Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Fluorogenic aptamers resolve the flexibility of RNA junctions using orientation-dependent FRET

Journal Article · · RNA

To further understand the transcriptome, new tools capable of measuring folding, interactions, and localization of RNA are needed. Although Förster resonance energy transfer (FRET) is an angle- and distance-dependent phenomenon, the majority of FRET measurements have been used to report distances, by assuming rotationally averaged donor–acceptor pairs. Angle-dependent FRET measurements have proven challenging for nucleic acids due to the difficulties in incorporating fluorophores rigidly into local substructures in a biocompatible manner. Fluorescence turn-on RNA aptamers are genetically encodable tags that appear to rigidly confine their cognate fluorophores, and thus have the potential to report angular-resolved FRET. In this work, we use the fluorescent aptamers Broccoli and Mango-III as donor and acceptor, respectively, to measure the angular dependence of FRET. Joining the two fluorescent aptamers by a helix of variable length allowed systematic rotation of the acceptor fluorophore relative to the donor. FRET oscillated in a sinusoidal manner as a function of helix length, consistent with simulated data generated from models of oriented fluorophores separated by an inflexible helix. Analysis of the orientation dependence of FRET allowed us to demonstrate structural rigidification of the NiCo riboswitch upon transition metal-ion binding. This application of fluorescence turn-on aptamers opens the way to improved structural interpretation of ensemble and single-molecule FRET measurements of RNA.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC); National Institutes of Health (NIH); European Research Council (ERC); Independent Research Fund Denmark
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1837277
Alternate ID(s):
OSTI ID: 1839755
Journal Information:
RNA, Journal Name: RNA Journal Issue: 4 Vol. 27; ISSN 1355-8382
Publisher:
Cold Spring Harbor Laboratory PressCopyright Statement
Country of Publication:
United States
Language:
ENGLISH

References (59)

