energy-transfer mechanisms, the fluorescence from only those proteins bound to their substrate are selectively activated. This approach is demonstrated by labeling a DNA substrate with an intercalating stain, exciting the stain, and using energy transfer from the stain to activate the fluorescence of only those labeled DNA-binding proteins bound to the DNA. Such an experimental design allowed us to observe the sequence-independent interaction of Cy5-labeled interferon-inducible protein 16 (IFI16) with DNA and the sliding via one-dimensional diffusion of Cy5-labeled adenovirus protease (pVIc-AVP) on DNA in the presence of a background of hundreds of nM Cy5 fluorophore.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
Netherlands Organization for Scientific Research (NWO); European Research Council (ERC); National Institutes of Health (NIH)
Grant/Contract Number:
SC00112704
OSTI ID:
1184512
Report Number(s):
BNL-107889-2015-JA; 400412000
Journal Information:
Biophysical Journal, Vol. 108, Issue 4; ISSN 0006-3495
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

References (29)

Single-molecule approaches to characterizing kinetics of biomolecular interactions journal February 2011
Breaking the concentration limit of optical single-molecule detection journal January 2014
Immobilization in Surface-Tethered Lipid Vesicles as a New Tool for Single Biomolecule Spectroscopy journal December 2001
Zero-Mode Waveguides for Single-Molecule Analysis at High Concentrations journal January 2003
A general approach to break the concentration barrier in single-molecule imaging journal September 2012
Probing Transient Copper Chaperone−Wilson Disease Protein Interactions at the Single-Molecule Level with Nanovesicle Trapping journal February 2008
Cooperative assembly of IFI16 filaments on dsDNA provides insights into host defense strategy journal December 2013
Viral DNA and a viral peptide can act as cofactors of adenovirus virion proteinase activity journal January 1993
Characterization of Three Components of Human Adenovirus Proteinase Activity in Vitro journal January 1996
Calculation of protein extinction coefficients from amino acid sequence data journal November 1989
Roles of Two Conserved Cysteine Residues in the Activation of Human Adenovirus Proteinase journal December 2001
In the Virion, the 11-Amino-Acid Peptide Cofactor pVIc Is Covalently Linked to the Adenovirus Proteinase journal May 2002
ExPASy: the proteomics server for in-depth protein knowledge and analysis journal July 2003
Visualizing DNA Replication at the Single-Molecule Level book January 2010
Single-Molecule Kinetics of   Exonuclease Reveal Base Dependence and Dynamic Disorder journal August 2003
Nonblinking and long-lasting single-molecule fluorescence imaging journal October 2006
Carbocyanine Dyes as Efficient Reversible Single-Molecule Optical Switch journal March 2005
Short-Range Spectroscopic Ruler Based on a Single-Molecule Optical Switch journal March 2005
Ultrabright photoactivatable fluorophores created by reductive caging journal October 2012
Phosphine Quenching of Cyanine Dyes as a Versatile Tool for Fluorescence Microscopy journal January 2013
Photoswitching Mechanism of Cyanine Dyes journal December 2009
Cy3-Cy5 Covalent Heterodimers for Single-Molecule Photoswitching journal August 2008
IFI16 DNA Sensor Is Required for Death of Lymphoid CD4 T Cells Abortively Infected with HIV journal December 2013
A single-molecule characterization of p53 search on DNA journal December 2010
Regulation of a Viral Proteinase by a Peptide and DNA in One-dimensional Space: IV. VIRAL PROTEINASE SLIDES ALONG DNA TO LOCATE AND PROCESS ITS SUBSTRATES journal October 2012
Quantification of dye-mediated photodamage during single-molecule DNA imaging journal July 2012
Sequence information can be obtained from single DNA molecules journal March 2003
Monitoring multiple distances within a single molecule using switchable FRET journal September 2010
Photoswitching Mechanism of Cyanine Dyes journal January 2010

Cited By (3)

Dissection of Protein Kinase Pathways in Live Cells Using Photoluminescent Probes: Surveillance or Interrogation? journal April 2018
Caging and Photoactivation in Single-Molecule Förster Resonance Energy Transfer Experiments journal March 2017
Watching cellular machinery in action, one molecule at a time journal December 2016

Similar Records

Photon-counting single-molecule spectroscopy for studying conformational dynamics and macromolecular interactions
Thesis/Dissertation · Tue Jan 01 00:00:00 EST 2002 · OSTI ID:1184512

Imaging analysis of nuclear antiviral factors through direct detection of incoming adenovirus genome complexes
Journal Article · Fri Apr 22 00:00:00 EDT 2016 · Biochemical and Biophysical Research Communications · OSTI ID:1184512

Dissection of the angle of single fluorophore attached to the nucleotide in corkscrewing microtubules
Journal Article · Sat Apr 08 00:00:00 EDT 2017 · Biochemical and Biophysical Research Communications · OSTI ID:1184512