Supramolecular Fluorescence Resonance Energy Transfer in Nucleobase‐Modified Fluorogenic RNA Aptamers journal March 2020
Following the messenger: Recent innovations in live cell single molecule fluorescence imaging journal January 2020
Resonance Energy Transfer: Methods and Applications journal April 1994
More than just scanning: the importance of cap-independent mRNA translation initiation for cellular stress response and cancer journal December 2016
Major groove width variations in RNA structures determined by NMR and impact of 13C residual chemical shift anisotropy and 1H–13C residual dipolar coupling on refinement journal June 2010
Fluorescence lifetime imaging journal May 1992
[18] Fluorescence resonance energy transfer and nucleic acids book January 1992
Measuring protein conformational changes by FRET/LRET journal August 2002
Fretting about FRET: Failure of the Ideal Dipole Approximation journal June 2009
Cy3-DNA Stacking Interactions Strongly Depend on the Identity of the Terminal Basepair journal February 2011
Measurement of the Change in Twist at a Helical Junction in RNA Using the Orientation Dependence of FRET journal November 2013
The Kink Turn, a Key Architectural Element in RNA Structure journal February 2016
Bacterial Riboswitches Cooperatively Bind Ni 2+ or Co 2+ Ions and Control Expression of Heavy Metal Transporters journal March 2015
Analysis of X-ray and neutron scattering from biomacromolecular solutions journal October 2007
Structure-Guided Engineering of the Homodimeric Mango-IV Fluorescence Turn-on Aptamer Yields an RNA FRET Pair journal July 2020
The Growing and Glowing Toolbox of Fluorescent and Photoactive Proteins journal February 2017
Structural Principles of Fluorescent RNA Aptamers journal October 2017
Tracking RNA with light: selection, structure, and design of fluorescence turn-on RNA aptamers journal January 2019
The czcD (NiCo) Riboswitch Responds to Iron(II) journal April 2020
Crystal Structures of the Mango-II RNA Aptamer Reveal Heterogeneous Fluorophore Binding and Guide Engineering of Variants with Improved Selectivity and Brightness journal May 2018
The Structure of Cyanine 5 Terminally Attached to Double-Stranded DNA: Implications for FRET Studies journal July 2008
RNA Mango Aptamer-Fluorophore: A Bright, High-Affinity Complex for RNA Labeling and Tracking journal August 2014
Orientation Control of Fluorescence Resonance Energy Transfer Using DNA as a Helical Scaffold journal June 2005
Plug-and-Play Fluorophores Extend the Spectral Properties of Spinach journal January 2014
Broccoli: Rapid Selection of an RNA Mimic of Green Fluorescent Protein by Fluorescence-Based Selection and Directed Evolution journal November 2014
Nucleic Acid Base Analog FRET-Pair Facilitating Detailed Structural Measurements in Nucleic Acid Containing Systems journal April 2009
RNA-Based Fluorescent Biosensors for Live Cell Imaging of Second Messenger Cyclic di-AMP journal May 2015
Fluorescence Properties and Photophysics of the Sulfoindocyanine Cy3 Linked Covalently to DNA journal September 2007
Structural basis for high-affinity fluorophore binding and activation by RNA Mango journal May 2017
A superfolding Spinach2 reveals the dynamic nature of trinucleotide repeat–containing RNA journal October 2013
Structural basis for activity of highly efficient RNA mimics of green fluorescent protein journal July 2014
Observation of internal cleavage and ligation reactions of a ribozyme journal October 2004
Development of a genetically encodable FRET system using fluorescent RNA aptamers journal January 2018
Fluorogenic RNA Mango aptamers for imaging small non-coding RNAs in mammalian cells journal February 2018
Local-to-global signal transduction at the core of a Mn2+ sensing riboswitch journal September 2019
Live cell imaging of single RNA molecules with fluorogenic Mango II arrays journal March 2020
Structure and functional reselection of the Mango-III fluorogenic RNA aptamer journal April 2019
Orientation dependence in fluorescent energy transfer between Cy3 and Cy5 terminally attached to double-stranded nucleic acids journal August 2008
A four-way junction accelerates hairpin ribozyme folding via a discrete intermediate journal July 2003
Energy transfer: a spectroscopic ruler. journal August 1967
Fluorescence lifetime imaging of free and protein-bound NADH. journal February 1992
Kinking of DNA and RNA helices by bulged nucleotides observed by fluorescence resonance energy transfer. journal November 1994
Internally labeled Cy3/Cy5 DNA constructs show greatly enhanced photo-stability in single-molecule FRET experiments journal March 2014
iSpinach: a fluorogenic RNA aptamer optimized for in vitro applications journal March 2016
Orientation-dependent FRET system reveals differences in structures and flexibilities of nicked and gapped DNA duplexes journal March 2017
Automated matching of high- and low-resolution structural models journal February 2001
Uniqueness of ab initio shape determination in small-angle scattering journal April 2003
Phaser crystallographic software journal July 2007
DAMMIF, a program for rapid ab-initio shape determination in small-angle scattering journal January 2009
Determination of the regularization parameter in indirect-transform methods using perceptual criteria journal August 1992
CRYSOL – a Program to Evaluate X-ray Solution Scattering of Biological Macromolecules from Atomic Coordinates journal December 1995
XDS journal January 2010
Towards automated crystallographic structure refinement with phenix.refine journal March 2012
Co-crystal structure of the i Mango-III fluorescent RNA aptamer using an X-ray free-electron laser journal August 2019
RNA Mimics of Green Fluorescent Protein journal July 2011
Fluorophore ligand binding and complex stabilization of the RNA Mango and RNA Spinach aptamers journal October 2016
A divalent cation-dependent variant of the glmS ribozyme with stringent Ca 2+ selectivity co-opts a preexisting nonspecific metal ion-binding site journal December 2016
Crystal structure and fluorescence properties of the iSpinach aptamer in complex with DFHBI journal September 2017
A Guide to Fluorescent Protein FRET Pairs journal September 2016

Similar Records

Structure and functional reselection of the Mango-III fluorogenic RNA aptamer
Journal Article · Mon Apr 15 00:00:00 EDT 2019 · Nature Chemical Biology · OSTI ID:1512999

Imaging gene expression in real-time using aptamers
Thesis/Dissertation · Sat Dec 31 23:00:00 EST 2011 · OSTI ID:1082970

Imaging gene expression in real-time using aptamers
Thesis/Dissertation · Fri Dec 31 23:00:00 EST 2010 · OSTI ID:1048515